기본형 매개변수와 참조형 매개변수

public class ParameterEx1 {

	public static void main(String[] args) {
		Value v = new Value();
		v.val = 100;
		change1(v.val);
		System.out.println("2. change1()이후 : " + v.val);
		change2(v);
		System.out.println("4. change2()이후 : " + v.val);
	}

	static void change1(int val) {
		val += 100;
		System.out.println("1. change1() : " + val);
	}

	static void change2(Value v) {
		v.val += 100;
		System.out.println("3. change2() : " + v.val);
	}

}

class Value {
	int val;
}

>
1. change1() : 200
2. change1()이후 : 100
3. change2() : 200
4. change2()이후 : 200