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    <p>I post you a piece of code which show a way how to solve the problem. As exemple I'm reading a file. You could use this method for another operation, but you need to implements the kill() method so that the main operation will be interrupted.</p> <p>hope it helps</p> <pre><code> import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; /** * Main class * * @author el * */ public class Main { /** * Thread which perform the task which should be timed out. * * @author el * */ public static class MainThread extends Thread { /** * For example reading a file. File to read. */ final private File fileToRead; /** * InputStream from the file. */ final private InputStream myInputStream; /** * Thread for timeout. */ final private TimeOutThread timeOutThread; /** * true if the thread has not ended. */ boolean isRunning = true; /** * true if all tasks where done. */ boolean everythingDone = false; /** * if every thing could not be done, an {@link Exception} may have * Happens. */ Throwable endedWithException = null; /** * Constructor. * * @param file * @throws FileNotFoundException */ MainThread(File file) throws FileNotFoundException { setDaemon(false); fileToRead = file; // open the file stream. myInputStream = new FileInputStream(fileToRead); // Instantiate the timeout thread. timeOutThread = new TimeOutThread(10000, this); } /** * Used by the {@link TimeOutThread}. */ public void kill() { if (isRunning) { isRunning = false; if (myInputStream != null) { try { // close the stream, it may be the problem. myInputStream.close(); } catch (IOException e) { // Not interesting System.out.println(e.toString()); } } synchronized (this) { notify(); } } } /** * The task which should be timed out. */ @Override public void run() { timeOutThread.start(); int bytes = 0; try { // do something while (myInputStream.read() >= 0) { // may block the thread. myInputStream.read(); bytes++; // simulate a slow stream. synchronized (this) { wait(10); } } everythingDone = true; } catch (IOException e) { endedWithException = e; } catch (InterruptedException e) { endedWithException = e; } finally { timeOutThread.kill(); System.out.println("-->read " + bytes + " bytes."); isRunning = false; synchronized (this) { notifyAll(); } } } } /** * Timeout Thread. Kill the main task if necessary. * * @author el * */ public static class TimeOutThread extends Thread { final long timeout; final MainThread controlledObj; TimeOutThread(long timeout, MainThread controlledObj) { setDaemon(true); this.timeout = timeout; this.controlledObj = controlledObj; } boolean isRunning = true; /** * If we done need the {@link TimeOutThread} thread, we may kill it. */ public void kill() { isRunning = false; synchronized (this) { notify(); } } /** * */ @Override public void run() { long deltaT = 0l; try { long start = System.currentTimeMillis(); while (isRunning && deltaT &lt; timeout) { synchronized (this) { wait(Math.max(100, timeout - deltaT)); } deltaT = System.currentTimeMillis() - start; } } catch (InterruptedException e) { // If the thread is interrupted, // you may not want to kill the main thread, // but probably yes. } finally { isRunning = false; } controlledObj.kill(); } } /** * Start the main task and wait for the end. * * @param args * @throws FileNotFoundException */ public static void main(String[] args) throws FileNotFoundException { long start = System.currentTimeMillis(); MainThread main = new MainThread(new File(args[0])); main.start(); try { while (main.isRunning) { synchronized (main) { main.wait(1000); } } long stop = System.currentTimeMillis(); if (main.everythingDone) System.out.println("all done in " + (stop - start) + " ms."); else { System.out.println("could not do everything in " + (stop - start) + " ms."); if (main.endedWithException != null) main.endedWithException.printStackTrace(); } } catch (InterruptedException e) { System.out.println("You've killed me!"); } } } </code></pre> <p>Regards</p>
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    1. POHow to timeout a thread
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