Debugging Programs in Eclipse

1. Write a Java Program
• Factorial Number

• /** Compute the Factorial of n, where n=20.
    *    n! = 1*2*3*...*n
    */
  public class Factorial {
     public static void main(String[] args) {
        int n = 20;          // To compute factorial of n
        int factorial = 1;   // Init the product to 1
   
        int i = 1;
        while (i <= n) {
           factorial = factorial * i;
           i++;
        }
        System.out.println("The Factorial of " + n + " is " + factorial);
     }
  }

2. Set an Initial Breakpoint
   
3. Start Debugger
• Right click anywhere on the source code (or from the "Run" menu) ⇒ "Debug As" ⇒ "Java Application" ⇒ choose "Yes" to switch into "Debug" perspective (A perspective is a particular arrangement of panels to suits a certain development task such as editing or debugging).
• 
4. Step-Over and Watch the Variables and Outputs & Breakpoint, Run-To-Line, Resume and Terminate