Eclipse - Java - Hotswap without breakpoints

Question

I have a question. Is it possible to use the hotswap without using breakpoints ?

When notch made prelude of chambered (http://www.youtube.com/user/Nizzotch?feature=playlist-comment#p/u) he used the hotswap without having to : - add breakpoints - save - remove breakpoint - resume In this video it's too fast to see that, but i can't find old ones.

Do you have an idea ? eclipse-options, macro, plugins ... ?

Thank you

Answer 1

Depends on your JVM, but hotswap in Eclipse worked for me with no tricks on the Sun's HotSpot JVM back in the times of Java 1.5. Here's a related Sun's bug. Which JVM are you using?

public class Test {
    private static int ctr = 0;
    public static void main(String[] args) {
        while (true) {
            method();
            try {
                Thread.sleep(200);
            } catch (InterruptedException e) {
                System.err.println("Interrupted");
            }
        }
    }

    private static void method() {
        System.out.println(ctr);
    }
}

I changed System.out.println(ctr); to System.out.println(ctr++);, and my output altered to an increasing sequence.