[FIXED] Can I use the eclipse debugger to write a variable to a file

Issue

Is it possible to create some sort of "trace breakpoint" in eclipse whereby Eclipse will log variables that I choose to a file when a "breakpoint" is hit without pausing the application?

Solution

Sure. For this sample method:

public static void logArgs(final String one, final String two) {
    System.out.println(one + two);
}

put your breakpoint in it, right click it and edit Breakpoint properties... as in the example. The important checkboxes are Conditional and Suspend when 'true'. Just return false so that breakpoint does not suspend at all.

java.io.FileWriter w = new java.io.FileWriter("/tmp/file.txt", true);
w.write(String.format("args(%s, %s)%n"), one, two));
w.close();
return false;

Answered By - Michał Grzejszczak
Answer Checked By - Willingham (JavaFixing Volunteer)