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POEnd Thread that is stuck in a InputStream.read() loop
 

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    <p>I start a cmd application that outputs to System.out through this SyncPipe Runnable:</p> <pre><code>public class SyncPipe implements Runnable { private final InputStream is; private final OutputStream os; public SyncPipe(InputStream is, OutputStream os) { this.is = is; this.os = os; } public void run() { try { final byte[] buffer = new byte[1024]; for ( int length = 0; ( length = is.read(buffer) ) != -1; ) os.write(buffer, 0, length); System.out.print("stopped"); } catch ( Exception ex ) { ex.printStackTrace(); } } } </code></pre> <p>I start RunIt with <code>cmd = "C:/bin/read.exe -f D:/test.jpg"</code></p> <pre><code>private class RunIt implements Runnable { public int p; public String cmd; public RunIt (int p, String cmd) { this.p = p; this.cmd = cmd; } public void run() { ProcessBuilder pb = new ProcessBuilder("cmd"); try { process = pb.start(); (new Thread(new SyncPipe(process.getErrorStream(), System.err))).start(); (new Thread(new SyncPipe(process.getInputStream(), System.out))).start(); OutputStream out = process.getOutputStream(); out.write((cmd + "\r\n").getBytes()); out.flush(); out.close(); try { process.waitFor(); } catch ( InterruptedException e ) { e.printStackTrace(); } println("Stopped using %d.", p); } catch ( IOException ex ) { ex.printStackTrace(); } } } </code></pre> <p>My question now: How can I make <code>(new Thread(new SyncPipe(process.getErrorStream(), System.err)))</code> die? Giving SyncPipe a boolean variable <code>stop</code>, setting it <code>true</code> during runtime, and checking for it via <code>for ( int length = 0; ( length = is.read(buffer) ) != -1 &amp;&amp; !stop; )</code> did not do the trick.</p> <p>Thanks a lot in advance.</p> <hr> <p>I ended up doing the work-around that @Gray suggested. It works now:</p> <pre><code>public void run() { try { final byte[] buffer = new byte[1024]; do if ( is.available() &gt; 0 ) { int length = is.read(buffer); if ( length != -1 ) os.write(buffer, 0, length); else stop = true; } while ( !stop ); } catch ( Exception ex ) { ex.printStackTrace(); } } </code></pre>
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