挺有意思的一道Java题

输出答案： 15  0
		  20
package LianXi;

	class Value {
	 int i = 15;
	}
		
	public class Test {
	
	 public static void main(String argv[]) {
	  Test t = new Test();
	  t.firstMethod();
	 }
	  
	 public void firstMethod() {
	  int i = 5;
	  Value v = new Value();
	  v.i = 25;
	  secondMethod(v, i);//15  0
	  System.out.println(v.i);//20
	 }
	 
	 public void secondMethod(Value v, int i) {
	  i = 0;
	  v.i = 20;//20
	  Value val = new Value();
	  v = val;
	  System.out.println(v.i + " " + i);
	  }
	  
}