I write a java program that works in NT, Linux but not MPE/IX HP 3000. Any ideal? The message 'do something' don't turn up. import java.io.*; public class test implements Runnable { private test aClient; private boolean bContinue = true; private long sleepTime= 5000; private Thread myThread, tKeyboard; private class Keyboard implements Runnable { private boolean readCharacter = true; private void usage() { System.out.println ("*************************************************"); System.out.println ("'s' to stop 'r' to show status 'd' to wake up"); System.out.println (""); } public void run () { byte[] readBuffer = new byte[2048]; while (readCharacter && bContinue) { try { System.in.read(readBuffer); switch (readBuffer[0]) { case 's': case 'S': readCharacter = false; stop (); break; case 'd': case 'D': wakeUp (); break; case 'r': case 'R': showStatus(); break; default: usage(); break; } } catch (IOException io) {} } } } public static void main (String[] args) { try { test a = new test (); Thread aThread = new Thread (a); a.setThread(aThread); aThread.start (); } catch (Exception e) { System.out.println (e); } } public test () throws Exception { tKeyboard = new Thread (new Keyboard()); tKeyboard.start(); } public void setThread (Thread myThread) { this.myThread = myThread; } private void wakeUp () { myThread.interrupt (); } private void stop () { System.out.println ("Please wait ...."); bContinue = false; } private void showStatus () { System.out.println ("Show status..."); } public void run () { while (bContinue) { System.out.println (" do something...."); if (bContinue) { try { Thread.sleep (sleepTime); } catch (Exception e) {System.out.println ("Wake up");} } } } }