uTools-Manuals/docs/java/javax/imageio/stream/FileCacheImageOutputStream.html

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     javax.imageio.stream 
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<h2 class="title" title="Class FileCacheImageOutputStream">Class FileCacheImageOutputStream</h2>
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<li><a href="../../../java/lang/Object.html" title="class in java.lang">java.lang.Object</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html" title="class in javax.imageio.stream">javax.imageio.stream.ImageInputStreamImpl</a></li>
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<ul class="inheritance">
<li><a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html" title="class in javax.imageio.stream">javax.imageio.stream.ImageOutputStreamImpl</a></li>
<li>
<ul class="inheritance">
<li>javax.imageio.stream.FileCacheImageOutputStream</li>
</ul> </li>
</ul> </li>
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<dl>
<dt>
         All Implemented Interfaces: 
       </dt>
<dd>
<span><a href="../../../java/io/Closeable.html" title="java.io中的接口">Closeable</a> ， <a href="../../../java/io/DataInput.html" title="java.io中的接口">DataInput</a> ， <a href="../../../java/io/DataOutput.html" title="java.io中的接口">DataOutput</a> ， <a href="../../../java/lang/AutoCloseable.html" title="java.lang中的接口">AutoCloseable</a> ， <a href="../../../javax/imageio/stream/ImageInputStream.html" title="javax.imageio.stream中的接口">ImageInputStream</a> ， <a href="../../../javax/imageio/stream/ImageOutputStream.html" title="javax.imageio.stream中的接口">ImageOutputStream</a></span>
</dd>
</dl>
<hr/> <br/> <pre>public class <span class="typeNameLabel">FileCacheImageOutputStream</span>
extends <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html" title="class in javax.imageio.stream">ImageOutputStreamImpl</a></pre>
<div class="block">
<span>ImageOutputStream的一个<code>ImageOutputStream</code> ，将其输出写入常规的<code>OutputStream</code> 。</span>
<span>一个文件用于缓存数据，直到它被刷新到输出流。</span>
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<!-- --> </a> <h3>Fields inherited from class javax.imageio.stream.<a href="../../../javax/imageio/stream/ImageInputStreamImpl.html" title="class in javax.imageio.stream">ImageInputStreamImpl</a></h3> <code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#bitOffset">bitOffset</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#byteOrder">byteOrder</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#flushedPos">flushedPos</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#streamPos">streamPos</a></code></li>
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<caption>
<span>构造方法</span>
<span class="tabEnd"> </span>
</caption>
<tbody>
<tr>
<th class="colOne" scope="col">Constructor and Description</th>
</tr>
<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../javax/imageio/stream/FileCacheImageOutputStream.html#FileCacheImageOutputStream-java.io.OutputStream-java.io.File-">FileCacheImageOutputStream</a></span>(<a href="../../../java/io/OutputStream.html" title="class in java.io">OutputStream</a> stream, <a href="../../../java/io/File.html" title="class in java.io">File</a> cacheDir)</code>
<div class="block">
              构造一个 
             <code>FileCacheImageOutputStream</code> ，它将写入给定的 
             <code>outputStream</code> 。 
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<caption>
<span class="activeTableTab" id="t0"><span>所有方法</span><span class="tabEnd"> </span></span>
<span class="tableTab" id="t2"><span><a href="javascript:show(2);">接口方法</a></span><span class="tabEnd"> </span></span>
<span class="tableTab" id="t4"><span><a href="javascript:show(8);">具体的方法</a></span><span class="tabEnd"> </span></span>
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<tbody>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/imageio/stream/FileCacheImageOutputStream.html#close--">close</a></span>()</code>
<div class="block">
              关闭此 
             <code>FileCacheImageOutputStream</code> 。 
            </div> </td>
</tr>
<tr class="rowColor" id="i1">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/imageio/stream/FileCacheImageOutputStream.html#flushBefore-long-">flushBefore</a></span>(long pos)</code>
<div class="block">
              在指示的位置之前丢弃流的初始部分。 
            </div> </td>
</tr>
<tr class="altColor" id="i2">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/imageio/stream/FileCacheImageOutputStream.html#isCached--">isCached</a></span>()</code>
<div class="block">
              返回 
             <code>true</code>因为这 
             <code>ImageOutputStream</code>缓存数据以允许向后搜索。 
            </div> </td>
</tr>
<tr class="rowColor" id="i3">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/imageio/stream/FileCacheImageOutputStream.html#isCachedFile--">isCachedFile</a></span>()</code>
<div class="block">
              返回 
             <code>true</code>因为这个 
             <code>ImageOutputStream</code>维护一个文件缓存。 
            </div> </td>
</tr>
<tr class="altColor" id="i4">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/imageio/stream/FileCacheImageOutputStream.html#isCachedMemory--">isCachedMemory</a></span>()</code>
<div class="block">
              返回 
             <code>false</code>因为这 
             <code>ImageOutputStream</code>不维护主内存缓存。 
            </div> </td>
</tr>
<tr class="rowColor" id="i5">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/imageio/stream/FileCacheImageOutputStream.html#length--">length</a></span>()</code>
<div class="block">
              返回 
             <code>-1L</code>以表示该流具有未知长度。 
            </div> </td>
</tr>
<tr class="altColor" id="i6">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/imageio/stream/FileCacheImageOutputStream.html#read--">read</a></span>()</code>
<div class="block">
              从流中读取一个字节，并将其作为0和255之间的 
             <code>int</code>返回。 
            </div> </td>
</tr>
<tr class="rowColor" id="i7">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/imageio/stream/FileCacheImageOutputStream.html#read-byte:A-int-int-">read</a></span>(byte[] b, int off, int len)</code>
<div class="block">
              读取到 
             <code>len</code>从流字节，并将其存储到 
             <code>b</code>开始于索引 
             <code>off</code> 。 
            </div> </td>
</tr>
<tr class="altColor" id="i8">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/imageio/stream/FileCacheImageOutputStream.html#seek-long-">seek</a></span>(long pos)</code>
<div class="block">
              设置当前流位置，并将位偏移重置为0。 
            </div> </td>
</tr>
<tr class="rowColor" id="i9">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/imageio/stream/FileCacheImageOutputStream.html#write-byte:A-int-int-">write</a></span>(byte[] b, int off, int len)</code>
<div class="block">
              在当前位置写入一串字节。 
            </div> </td>
</tr>
<tr class="altColor" id="i10">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/imageio/stream/FileCacheImageOutputStream.html#write-int-">write</a></span>(int b)</code>
<div class="block">
              将当前位置的单个字节写入流。 
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<!-- --> </a> <h3>Methods inherited from class javax.imageio.stream.<a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html" title="class in javax.imageio.stream">ImageOutputStreamImpl</a></h3> <code><a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#flushBits--">flushBits</a>, <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#write-byte:A-">write</a>, <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeBit-int-">writeBit</a>, <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeBits-long-int-">writeBits</a>, <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeBoolean-boolean-">writeBoolean</a>, <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeByte-int-">writeByte</a>, <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeBytes-java.lang.String-">writeBytes</a>, <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeChar-int-">writeChar</a>, <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeChars-char:A-int-int-">writeChars</a>, <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeChars-java.lang.String-">writeChars</a>, <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeDouble-double-">writeDouble</a>, <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeDoubles-double:A-int-int-">writeDoubles</a>, <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeFloat-float-">writeFloat</a>, <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeFloats-float:A-int-int-">writeFloats</a>, <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeInt-int-">writeInt</a>, <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeInts-int:A-int-int-">writeInts</a>, <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeLong-long-">writeLong</a>, <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeLongs-long:A-int-int-">writeLongs</a>, <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeShort-int-">writeShort</a>, <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeShorts-short:A-int-int-">writeShorts</a>, <a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeUTF-java.lang.String-">writeUTF</a></code></li>
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<!-- --> </a> <h3>Methods inherited from class javax.imageio.stream.<a href="../../../javax/imageio/stream/ImageInputStreamImpl.html" title="class in javax.imageio.stream">ImageInputStreamImpl</a></h3> <code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#checkClosed--">checkClosed</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#finalize--">finalize</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#flush--">flush</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#getBitOffset--">getBitOffset</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#getByteOrder--">getByteOrder</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#getFlushedPosition--">getFlushedPosition</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#getStreamPosition--">getStreamPosition</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#mark--">mark</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#read-byte:A-">read</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readBit--">readBit</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readBits-int-">readBits</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readBoolean--">readBoolean</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readByte--">readByte</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readBytes-javax.imageio.stream.IIOByteBuffer-int-">readBytes</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readChar--">readChar</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readDouble--">readDouble</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readFloat--">readFloat</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully-byte:A-">readFully</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully-byte:A-int-int-">readFully</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully-char:A-int-int-">readFully</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully-double:A-int-int-">readFully</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully-float:A-int-int-">readFully</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully-int:A-int-int-">readFully</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully-long:A-int-int-">readFully</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully-short:A-int-int-">readFully</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readInt--">readInt</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readLine--">readLine</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readLong--">readLong</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readShort--">readShort</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readUnsignedByte--">readUnsignedByte</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readUnsignedInt--">readUnsignedInt</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readUnsignedShort--">readUnsignedShort</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#readUTF--">readUTF</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#reset--">reset</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#setBitOffset-int-">setBitOffset</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#setByteOrder-java.nio.ByteOrder-">setByteOrder</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#skipBytes-int-">skipBytes</a>, <a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#skipBytes-long-">skipBytes</a></code></li>
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<!-- --> </a> <h3>Methods inherited from interface javax.imageio.stream.<a href="../../../javax/imageio/stream/ImageInputStream.html" title="interface in javax.imageio.stream">ImageInputStream</a></h3> <code><a href="../../../javax/imageio/stream/ImageInputStream.html#flush--">flush</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#getBitOffset--">getBitOffset</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#getByteOrder--">getByteOrder</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#getFlushedPosition--">getFlushedPosition</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#getStreamPosition--">getStreamPosition</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#mark--">mark</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#read-byte:A-">read</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readBit--">readBit</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readBits-int-">readBits</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readBoolean--">readBoolean</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readByte--">readByte</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readBytes-javax.imageio.stream.IIOByteBuffer-int-">readBytes</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readChar--">readChar</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readDouble--">readDouble</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readFloat--">readFloat</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readFully-byte:A-">readFully</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readFully-byte:A-int-int-">readFully</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readFully-char:A-int-int-">readFully</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readFully-double:A-int-int-">readFully</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readFully-float:A-int-int-">readFully</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readFully-int:A-int-int-">readFully</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readFully-long:A-int-int-">readFully</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readFully-short:A-int-int-">readFully</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readInt--">readInt</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readLine--">readLine</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readLong--">readLong</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readShort--">readShort</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readUnsignedByte--">readUnsignedByte</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readUnsignedInt--">readUnsignedInt</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readUnsignedShort--">readUnsignedShort</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#readUTF--">readUTF</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#reset--">reset</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#setBitOffset-int-">setBitOffset</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#setByteOrder-java.nio.ByteOrder-">setByteOrder</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#skipBytes-int-">skipBytes</a>, <a href="../../../javax/imageio/stream/ImageInputStream.html#skipBytes-long-">skipBytes</a></code></li>
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<li class="blockList"> <h4>FileCacheImageOutputStream</h4> <pre>public FileCacheImageOutputStream(<a href="../../../java/io/OutputStream.html" title="class in java.io">OutputStream</a> stream,
                                  <a href="../../../java/io/File.html" title="class in java.io">File</a> cacheDir)
                           throws <a href="../../../java/io/IOException.html" title="class in java.io">IOException</a></pre>
<div class="block">
<span>构造一个<code>FileCacheImageOutputStream</code> ，它将写入给定的<code>outputStream</code> 。</span>
<p> <span>临时文件用作缓存。</span> <span>如果<code>cacheDir</code>是非<code>null</code>并且是一个目录，那么该文件将在那里创建。</span> <span>如果是<code>null</code> ，将使用系统相关的默认临时文件目录（有关详细信息，请参阅File.createTempFile的<code>File.createTempFile</code> ）。</span> </p>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>stream</code> - 
            <code>OutputStream</code> 。 
           </dd>
<dd>
<code>cacheDir</code> - 一个 
            <code>File</code>指示应该创建缓存文件的位置，或者使用 
            <code>null</code>来使用系统目录。 
           </dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../java/lang/IllegalArgumentException.html" title="class in java.lang">IllegalArgumentException</a></code> - 如果 
            <code>stream</code>是 
            <code>null</code> 。 
           </dd>
<dd>
<code><a href="../../../java/lang/IllegalArgumentException.html" title="class in java.lang">IllegalArgumentException</a></code> - 如果 
            <code>cacheDir</code>不是 
            <code>null</code>但不是目录。 
           </dd>
<dd>
<code><a href="../../../java/io/IOException.html" title="class in java.io">IOException</a></code> - 如果无法创建缓存文件。 
           </dd>
</dl> </li>
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<li class="blockList"> <h4>read</h4> <pre>public int read()
         throws <a href="../../../java/io/IOException.html" title="class in java.io">IOException</a></pre>
<div class="block">
<span class="descfrmTypeLabel">描述从类别复制： <code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#read--">ImageInputStreamImpl</a></code></span>
</div>
<div class="block">
<span>从该流读取单个字节，并返回它作为一个<code>int</code> 255之间0和如果达到EOF， <code>-1</code>被返回。</span>
<p> <span>子类必须为此方法提供一个实现。</span> <span>子类实现应该在退出之前更新流位置。</span> </p>
<p> <span>在发生读取之前，流内的位偏移必须重置为零。</span> </p>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageInputStream.html#read--">read</a></code>在接口 
            <code><a href="../../../javax/imageio/stream/ImageInputStream.html" title="interface in javax.imageio.stream">ImageInputStream</a></code>
</dd>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#read--">read</a></code>在 
            <code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html" title="class in javax.imageio.stream">ImageInputStreamImpl</a></code>
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             流中下一个字节的值，如果达到EOF， 
            <code>-1</code> 。 
           </dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../java/io/IOException.html" title="class in java.io">IOException</a></code> - 如果流已关闭。 
           </dd>
</dl> </li>
</ul> <a name="read-byte:A-int-int-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>read</h4> <pre>public int read(byte[] b,
                int off,
                int len)
         throws <a href="../../../java/io/IOException.html" title="class in java.io">IOException</a></pre>
<div class="block">
<span class="descfrmTypeLabel">描述从类别复制： <code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#read-byte:A-int-int-">ImageInputStreamImpl</a></code></span>
</div>
<div class="block">
<span>读取到<code>len</code>从流字节，并将其存储到<code>b</code>开始于索引<code>off</code> 。</span>
<span>如果没有字节可以读取，因为已经到达流的末尾，则返回<code>-1</code> 。</span>
<p> <span>在发生读取之前，流内的位偏移必须重置为零。</span> </p>
<p> <span>子类必须为此方法提供一个实现。</span> <span>子类实现应该在退出之前更新流位置。</span> </p>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageInputStream.html#read-byte:A-int-int-">read</a></code>在接口 
            <code><a href="../../../javax/imageio/stream/ImageInputStream.html" title="interface in javax.imageio.stream">ImageInputStream</a></code>
</dd>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#read-byte:A-int-int-">read</a></code>在 
            <code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html" title="class in javax.imageio.stream">ImageInputStreamImpl</a></code>类 
           </dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>b</code> - 要写入的字节数组。 
           </dd>
<dd>
<code>off</code> - 
            <code>b</code>内写入的起始位置。 
           </dd>
<dd>
<code>len</code> - 要读取的最大字节数。 
           </dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             实际读取的字节数，或 
            <code>-1</code>表示EOF。 
           </dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../java/io/IOException.html" title="class in java.io">IOException</a></code> - 如果发生I / O错误。 
           </dd>
</dl> </li>
</ul> <a name="write-int-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>write</h4> <pre>public void write(int b)
           throws <a href="../../../java/io/IOException.html" title="class in java.io">IOException</a></pre>
<div class="block">
<span class="descfrmTypeLabel">说明从界面： <code><a href="../../../javax/imageio/stream/ImageOutputStream.html#write-int-">ImageOutputStream</a></code>复制</span>
</div>
<div class="block">
<span>将当前位置的单个字节写入流。</span>
<span><code>b</code>的24位<code>b</code>被忽略。</span>
<p> <span>如果流内的位偏移量不为零，则当前字节的剩余部分用0填充并首先写出。</span> <span>写入后位偏移将为0。</span> <span>实施者可以使用<a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#flushBits--"><code>flushBits</code></a>的方法<a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html" title="javax.imageio.stream中的类"><code>ImageOutputStreamImpl</code></a>保证这一点。</span> </p>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../java/io/DataOutput.html#write-int-">write</a></code>在接口 
            <code><a href="../../../java/io/DataOutput.html" title="interface in java.io">DataOutput</a></code>
</dd>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageOutputStream.html#write-int-">write</a></code>在接口 
            <code><a href="../../../javax/imageio/stream/ImageOutputStream.html" title="interface in javax.imageio.stream">ImageOutputStream</a></code>
</dd>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#write-int-">write</a></code>在 
            <code><a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html" title="class in javax.imageio.stream">ImageOutputStreamImpl</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>b</code> - 要写入低8位的 
            <code>int</code> 。 
           </dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../java/io/IOException.html" title="class in java.io">IOException</a></code> - 如果发生I / O错误。 
           </dd>
</dl> </li>
</ul> <a name="write-byte:A-int-int-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>write</h4> <pre>public void write(byte[] b,
                  int off,
                  int len)
           throws <a href="../../../java/io/IOException.html" title="class in java.io">IOException</a></pre>
<div class="block">
<span class="descfrmTypeLabel">描述从接口： <code><a href="../../../javax/imageio/stream/ImageOutputStream.html#write-byte:A-int-int-">ImageOutputStream</a></code>复制</span>
</div>
<div class="block">
<span>在当前位置写入一串字节。</span>
<span>如果<code>len</code>为0，则不写任何内容。</span>
<span>字节<code>b[off]</code>先写，然后字节<code>b[off + 1]</code>等等。</span>
<p> <span>如果流内的位偏移量不为零，则当前字节的剩余部分用0填充并首先写出。</span> <span>写入后位偏移将为0。</span> <span>实施者可以使用<a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#flushBits--"><code>flushBits</code></a>的方法<a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html" title="javax.imageio.stream中的类"><code>ImageOutputStreamImpl</code></a>保证这一点。</span> </p>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../java/io/DataOutput.html#write-byte:A-int-int-">write</a></code>在接口 
            <code><a href="../../../java/io/DataOutput.html" title="interface in java.io">DataOutput</a></code>
</dd>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageOutputStream.html#write-byte:A-int-int-">write</a></code>在接口 
            <code><a href="../../../javax/imageio/stream/ImageOutputStream.html" title="interface in javax.imageio.stream">ImageOutputStream</a></code>
</dd>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html#write-byte:A-int-int-">write</a></code>在 
            <code><a href="../../../javax/imageio/stream/ImageOutputStreamImpl.html" title="class in javax.imageio.stream">ImageOutputStreamImpl</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>b</code> - 要编写的 
            <code>byte</code>的数组。 
           </dd>
<dd>
<code>off</code> - 数据中的起始偏移量。 
           </dd>
<dd>
<code>len</code> -数量 
            <code>byte</code> s到写。 
           </dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../java/io/IOException.html" title="class in java.io">IOException</a></code> - 如果发生I / O错误。 
           </dd>
</dl> </li>
</ul> <a name="length--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>length</h4> <pre>public long length()</pre>
<div class="block">
<span class="descfrmTypeLabel">描述从类别复制： <code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#length--">ImageInputStreamImpl</a></code></span>
</div>
<div class="block">
<span>返回<code>-1L</code>以表示该流具有未知长度。</span>
<span>子类必须覆盖此方法以提供实际的长度信息。</span>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageInputStream.html#length--">length</a></code>在接口 
            <code><a href="../../../javax/imageio/stream/ImageInputStream.html" title="interface in javax.imageio.stream">ImageInputStream</a></code>
</dd>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#length--">length</a></code>在 
            <code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html" title="class in javax.imageio.stream">ImageInputStreamImpl</a></code>类 
           </dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             -1L表示未知长度。 
           </dd>
</dl> </li>
</ul> <a name="seek-long-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>seek</h4> <pre>public void seek(long pos)
          throws <a href="../../../java/io/IOException.html" title="class in java.io">IOException</a></pre>
<div class="block">
<span>设置当前流位置，并将位偏移量重置为0.合法查找文件的结尾;</span>
<span>一个<code>EOFException</code>会，如果执行读取只抛出。</span>
<span>在执行写入之前，文件长度不会增加。</span>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageInputStream.html#seek-long-">seek</a></code>在接口 
            <code><a href="../../../javax/imageio/stream/ImageInputStream.html" title="interface in javax.imageio.stream">ImageInputStream</a></code>
</dd>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#seek-long-">seek</a></code>在 
            <code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html" title="class in javax.imageio.stream">ImageInputStreamImpl</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>pos</code> - 一个 
            <code>long</code>所需文件指针位置的long。 
           </dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../java/lang/IndexOutOfBoundsException.html" title="class in java.lang">IndexOutOfBoundsException</a></code> - 如果 
            <code>pos</code>小于冲洗位置。 
           </dd>
<dd>
<code><a href="../../../java/io/IOException.html" title="class in java.io">IOException</a></code> - 如果发生任何其他I / O错误。 
           </dd>
</dl> </li>
</ul> <a name="isCached--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>isCached</h4> <pre>public boolean isCached()</pre>
<div class="block">
            返回 
           <code>true</code>因为这 
           <code>ImageOutputStream</code>缓存数据，以便向后追溯。 
          </div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageInputStream.html#isCached--">isCached</a></code>在接口 
            <code><a href="../../../javax/imageio/stream/ImageInputStream.html" title="interface in javax.imageio.stream">ImageInputStream</a></code>
</dd>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#isCached--">isCached</a></code>在 
            <code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html" title="class in javax.imageio.stream">ImageInputStreamImpl</a></code>
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
<code>true</code> 。 
           </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../../javax/imageio/stream/FileCacheImageOutputStream.html#isCachedMemory--"><code>isCachedMemory()</code></a> ， 
            <a href="../../../javax/imageio/stream/FileCacheImageOutputStream.html#isCachedFile--"><code>isCachedFile()</code></a>
</dd>
</dl> </li>
</ul> <a name="isCachedFile--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>isCachedFile</h4> <pre>public boolean isCachedFile()</pre>
<div class="block">
            返回 
           <code>true</code>因为这 
           <code>ImageOutputStream</code>维护一个文件缓存。 
          </div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageInputStream.html#isCachedFile--">isCachedFile</a></code>在接口 
            <code><a href="../../../javax/imageio/stream/ImageInputStream.html" title="interface in javax.imageio.stream">ImageInputStream</a></code>
</dd>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#isCachedFile--">isCachedFile</a></code>在 
            <code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html" title="class in javax.imageio.stream">ImageInputStreamImpl</a></code>
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
<code>true</code> 。 
           </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../../javax/imageio/stream/FileCacheImageOutputStream.html#isCached--"><code>isCached()</code></a> ， 
            <a href="../../../javax/imageio/stream/FileCacheImageOutputStream.html#isCachedMemory--"><code>isCachedMemory()</code></a>
</dd>
</dl> </li>
</ul> <a name="isCachedMemory--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>isCachedMemory</h4> <pre>public boolean isCachedMemory()</pre>
<div class="block">
            返回 
           <code>false</code>因为此 
           <code>ImageOutputStream</code>不维护主内存缓存。 
          </div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageInputStream.html#isCachedMemory--">isCachedMemory</a></code>中的 
            <code><a href="../../../javax/imageio/stream/ImageInputStream.html" title="interface in javax.imageio.stream">ImageInputStream</a></code>
</dd>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#isCachedMemory--">isCachedMemory</a></code>在 
            <code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html" title="class in javax.imageio.stream">ImageInputStreamImpl</a></code>
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
<code>false</code> 。 
           </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../../javax/imageio/stream/FileCacheImageOutputStream.html#isCached--"><code>isCached()</code></a> ， 
            <a href="../../../javax/imageio/stream/FileCacheImageOutputStream.html#isCachedFile--"><code>isCachedFile()</code></a>
</dd>
</dl> </li>
</ul> <a name="close--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>close</h4> <pre>public void close()
           throws <a href="../../../java/io/IOException.html" title="class in java.io">IOException</a></pre>
<div class="block">
<span>关闭此<code>FileCacheImageOutputStream</code> 。</span>
<span>所有挂起的数据都被刷新到输出，缓存文件被关闭并被删除。</span>
<span>目的地<code>OutputStream</code>未关闭。</span>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../java/io/Closeable.html#close--">close</a></code>在接口 
            <code><a href="../../../java/io/Closeable.html" title="interface in java.io">Closeable</a></code>
</dd>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../java/lang/AutoCloseable.html#close--">close</a></code>在接口 
            <code><a href="../../../java/lang/AutoCloseable.html" title="interface in java.lang">AutoCloseable</a></code>
</dd>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageInputStream.html#close--">close</a></code>在接口 
            <code><a href="../../../javax/imageio/stream/ImageInputStream.html" title="interface in javax.imageio.stream">ImageInputStream</a></code>
</dd>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#close--">close</a></code>在 
            <code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html" title="class in javax.imageio.stream">ImageInputStreamImpl</a></code>
</dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../java/io/IOException.html" title="class in java.io">IOException</a></code> - 如果发生错误。 
           </dd>
</dl> </li>
</ul> <a name="flushBefore-long-">
<!-- --> </a>
<ul class="blockListLast">
<li class="blockList"> <h4>flushBefore</h4> <pre>public void flushBefore(long pos)
                 throws <a href="../../../java/io/IOException.html" title="class in java.io">IOException</a></pre>
<div class="block">
<span class="descfrmTypeLabel">从接口复制： <code><a href="../../../javax/imageio/stream/ImageInputStream.html#flushBefore-long-">ImageInputStream</a></code></span>
</div>
<div class="block">
<span>在指示的位置之前丢弃流的初始部分。</span>
<span>试图寻求在流的冲洗部分内的偏移将导致<code>IndexOutOfBoundsException</code> 。</span>
<p> <span>调用<code>flushBefore</code>可能允许实现此接口的类释放用于存储流中的数据的资源（如内存或磁盘空间）。</span> </p>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageInputStream.html#flushBefore-long-">flushBefore</a></code>在接口 
            <code><a href="../../../javax/imageio/stream/ImageInputStream.html" title="interface in javax.imageio.stream">ImageInputStream</a></code>
</dd>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageOutputStream.html#flushBefore-long-">flushBefore</a></code>中的 
            <code><a href="../../../javax/imageio/stream/ImageOutputStream.html" title="interface in javax.imageio.stream">ImageOutputStream</a></code>
</dd>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html#flushBefore-long-">flushBefore</a></code>在 
            <code><a href="../../../javax/imageio/stream/ImageInputStreamImpl.html" title="class in javax.imageio.stream">ImageInputStreamImpl</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>pos</code> - 一个 
            <code>long</code>其中包含可能被刷新的流前缀的长度。 
           </dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../java/io/IOException.html" title="class in java.io">IOException</a></code> - 如果发生I / O错误。 
           </dd>
</dl> </li>
</ul> </li>
</ul> </li>
</ul>
</div>
</div>