关于java中变量的相关问题

Question

为什么情况1的输出是5，而情况2的输出是1呢？
情况1：

public class Draft {
    public static void main(String[] args){
        Draft1 draft1 = new Draft1 ();
        draft1.i = 1;
        test (draft1);
        System.out.println (draft1.i );
    }

    public static void test(Draft1 draft1){
        draft1.i = 5;
    }
}
class Draft1{
    int i;
}

情况2：

public class Draft {
    public static void main(String[] args){
        Draft1 draft1 = new Draft1 ();
        draft1.i = 1;
        test (draft1);
        System.out.println (draft1.i );
    }

    public static void test(Draft1 draft1){
        draft1 = new Draft1 ();
        draft1.i = 5;
    }
}
class Draft1{
    int i;
}

Answer 1

红色线为test方法做的操作