CS 101 Lecture 19 - Debugging, Recursion Practice

Two Debugging Techniques

1. Use the BlueJ debugger.
   • Set breakpoints by clicking in the breakpoint column to the left of your code in the text editor.
   • Single-step through the code using the Step and Step Into buttons.
   • Inspect the values of static, instance and local variables as you step through the code.

2. Use "System.out.println" to display the values of key variables (not too many!) as the program executes.

   Example:
   

       if (DEBUG) {
           System.out.println("Base is " + base + " and n is " + n + ".");
       }
   

   where DEBUG is a constant set to true or false depending on whether you wish to see the debugging output or not.

Class Example:

1. Let's allow damage to the broccoli structure.

   Click on BroccoliDamage to show the example.