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qtjambi-doc-4.3.3-3mdv2008.1.i586.rpm

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com.trolltech.qt.core</FONT>
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Class QDataStream</H2>
<PRE>
java.lang.Object
  <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../com/trolltech/qt/QSignalEmitter.html" title="class in com.trolltech.qt">com.trolltech.qt.QSignalEmitter</A>
      <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../com/trolltech/qt/QtJambiObject.html" title="class in com.trolltech.qt">com.trolltech.qt.QtJambiObject</A>
          <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>com.trolltech.qt.core.QDataStream</B>
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<DL>
<DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../com/trolltech/qt/QtJambiInterface.html" title="interface in com.trolltech.qt">QtJambiInterface</A></DD>
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<DT><PRE>public class <B>QDataStream</B><DT>extends <A HREF="../../../../com/trolltech/qt/QtJambiObject.html" title="class in com.trolltech.qt">QtJambiObject</A></DL>
</PRE>

<P>
<p>The <a href="QDataStream.html#QDataStream()"><tt>QDataStream</tt></a> class provides serialization of binary data to a <a href="QIODevice.html"><tt>QIODevice</tt></a>.</p>
<p>A data stream is a binary stream of encoded information which is 100% independent of the host computer's operating system, CPU or byte order. For example, a data stream that is written by a PC under Windows can be read by a Sun SPARC running Solaris.</p>
<p>You can also use a data stream to read/write <a href="QDataStream.html#raw">raw unencoded binary data</tt></a>. If you want a &quot;parsing&quot; input stream, see <a href="QTextStream.html"><tt>QTextStream</tt></a>.</p>
<p>The <a href="QDataStream.html#QDataStream()"><tt>QDataStream</tt></a> class implements the serialization of C++'s basic data types, like <tt>char</tt>, <tt>short</tt>, <tt>int</tt>, <tt>char *</tt>, etc. Serialization of more complex data is accomplished by breaking up the data into primitive units.</p>
<p>A data stream cooperates closely with a <a href="QIODevice.html"><tt>QIODevice</tt></a>. A <a href="QIODevice.html"><tt>QIODevice</tt></a> represents an input/output medium one can read data from and write data to. The <a href="QFile.html"><tt>QFile</tt></a> class is an example of an I/O device.</p>
<p>Example (write binary data to a stream):</p>
<pre>    QFile file(&quot;file.dat&quot;);
    file.open(QIODevice::WriteOnly);
    QDataStream out(&amp;file);   <span class="comment">// we will serialize the data into the file</span>
    out &lt;&lt; &quot;the answer is&quot;;   <span class="comment">// serialize a string</span>
    out &lt;&lt; (qint32)42;        <span class="comment">// serialize an integer</span></pre>
<p>Example (read binary data from a stream):</p>
<pre>    QFile file(&quot;file.dat&quot;);
    file.open(QIODevice::ReadOnly);
    QDataStream in(&amp;file);    <span class="comment">// read the data serialized from the file</span>
    QString str;
    qint32 a;
    in &gt;&gt; str &gt;&gt; a;           <span class="comment">// extract &quot;the answer is&quot; and 42</span></pre>
<p>Each item written to the stream is written in a predefined binary format that varies depending on the item's type. Supported Qt types include <a href="%2E%2E/gui/QBrush.html"><tt>QBrush</tt></a>, <a href="%2E%2E/gui/QColor.html"><tt>QColor</tt></a>, <a href="QDateTime.html"><tt>QDateTime</tt></a>, <a href="%2E%2E/gui/QFont.html"><tt>QFont</tt></a>, <a href="%2E%2E/gui/QPixmap.html"><tt>QPixmap</tt></a>, <a href="%2E%2E/porting4.html#qstring"><tt>QString</tt></a>, <a href="%2E%2E/porting4.html#qvariant"><tt>QVariant</tt></a> and many others. For the complete list of all Qt types supporting data streaming see the <a href="%2E%2E/datastreamformat.html"><tt>Format of the QDataStream operators</tt></a>.</p>
<p>For integers it is best to always cast to a Qt integer type for writing, and to read back into the same Qt integer type. This ensures that you get integers of the size you want and insulates you from compiler and platform differences.</p>
<p>To take one example, a <tt>char *</tt> string is written as a 32-bit integer equal to the length of the string including the '\0' byte, followed by all the characters of the string including the '\0' byte. When reading a <tt>char *</tt> string, 4 bytes are read to create the 32-bit length value, then that many characters for the <tt>char *</tt> string including the '\0' terminator are read.</p>
<p>The initial I/O device is usually set in the constructor, but can be changed with <a href="QDataStream.html#setDevice(com.trolltech.qt.core.QIODevice)"><tt>setDevice</tt></a>. If you've reached the end of the data (or if there is no I/O device set) <a href="QDataStream.html#atEnd()"><tt>atEnd</tt></a> will return true.</p>
<a name="versioning"></a>
<h3>Versioning</h3>
<p><a href="QDataStream.html#QDataStream()"><tt>QDataStream</tt></a>'s binary format has evolved since Qt 1.0, and is likely to continue evolving to reflect changes done in Qt. When inputting or outputting complex types, it's very important to make sure that the same version of the stream (<a href="QDataStream.html#version()"><tt>version</tt></a>) is used for reading and writing. If you need both forward and backward compatibility, you can hardcode the version number in the application:</p>
<pre>    stream.setVersion(QDataStream::Qt_4_0);</pre>
<p>If you are producing a new binary data format, such as a file format for documents created by your application, you could use a <a href="QDataStream.html#QDataStream()"><tt>QDataStream</tt></a> to write the data in a portable format. Typically, you would write a brief header containing a magic string and a version number to give yourself room for future expansion. For example:</p>
<pre>    QFile file(&quot;file.xxx&quot;);
    file.open(QIODevice::WriteOnly);
    QDataStream out(&amp;file);

<span class="comment">    // Write a header with a &quot;magic number&quot; and a version</span>
    out &lt;&lt; (quint32)0xA0B0C0D0;
    out &lt;&lt; (qint32)123;

    out.setVersion(QDataStream::Qt_4_0);

<span class="comment">    // Write the data</span>
    out &lt;&lt; lots_of_interesting_data;</pre>
<p>Then read it in with:</p>
<pre>    QFile file(&quot;file.xxx&quot;);
    file.open(QIODevice::ReadOnly);
    QDataStream in(&amp;file);

<span class="comment">    // Read and check the header</span>
    quint32 magic;
    in &gt;&gt; magic;
    if (magic != 0xA0B0C0D0)
        return XXX_BAD_FILE_FORMAT;

<span class="comment">    // Read the version</span>
    qint32 version;
    in &gt;&gt; version;
    if (version &lt; 100)
        return XXX_BAD_FILE_TOO_OLD;
    if (version &gt; 123)
        return XXX_BAD_FILE_TOO_NEW;

    if (version &lt;= 110)
        in.setVersion(QDataStream::Qt_3_2);
    else
        in.setVersion(QDataStream::Qt_4_0);

<span class="comment">    // Read the data</span>
    in &gt;&gt; lots_of_interesting_data;
    if (version &gt;= 120)
        in &gt;&gt; data_new_in_XXX_version_1_2;
    in &gt;&gt; other_interesting_data;</pre>
<p>You can select which byte order to use when serializing data. The default setting is big endian (MSB first). Changing it to little endian breaks the portability (unless the reader also changes to little endian). We recommend keeping this setting unless you have special requirements.</p>
<a name="raw"></a><a name="reading-and-writing-raw-binary-data"></a>
<h3>Reading and writing raw binary data</h3>
<p>You may wish to read/write your own raw binary data to/from the data stream directly. Data may be read from the stream into a preallocated <tt>char *</tt> using readRawData(). Similarly data can be written to the stream using writeRawData(). Note that any encoding/decoding of the data must be done by you.</p>
<p>A similar pair of functions is readBytes() and writeBytes(). These differ from their <i>raw</i> counterparts as follows: readBytes() reads a quint32 which is taken to be the length of the data to be read, then that number of bytes is read into the preallocated <tt>char *</tt>; writeBytes() writes a quint32 containing the length of the data, followed by the data. Note that any encoding/decoding of the data (apart from the length quint32) must be done by you.</p>
<P>

<P>
<DL>
<DT><B>See Also:</B><DD><a href="QTextStream.html"><tt>QTextStream</tt></a>, 
<a href="%2E%2E/porting4.html#qvariant"><tt>QVariant</tt></a></DL>
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<CODE>static&nbsp;class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.Status.html" title="enum in com.trolltech.qt.core">QDataStream.Status</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This enum describes the current status of the data stream.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.Version.html" title="enum in com.trolltech.qt.core">QDataStream.Version</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This enum provides symbolic synonyms for the data serialization format version numbers.</TD>
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<TH ALIGN="left"><B>Nested classes/interfaces inherited from class com.trolltech.qt.<A HREF="../../../../com/trolltech/qt/QSignalEmitter.html" title="class in com.trolltech.qt">QSignalEmitter</A></B></TH>
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<TD><CODE><A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal0.html" title="class in com.trolltech.qt">QSignalEmitter.Signal0</A>, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal1.html" title="class in com.trolltech.qt">QSignalEmitter.Signal1</A>&lt;<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal1.html" title="type parameter in QSignalEmitter.Signal1">A</A>&gt;, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal2.html" title="class in com.trolltech.qt">QSignalEmitter.Signal2</A>&lt;<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal2.html" title="type parameter in QSignalEmitter.Signal2">A</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal2.html" title="type parameter in QSignalEmitter.Signal2">B</A>&gt;, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal3.html" title="class in com.trolltech.qt">QSignalEmitter.Signal3</A>&lt;<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal3.html" title="type parameter in QSignalEmitter.Signal3">A</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal3.html" title="type parameter in QSignalEmitter.Signal3">B</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal3.html" title="type parameter in QSignalEmitter.Signal3">C</A>&gt;, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal4.html" title="class in com.trolltech.qt">QSignalEmitter.Signal4</A>&lt;<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal4.html" title="type parameter in QSignalEmitter.Signal4">A</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal4.html" title="type parameter in QSignalEmitter.Signal4">B</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal4.html" title="type parameter in QSignalEmitter.Signal4">C</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal4.html" title="type parameter in QSignalEmitter.Signal4">D</A>&gt;, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal5.html" title="class in com.trolltech.qt">QSignalEmitter.Signal5</A>&lt;<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal5.html" title="type parameter in QSignalEmitter.Signal5">A</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal5.html" title="type parameter in QSignalEmitter.Signal5">B</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal5.html" title="type parameter in QSignalEmitter.Signal5">C</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal5.html" title="type parameter in QSignalEmitter.Signal5">D</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal5.html" title="type parameter in QSignalEmitter.Signal5">E</A>&gt;, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal6.html" title="class in com.trolltech.qt">QSignalEmitter.Signal6</A>&lt;<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal6.html" title="type parameter in QSignalEmitter.Signal6">A</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal6.html" title="type parameter in QSignalEmitter.Signal6">B</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal6.html" title="type parameter in QSignalEmitter.Signal6">C</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal6.html" title="type parameter in QSignalEmitter.Signal6">D</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal6.html" title="type parameter in QSignalEmitter.Signal6">E</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal6.html" title="type parameter in QSignalEmitter.Signal6">F</A>&gt;, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal7.html" title="class in com.trolltech.qt">QSignalEmitter.Signal7</A>&lt;<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal7.html" title="type parameter in QSignalEmitter.Signal7">A</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal7.html" title="type parameter in QSignalEmitter.Signal7">B</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal7.html" title="type parameter in QSignalEmitter.Signal7">C</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal7.html" title="type parameter in QSignalEmitter.Signal7">D</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal7.html" title="type parameter in QSignalEmitter.Signal7">E</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal7.html" title="type parameter in QSignalEmitter.Signal7">F</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal7.html" title="type parameter in QSignalEmitter.Signal7">G</A>&gt;, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal8.html" title="class in com.trolltech.qt">QSignalEmitter.Signal8</A>&lt;<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal8.html" title="type parameter in QSignalEmitter.Signal8">A</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal8.html" title="type parameter in QSignalEmitter.Signal8">B</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal8.html" title="type parameter in QSignalEmitter.Signal8">C</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal8.html" title="type parameter in QSignalEmitter.Signal8">D</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal8.html" title="type parameter in QSignalEmitter.Signal8">E</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal8.html" title="type parameter in QSignalEmitter.Signal8">F</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal8.html" title="type parameter in QSignalEmitter.Signal8">G</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal8.html" title="type parameter in QSignalEmitter.Signal8">H</A>&gt;, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal9.html" title="class in com.trolltech.qt">QSignalEmitter.Signal9</A>&lt;<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal9.html" title="type parameter in QSignalEmitter.Signal9">A</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal9.html" title="type parameter in QSignalEmitter.Signal9">B</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal9.html" title="type parameter in QSignalEmitter.Signal9">C</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal9.html" title="type parameter in QSignalEmitter.Signal9">D</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal9.html" title="type parameter in QSignalEmitter.Signal9">E</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal9.html" title="type parameter in QSignalEmitter.Signal9">F</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal9.html" title="type parameter in QSignalEmitter.Signal9">G</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal9.html" title="type parameter in QSignalEmitter.Signal9">H</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal9.html" title="type parameter in QSignalEmitter.Signal9">I</A>&gt;</CODE></TD>
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<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#QDataStream()">QDataStream</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a data stream that has no I/O device.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#QDataStream(com.trolltech.qt.core.QByteArray)">QDataStream</A></B>(<A HREF="../../../../com/trolltech/qt/core/QByteArray.html" title="class in com.trolltech.qt.core">QByteArray</A>&nbsp;arg__1)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a read-only data stream that operates on byte array <tt>arg__1</tt>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#QDataStream(com.trolltech.qt.core.QByteArray, com.trolltech.qt.core.QIODevice.OpenMode)">QDataStream</A></B>(<A HREF="../../../../com/trolltech/qt/core/QByteArray.html" title="class in com.trolltech.qt.core">QByteArray</A>&nbsp;a,
            <A HREF="../../../../com/trolltech/qt/core/QIODevice.OpenMode.html" title="class in com.trolltech.qt.core">QIODevice.OpenMode</A>&nbsp;mode)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a data stream that operates on a byte array, <tt>a</tt>.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#QDataStream(com.trolltech.qt.core.QByteArray, com.trolltech.qt.core.QIODevice.OpenModeFlag...)">QDataStream</A></B>(<A HREF="../../../../com/trolltech/qt/core/QByteArray.html" title="class in com.trolltech.qt.core">QByteArray</A>&nbsp;a,
            <A HREF="../../../../com/trolltech/qt/core/QIODevice.OpenModeFlag.html" title="enum in com.trolltech.qt.core">QIODevice.OpenModeFlag</A>...&nbsp;mode)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a data stream that operates on a byte array, <tt>a</tt>.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#QDataStream(com.trolltech.qt.core.QIODevice)">QDataStream</A></B>(<A HREF="../../../../com/trolltech/qt/core/QIODevice.html" title="class in com.trolltech.qt.core">QIODevice</A>&nbsp;arg__1)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a data stream that uses the I/O device <tt>arg__1</tt>.</TD>
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<!-- ========== METHOD SUMMARY =========== -->

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<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>Method Summary</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#atEnd()">atEnd</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns true if the I/O device has reached the end position (end of the stream or file) or if there is no I/O device set; otherwise returns false.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../com/trolltech/qt/core/QIODevice.html" title="class in com.trolltech.qt.core">QIODevice</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#device()">device</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the I/O device currently set.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="../../../../com/trolltech/qt/core/QDataStream.html" title="class in com.trolltech.qt.core">QDataStream</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#fromNativePointer(com.trolltech.qt.QNativePointer)">fromNativePointer</A></B>(<A HREF="../../../../com/trolltech/qt/QNativePointer.html" title="class in com.trolltech.qt">QNativePointer</A>&nbsp;nativePointer)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This function returns the QDataStream instance pointed to by nativePointer</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#readBoolean()">readBoolean</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This function reads a boolean from the stream.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;byte</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#readByte()">readByte</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This function read a byte from the stream.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#readBytes(byte[])">readBytes</A></B>(byte[]&nbsp;buffer)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This function reads bytes from the stream into <tt>buffer</tt>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#readBytes(byte[], int)">readBytes</A></B>(byte[]&nbsp;buffer,
          int&nbsp;length)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This function reads <tt>length</tt> bytes from the stream into
<tt>buffer</tt>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;double</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#readDouble()">readDouble</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This function read a double from the stream.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;float</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#readFloat()">readFloat</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This function reads a float from the stream.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#readInt()">readInt</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This function reads an int from the stream.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;long</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#readLong()">readLong</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This function reads a long from the stream.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;short</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#readShort()">readShort</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This function reads a short from the stream.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#readString()">readString</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This function reads a string from the stream.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#resetStatus()">resetStatus</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Resets the status of the data stream.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#setDevice(com.trolltech.qt.core.QIODevice)">setDevice</A></B>(<A HREF="../../../../com/trolltech/qt/core/QIODevice.html" title="class in com.trolltech.qt.core">QIODevice</A>&nbsp;arg__1)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;void QDataStream::setDevice(<a href="QIODevice.html"><tt>QIODevice</tt></a> *d)</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#setStatus(com.trolltech.qt.core.QDataStream.Status)">setStatus</A></B>(<A HREF="../../../../com/trolltech/qt/core/QDataStream.Status.html" title="enum in com.trolltech.qt.core">QDataStream.Status</A>&nbsp;status)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets the status of the data stream to the <tt>status</tt> given.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#setVersion(int)">setVersion</A></B>(int&nbsp;arg__1)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets the version number of the data serialization format to <tt>arg__1</tt>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#skipRawData(int)">skipRawData</A></B>(int&nbsp;len)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Skips <tt>len</tt> bytes from the device.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../com/trolltech/qt/core/QDataStream.Status.html" title="enum in com.trolltech.qt.core">QDataStream.Status</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#status()">status</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the status of the data stream.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#unsetDevice()">unsetDevice</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Unsets the I/O device.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#version()">version</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the version number of the data serialization format.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../com/trolltech/qt/core/QDataStream.html" title="class in com.trolltech.qt.core">QDataStream</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#writeBoolean(boolean)">writeBoolean</A></B>(boolean&nbsp;i)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Writes a boolean value, <tt>i</tt>, to the stream.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../com/trolltech/qt/core/QDataStream.html" title="class in com.trolltech.qt.core">QDataStream</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#writeByte(byte)">writeByte</A></B>(byte&nbsp;i)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Writes the byte <tt>i</tt> to the stream.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#writeBytes(byte[])">writeBytes</A></B>(byte[]&nbsp;buffer)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This function writes the bytes in <tt>buffer</tt> to the stream.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#writeBytes(byte[], int)">writeBytes</A></B>(byte[]&nbsp;buffer,
           int&nbsp;length)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This function writes the <tt>length</tt> bytes of <tt>buffer</tt> to
the stream.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../com/trolltech/qt/core/QDataStream.html" title="class in com.trolltech.qt.core">QDataStream</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#writeDouble(double)">writeDouble</A></B>(double&nbsp;f)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Writes a 64-bit floating point number, <tt>f</tt>, to the stream using the standard IEEE 754 format.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../com/trolltech/qt/core/QDataStream.html" title="class in com.trolltech.qt.core">QDataStream</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#writeFloat(float)">writeFloat</A></B>(float&nbsp;f)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Writes a 32-bit floating point number, <tt>f</tt>, to the stream using the standard IEEE 754 format.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../com/trolltech/qt/core/QDataStream.html" title="class in com.trolltech.qt.core">QDataStream</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#writeInt(int)">writeInt</A></B>(int&nbsp;i)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Writes a signed 32-bit integer, <tt>i</tt>, to the stream and returns a reference to the stream.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../com/trolltech/qt/core/QDataStream.html" title="class in com.trolltech.qt.core">QDataStream</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#writeLong(long)">writeLong</A></B>(long&nbsp;i)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Writes a signed 64-bit integer, <tt>i</tt>, to the stream and returns a reference to the stream.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../com/trolltech/qt/core/QDataStream.html" title="class in com.trolltech.qt.core">QDataStream</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#writeShort(short)">writeShort</A></B>(short&nbsp;s)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This function writes the short <tt>s/tt> to the stream.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QDataStream.html#writeString(java.lang.String)">writeString</A></B>(java.lang.String&nbsp;string)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This function writes the short <tt>s/tt> to the stream.</TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_com.trolltech.qt.QtJambiObject"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class com.trolltech.qt.<A HREF="../../../../com/trolltech/qt/QtJambiObject.html" title="class in com.trolltech.qt">QtJambiObject</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../com/trolltech/qt/QtJambiObject.html#dispose()">dispose</A>, <A HREF="../../../../com/trolltech/qt/QtJambiObject.html#disposed()">disposed</A>, <A HREF="../../../../com/trolltech/qt/QtJambiObject.html#finalize()">finalize</A>, <A HREF="../../../../com/trolltech/qt/QtJambiObject.html#reassignNativeResources(com.trolltech.qt.QtJambiObject, java.lang.Class)">reassignNativeResources</A>, <A HREF="../../../../com/trolltech/qt/QtJambiObject.html#tr(java.lang.String)">tr</A>, <A HREF="../../../../com/trolltech/qt/QtJambiObject.html#tr(java.lang.String, java.lang.String)">tr</A>, <A HREF="../../../../com/trolltech/qt/QtJambiObject.html#tr(java.lang.String, java.lang.String, int)">tr</A></CODE></TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_com.trolltech.qt.QSignalEmitter"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class com.trolltech.qt.<A HREF="../../../../com/trolltech/qt/QSignalEmitter.html" title="class in com.trolltech.qt">QSignalEmitter</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../com/trolltech/qt/QSignalEmitter.html#blockSignals(boolean)">blockSignals</A>, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.html#disconnect()">disconnect</A>, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.html#disconnect(java.lang.Object)">disconnect</A>, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.html#signalsBlocked()">signalsBlocked</A>, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.html#signalSender()">signalSender</A>, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.html#thread()">thread</A></CODE></TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE>clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_com.trolltech.qt.QtJambiInterface"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from interface com.trolltech.qt.<A HREF="../../../../com/trolltech/qt/QtJambiInterface.html" title="interface in com.trolltech.qt">QtJambiInterface</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../com/trolltech/qt/QtJambiInterface.html#disableGarbageCollection()">disableGarbageCollection</A>, <A HREF="../../../../com/trolltech/qt/QtJambiInterface.html#nativeId()">nativeId</A>, <A HREF="../../../../com/trolltech/qt/QtJambiInterface.html#nativePointer()">nativePointer</A>, <A HREF="../../../../com/trolltech/qt/QtJambiInterface.html#reenableGarbageCollection()">reenableGarbageCollection</A>, <A HREF="../../../../com/trolltech/qt/QtJambiInterface.html#setJavaOwnership()">setJavaOwnership</A></CODE></TD>
</TR>
</TABLE>
&nbsp;
<P>

<!-- ========= CONSTRUCTOR DETAIL ======== -->

<A NAME="constructor_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
<B>Constructor Detail</B></FONT></TH>
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</TABLE>

<A NAME="QDataStream(com.trolltech.qt.core.QIODevice)"><!-- --></A><H3>
QDataStream</H3>
<PRE>
public <B>QDataStream</B>(<A HREF="../../../../com/trolltech/qt/core/QIODevice.html" title="class in com.trolltech.qt.core">QIODevice</A>&nbsp;arg__1)</PRE>
<DL>
<DD><p>Constructs a data stream that uses the I/O device <tt>arg__1</tt>.</p>
<p><b>Warning:</b> If you use <a href="%2E%2E/porting4.html#qsocket"><tt>QSocket</tt></a> or <a href="%2E%2E/porting4.html#qsocketdevice"><tt>QSocketDevice</tt></a> as the I/O device <tt>arg__1</tt> for reading data, you must make sure that enough data is available on the socket for the operation to successfully proceed; <a href="QDataStream.html#QDataStream()"><tt>QDataStream</tt></a> does not have any means to handle or recover from short-reads.</p>
<P>
<DL>
<DT><B>See Also:</B><DD><a href="QDataStream.html#setDevice(com.trolltech.qt.core.QIODevice)"><tt>setDevice</tt></a>, 
<a href="QDataStream.html#device()"><tt>device</tt></a></DL>
</DL>
<HR>

<A NAME="QDataStream(com.trolltech.qt.core.QByteArray)"><!-- --></A><H3>
QDataStream</H3>
<PRE>
public <B>QDataStream</B>(<A HREF="../../../../com/trolltech/qt/core/QByteArray.html" title="class in com.trolltech.qt.core">QByteArray</A>&nbsp;arg__1)</PRE>
<DL>
<DD><p>Constructs a read-only data stream that operates on byte array <tt>arg__1</tt>. Use <a href="QDataStream.html#QDataStream()"><tt>QDataStream</tt></a>(<a href="QByteArray.html"><tt>QByteArray</tt></a>*, int) if you want to write to a byte array.</p>
<p>Since <a href="QByteArray.html"><tt>QByteArray</tt></a> is not a <a href="QIODevice.html"><tt>QIODevice</tt></a> subclass, internally a <a href="QBuffer.html"><tt>QBuffer</tt></a> is created to wrap the byte array.</p>
<P>
</DL>
<HR>

<A NAME="QDataStream()"><!-- --></A><H3>
QDataStream</H3>
<PRE>
public <B>QDataStream</B>()</PRE>
<DL>
<DD><p>Constructs a data stream that has no I/O device.</p>
<P>
<DL>
<DT><B>See Also:</B><DD><a href="QDataStream.html#setDevice(com.trolltech.qt.core.QIODevice)"><tt>setDevice</tt></a></DL>
</DL>
<HR>

<A NAME="QDataStream(com.trolltech.qt.core.QByteArray, com.trolltech.qt.core.QIODevice.OpenMode)"><!-- --></A><H3>
QDataStream</H3>
<PRE>
public <B>QDataStream</B>(<A HREF="../../../../com/trolltech/qt/core/QByteArray.html" title="class in com.trolltech.qt.core">QByteArray</A>&nbsp;a,
                   <A HREF="../../../../com/trolltech/qt/core/QIODevice.OpenMode.html" title="class in com.trolltech.qt.core">QIODevice.OpenMode</A>&nbsp;mode)</PRE>
<DL>
<DD>Constructs a data stream that operates on a byte array, <tt>a</tt>. The
<tt>mode</tt> describes how the device is to be used.

Since QByteArray is not a QIODevice subclass, internally a QBuffer
is created to wrap the byte array.
<P>
</DL>
<HR>

<A NAME="QDataStream(com.trolltech.qt.core.QByteArray, com.trolltech.qt.core.QIODevice.OpenModeFlag...)"><!-- --></A><H3>
QDataStream</H3>
<PRE>
public <B>QDataStream</B>(<A HREF="../../../../com/trolltech/qt/core/QByteArray.html" title="class in com.trolltech.qt.core">QByteArray</A>&nbsp;a,
                   <A HREF="../../../../com/trolltech/qt/core/QIODevice.OpenModeFlag.html" title="enum in com.trolltech.qt.core">QIODevice.OpenModeFlag</A>...&nbsp;mode)</PRE>
<DL>
<DD>Constructs a data stream that operates on a byte array, <tt>a</tt>. The
<tt>mode</tt> describes how the device is to be used.

Since QByteArray is not a QIODevice subclass, internally a QBuffer
is created to wrap the byte array.
<P>
</DL>

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<B>Method Detail</B></FONT></TH>
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<A NAME="atEnd()"><!-- --></A><H3>
atEnd</H3>
<PRE>
public final boolean <B>atEnd</B>()</PRE>
<DL>
<DD><p>Returns true if the I/O device has reached the end position (end of the stream or file) or if there is no I/O device set; otherwise returns false.</p>
<P>
<DD><DL>
<DT><B>See Also:</B><DD><tt>QIODevice::atEnd</tt></DL>
</DD>
</DL>
<HR>

<A NAME="device()"><!-- --></A><H3>
device</H3>
<PRE>
public final <A HREF="../../../../com/trolltech/qt/core/QIODevice.html" title="class in com.trolltech.qt.core">QIODevice</A> <B>device</B>()</PRE>
<DL>
<DD><p>Returns the I/O device currently set.</p>
<P>
<DD><DL>
<DT><B>See Also:</B><DD><a href="QDataStream.html#setDevice(com.trolltech.qt.core.QIODevice)"><tt>setDevice</tt></a>, 
<a href="QDataStream.html#unsetDevice()"><tt>unsetDevice</tt></a></DL>
</DD>
</DL>
<HR>

<A NAME="writeFloat(float)"><!-- --></A><H3>
writeFloat</H3>
<PRE>
public final <A HREF="../../../../com/trolltech/qt/core/QDataStream.html" title="class in com.trolltech.qt.core">QDataStream</A> <B>writeFloat</B>(float&nbsp;f)</PRE>
<DL>
<DD><p>Writes a 32-bit floating point number, <tt>f</tt>, to the stream using the standard IEEE 754 format. Returns a reference to the stream.</p>
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="writeInt(int)"><!-- --></A><H3>
writeInt</H3>
<PRE>
public final <A HREF="../../../../com/trolltech/qt/core/QDataStream.html" title="class in com.trolltech.qt.core">QDataStream</A> <B>writeInt</B>(int&nbsp;i)</PRE>
<DL>
<DD><p>Writes a signed 32-bit integer, <tt>i</tt>, to the stream and returns a reference to the stream.</p>
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="writeBoolean(boolean)"><!-- --></A><H3>
writeBoolean</H3>
<PRE>
public final <A HREF="../../../../com/trolltech/qt/core/QDataStream.html" title="class in com.trolltech.qt.core">QDataStream</A> <B>writeBoolean</B>(boolean&nbsp;i)</PRE>
<DL>
<DD><p>Writes a boolean value, <tt>i</tt>, to the stream. Returns a reference to the stream.</p>
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="writeLong(long)"><!-- --></A><H3>
writeLong</H3>
<PRE>
public final <A HREF="../../../../com/trolltech/qt/core/QDataStream.html" title="class in com.trolltech.qt.core">QDataStream</A> <B>writeLong</B>(long&nbsp;i)</PRE>
<DL>
<DD><p>Writes a signed 64-bit integer, <tt>i</tt>, to the stream and returns a reference to the stream.</p>
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="writeByte(byte)"><!-- --></A><H3>
writeByte</H3>
<PRE>
public final <A HREF="../../../../com/trolltech/qt/core/QDataStream.html" title="class in com.trolltech.qt.core">QDataStream</A> <B>writeByte</B>(byte&nbsp;i)</PRE>
<DL>
<DD>Writes the byte <tt>i</tt> to the stream.

<tt>i</tt>
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="writeDouble(double)"><!-- --></A><H3>
writeDouble</H3>
<PRE>
public final <A HREF="../../../../com/trolltech/qt/core/QDataStream.html" title="class in com.trolltech.qt.core">QDataStream</A> <B>writeDouble</B>(double&nbsp;f)</PRE>
<DL>
<DD><p>Writes a 64-bit floating point number, <tt>f</tt>, to the stream using the standard IEEE 754 format. Returns a reference to the stream.</p>
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="resetStatus()"><!-- --></A><H3>
resetStatus</H3>
<PRE>
public final void <B>resetStatus</B>()</PRE>
<DL>
<DD><p>Resets the status of the data stream.</p>
<P>
<DD><DL>
<DT><B>See Also:</B><DD><a href="QDataStream.html#Status-enum">Status</tt></a>, 
<a href="QDataStream.html#status()"><tt>status</tt></a>, 
<a href="QDataStream.html#setStatus(com.trolltech.qt.core.QDataStream.Status)"><tt>setStatus</tt></a></DL>
</DD>
</DL>
<HR>

<A NAME="setDevice(com.trolltech.qt.core.QIODevice)"><!-- --></A><H3>
setDevice</H3>
<PRE>
public final void <B>setDevice</B>(<A HREF="../../../../com/trolltech/qt/core/QIODevice.html" title="class in com.trolltech.qt.core">QIODevice</A>&nbsp;arg__1)</PRE>
<DL>
<DD><p>void QDataStream::setDevice(<a href="QIODevice.html"><tt>QIODevice</tt></a> *d)</p>
<p>Sets the I/O device to <tt>arg__1</tt>.</p>
<P>
<DD><DL>
<DT><B>See Also:</B><DD><a href="QDataStream.html#device()"><tt>device</tt></a>, 
<a href="QDataStream.html#unsetDevice()"><tt>unsetDevice</tt></a></DL>
</DD>
</DL>
<HR>

<A NAME="setStatus(com.trolltech.qt.core.QDataStream.Status)"><!-- --></A><H3>
setStatus</H3>
<PRE>
public final void <B>setStatus</B>(<A HREF="../../../../com/trolltech/qt/core/QDataStream.Status.html" title="enum in com.trolltech.qt.core">QDataStream.Status</A>&nbsp;status)</PRE>
<DL>
<DD><p>Sets the status of the data stream to the <tt>status</tt> given.</p>
<P>
<DD><DL>
<DT><B>See Also:</B><DD><a href="QDataStream.html#Status-enum">Status</tt></a>, 
<a href="QDataStream.html#status()"><tt>status</tt></a>, 
<a href="QDataStream.html#resetStatus()"><tt>resetStatus</tt></a></DL>
</DD>
</DL>
<HR>

<A NAME="setVersion(int)"><!-- --></A><H3>
setVersion</H3>
<PRE>
public final void <B>setVersion</B>(int&nbsp;arg__1)</PRE>
<DL>
<DD><p>Sets the version number of the data serialization format to <tt>arg__1</tt>.</p>
<p>You don't <i>have</i> to set a version if you are using the current version of Qt, but for your own custom binary formats we recommend that you do; see <a href="QDataStream.html#versioning">Versioning</tt></a> in the Detailed Description.</p>
<p>In order to accommodate new functionality, the datastream serialization format of some Qt classes has changed in some versions of Qt. If you want to read data that was created by an earlier version of Qt, or write data that can be read by a program that was compiled with an earlier version of Qt, use this function to modify the serialization format used by <a href="QDataStream.html#QDataStream()"><tt>QDataStream</tt></a>.</p>
<p><table align="center" cellpadding="2" cellspacing="1" border="0">
<thead><tr valign="top" class="qt-style"><th>Qt Version</th><th><a href="QDataStream.html#QDataStream()"><tt>QDataStream</tt></a> Version</th></tr></thead>
<tr valign="top" class="odd"><td>Qt 4.2</td><td>8</td></tr>
<tr valign="top" class="even"><td>Qt 4.0</td><td>7</td></tr>
<tr valign="top" class="odd"><td>Qt 3.3</td><td>6</td></tr>
<tr valign="top" class="even"><td>Qt 3.1, 3.2</td><td>5</td></tr>
<tr valign="top" class="odd"><td>Qt 3.0</td><td>4</td></tr>
<tr valign="top" class="even"><td>Qt 2.1, 2.2, 2.3</td><td>3</td></tr>
<tr valign="top" class="odd"><td>Qt 2.0</td><td>2</td></tr>
<tr valign="top" class="even"><td>Qt 1.x</td><td>1</td></tr>
</table></p>
<p>The <a href="QDataStream.html#Version-enum">Version</tt></a> enum provides symbolic constants for the different versions of Qt. For example:</p>
<pre>    QDataStream out(file);
    out.setVersion(QDataStream::Qt_4_0);</pre>
<P>
<DD><DL>
<DT><B>See Also:</B><DD><a href="QDataStream.html#version()"><tt>version</tt></a>, 
<a href="QDataStream.html#Version-enum">Version</tt></a></DL>
</DD>
</DL>
<HR>

<A NAME="skipRawData(int)"><!-- --></A><H3>
skipRawData</H3>
<PRE>
public final int <B>skipRawData</B>(int&nbsp;len)</PRE>
<DL>
<DD><p>Skips <tt>len</tt> bytes from the device. Returns the number of bytes actually skipped, or -1 on error.</p>
<p>This is equivalent to calling readRawData() on a buffer of length <tt>len</tt> and ignoring the buffer.</p>
<P>
<DD><DL>
<DT><B>See Also:</B><DD><tt>QIODevice::seek</tt></DL>
</DD>
</DL>
<HR>

<A NAME="status()"><!-- --></A><H3>
status</H3>
<PRE>
public final <A HREF="../../../../com/trolltech/qt/core/QDataStream.Status.html" title="enum in com.trolltech.qt.core">QDataStream.Status</A> <B>status</B>()</PRE>
<DL>
<DD><p>Returns the status of the data stream.</p>
<P>
<DD><DL>
<DT><B>See Also:</B><DD><a href="QDataStream.html#Status-enum">Status</tt></a>, 
<a href="QDataStream.html#setStatus(com.trolltech.qt.core.QDataStream.Status)"><tt>setStatus</tt></a>, 
<a href="QDataStream.html#resetStatus()"><tt>resetStatus</tt></a></DL>
</DD>
</DL>
<HR>

<A NAME="unsetDevice()"><!-- --></A><H3>
unsetDevice</H3>
<PRE>
public final void <B>unsetDevice</B>()</PRE>
<DL>
<DD><p>Unsets the I/O device. This is the same as calling <a href="QDataStream.html#setDevice(com.trolltech.qt.core.QIODevice)"><tt>setDevice</tt></a>(0).</p>
<P>
<DD><DL>
<DT><B>See Also:</B><DD><a href="QDataStream.html#device()"><tt>device</tt></a>, 
<a href="QDataStream.html#setDevice(com.trolltech.qt.core.QIODevice)"><tt>setDevice</tt></a></DL>
</DD>
</DL>
<HR>

<A NAME="version()"><!-- --></A><H3>
version</H3>
<PRE>
public final int <B>version</B>()</PRE>
<DL>
<DD><p>Returns the version number of the data serialization format.</p>
<P>
<DD><DL>
<DT><B>See Also:</B><DD><a href="QDataStream.html#setVersion(int)"><tt>setVersion</tt></a>, 
<a href="QDataStream.html#Version-enum">Version</tt></a></DL>
</DD>
</DL>
<HR>

<A NAME="fromNativePointer(com.trolltech.qt.QNativePointer)"><!-- --></A><H3>
fromNativePointer</H3>
<PRE>
public static <A HREF="../../../../com/trolltech/qt/core/QDataStream.html" title="class in com.trolltech.qt.core">QDataStream</A> <B>fromNativePointer</B>(<A HREF="../../../../com/trolltech/qt/QNativePointer.html" title="class in com.trolltech.qt">QNativePointer</A>&nbsp;nativePointer)</PRE>
<DL>
<DD>This function returns the QDataStream instance pointed to by nativePointer
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>nativePointer</CODE> - the QNativePointer of which object should be returned.</DL>
</DD>
</DL>
<HR>

<A NAME="readBoolean()"><!-- --></A><H3>
readBoolean</H3>
<PRE>
public final boolean <B>readBoolean</B>()</PRE>
<DL>
<DD>This function reads a boolean from the stream.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="readByte()"><!-- --></A><H3>
readByte</H3>
<PRE>
public final byte <B>readByte</B>()</PRE>
<DL>
<DD>This function read a byte from the stream.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="readShort()"><!-- --></A><H3>
readShort</H3>
<PRE>
public final short <B>readShort</B>()</PRE>
<DL>
<DD>This function reads a short from the stream.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="readInt()"><!-- --></A><H3>
readInt</H3>
<PRE>
public final int <B>readInt</B>()</PRE>
<DL>
<DD>This function reads an int from the stream.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="readLong()"><!-- --></A><H3>
readLong</H3>
<PRE>
public final long <B>readLong</B>()</PRE>
<DL>
<DD>This function reads a long from the stream.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="readFloat()"><!-- --></A><H3>
readFloat</H3>
<PRE>
public final float <B>readFloat</B>()</PRE>
<DL>
<DD>This function reads a float from the stream.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="readDouble()"><!-- --></A><H3>
readDouble</H3>
<PRE>
public final double <B>readDouble</B>()</PRE>
<DL>
<DD>This function read a double from the stream.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="writeShort(short)"><!-- --></A><H3>
writeShort</H3>
<PRE>
public final <A HREF="../../../../com/trolltech/qt/core/QDataStream.html" title="class in com.trolltech.qt.core">QDataStream</A> <B>writeShort</B>(short&nbsp;s)</PRE>
<DL>
<DD>This function writes the short <tt>s/tt> to the stream. It returns a reference to
the stream after it has been read from.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="readString()"><!-- --></A><H3>
readString</H3>
<PRE>
public final java.lang.String <B>readString</B>()</PRE>
<DL>
<DD>This function reads a string from the stream.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="writeString(java.lang.String)"><!-- --></A><H3>
writeString</H3>
<PRE>
public final void <B>writeString</B>(java.lang.String&nbsp;string)</PRE>
<DL>
<DD>This function writes the short <tt>s/tt> to the stream. It returns a reference to
the stream after it has been read from.

<tt>string</tt>
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="writeBytes(byte[])"><!-- --></A><H3>
writeBytes</H3>
<PRE>
public final int <B>writeBytes</B>(byte[]&nbsp;buffer)</PRE>
<DL>
<DD>This function writes the bytes in <tt>buffer</tt> to the stream. It
returns a reference to the stream after it has been read from.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="writeBytes(byte[], int)"><!-- --></A><H3>
writeBytes</H3>
<PRE>
public final int <B>writeBytes</B>(byte[]&nbsp;buffer,
                            int&nbsp;length)</PRE>
<DL>
<DD>This function writes the <tt>length</tt> bytes of <tt>buffer</tt> to
the stream. It returns a reference to the stream after it has been
read from.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="readBytes(byte[])"><!-- --></A><H3>
readBytes</H3>
<PRE>
public final int <B>readBytes</B>(byte[]&nbsp;buffer)</PRE>
<DL>
<DD>This function reads bytes from the stream into <tt>buffer</tt>. It
returns a reference to the stream after it has been read from.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="readBytes(byte[], int)"><!-- --></A><H3>
readBytes</H3>
<PRE>
public final int <B>readBytes</B>(byte[]&nbsp;buffer,
                           int&nbsp;length)</PRE>
<DL>
<DD>This function reads <tt>length</tt> bytes from the stream into
<tt>buffer</tt>. It returns a reference to the stream after it has
been read from.
<P>
<DD><DL>
</DL>
</DD>
</DL>
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