Description Benno Baumgartner 2007-05-07 08:34:07 EDT

I20070503-1400

Given:
package test;
public class E1 {
	public void countDown(int i) {
		if (i == 0) {
			System.out.println("bumm!");
			return;
		}
		
		System.out.println(i);
		countDown(--i);
	}
	
	public static void main(String[] args) {
		new E1().countDown(10);
	}
}

1. Select countDown
2. Introduce Parameter Object
3. Accept defaults
Is:
package test;
public class E1 {
	public void countDown(CountDownParameter parameterObject) {
		int i = parameterObject.i;
		if (i == 0) {
			System.out.println("bumm!");
			return;
		}
		
		System.out.println(i);
		countDown(parameterObject);
	}
	
	public static void main(String[] args) {
		new E1().countDown(new CountDownParameter(10));
	}
}
Same problem when writing
i= i - 1;
countDown(i);
Should:
 Not do that;-) I guess create a new parameter object for recursive call would be the easiest thing to do.