#22 Infinite Loop Halting

[Anonymous]

Is there a way to stop execution in the case of an
infinite loop or just something that runs too long?

I'm using WinXP and right now I'm using task manager
and killing Dr.Java, and then killing the javaw.exe
process when this happens.

[Eric E. Allen]

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user_id=429660

You can stop execution during an infinite loop by resetting interactions, via the "reset" button or menu command.

-- Eric

[Robert Cartwright]

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The interactions pane runs in a separate JVM. As Eric stated,
executing the "reset" command breaks infinite loops in the
interactions JVM. It accomplishes this task by killing the
interactions JVM and starting a new interactions JVM.

-- Corky

[dying3000]

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user_id=1344656

How to reset a program like following??? We cannot press the
"reset" button while the programming is waiting for input.

import java.util.*;

public class test {
public static void main(String[] args) {
int count = 0;
Scanner in = new Scanner(System.in);
while (true) {
System.err.println(count++);
in.nextLine();
}
}
}

[Robert Cartwright]

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user_id=430590

This is a new bug (introduced when we refactored DrJava to
support highlighting in the interactions pane) which we hope
to fix soon. We were not aware of this bug until recently
because we never use console input in our courses.
Resetting the interactions pane will break non-terminating
computations but the console I/O sets a lock which prevents
resetting from working.