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[linbo75]

Hi,
Could anybody tell me how to terminate the current thread?

thanks

linbo

[shmoove]

The moment the run() method of the Thread is finished the thread will be terminated.

shmoove

[linbo75]

Hi,
thank for your reply.
What I want is to terminate the thread if I press a cancel button
because this thread might take very long time ( used for searching something)

thanks again

linbo

[shmoove]

The only thing you can do is set a variable when you want to cancel, and test this variables in several places in the run() method:

boolean cancel;
// ....
public void run() {
  cancel = false;
  doSomething();
  if (cancel) return;
  while (somethingOrOther) {
    doSomethingElse();
    if (cancel) return;
  }
  for (int i = somenumber; i >= 0; i--) {
    doSomethingAgain();
    if (cancel) return;
  }
  doAnotherThing();
  if (cancel) return;
  doOneMoreThing();
  return;
}
// ....
public void commandAction(Command c, Displayable d) {
  if (c == cancelCommand) {
    cancel = true;
  }
}

If you want to cancel in the middle of one of the doSomething() methods then you'll have to check for cancel in them too. If it's a system method (part of the MIDP API), then you're screwed.

shmoove

[linbo75]

Hi shmoove,

Thank you very much

linbo

[niekvs]

Don't forget to declare the cancel boolean as 'volatile', or synchronize all access to it. Otherwise, setting it to true might not be visible to the Thread you want to cancel, depending on the JVM used.

-- Niek