Java面试题：请问一下代码输出是什么？

class Value

{

public int i = 15;

}

public class Test

{

public static void main(String argv[])

{

Test t = new Test();

t.first();

}

public void first()

{

int i = 5;

Value v = new Value();

v.i = 25;

second(v, i);

System.out.println(v.i);

}

public void second(Value v, int i)

{

i = 0;

v.i = 20;

Value val = new Value();

v =  val;

System.out.println(v.i + ” ” + i);

}

}

答案：

15 0
20