Java Stack Demo

/**
 * 
 */
package freewill.stackdemo;

import java.util.Scanner;

/**
 * @author freewill
 * @see Core Java page482
 * 
 */
public class StackTraceTest {
	public static int factorial(int n) {
		System.out.println("factorial(" + n + ")");
		Throwable t = new Throwable();
		StackTraceElement[] frames = t.getStackTrace();
		for (StackTraceElement f : frames) {
			System.out.println(f);
		}
		int r;
		if (n <= 1)
			r = 1;
		else
			r = n * factorial(n - 1);
		System.out.println("return " + r);
		return r;
	}

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		System.out.println("Enter n: ");
		int n = in.nextInt();
		factorial(n);
	}
}