java - How to set breakpoints at specific spots in Intellij?

Question

I have a program that modifies images. When I try to compare the results of my program to the expected values the result is pretty much unreadable.

This continues for very very long, so how can I make it so that I only see the difference between the expected and actual values, and where these differences are?

And when using the inbuild debugger, for example if I have a loop

 for (int i = 0; i < 100; i++) {
  for (int j = 0; j < 100; j++) {
    do stuff
  }
}

How can I set up a breakpoint so the debugger can tell me the values of things I need to know to find out what the error is:

1. When i = 99
2. Right before a discrepancy between the expected and actual value occurs
3. Right before the program exits to an error such as out of bounds.

Because currently, all I can do set a breakpoint on a specific line, but inside a loop I have to click step over repeatedly rather than skip to where I need in the loop.

question from:https://stackoverflow.com/questions/65851817/how-to-set-breakpoints-at-specific-spots-in-intellij

Answer 1

TLDR; right click on a breakpoint and add code that returns a boolean to make it a conditional breakpoint

I think this post useful for your question.

conditional breakpoint in IntelliJ