Question

Do I always have to return something using Worker Thread in Swing? What if I don’t have any return value? I just want to use the worker thread to run an infinite for loop… so what to return? and even if I write a dummy return statement after the infinite for loop, say for e.g return 0; then also it will probably say “code not reachable”.

Answer 1

I suspect you haven’t tried it. The code you’ve suggested in the comment should work fine:

public Object construct() {
  for (;;) {
    Node.execution();
    Clock.incrementTimeTick();
    System.out.println(Clock.getTimeInTick());
    repaint();
  }
  // End of loop is unreachable, so no need for a return statement.
}

A tight loop like this seems like a bad idea to me, and the repaint() code will need to be made appropriately thread-safe, but it should compile…

Personally I prefer to use while (true) for “forever” loops, but for (;;) should work too.