java传递给方法的对象传递的是引用

2.java传递给方法的对象传递的是引用

public class Demo2 {
    String s;
}

public class Demo1 {
    public void B(Demo2 demo2){
        demo2.s = "change";
    }

    public static void main(String[] args) {
        Demo1 demo1 = new Demo1();
        Demo2 demo2 = new Demo2();
        demo2.s = "no change";
        System.out.println(demo2.s);
        demo1.B(demo2);
        System.out.println(demo2.s);
    }
}

打印结果

no change
change

Process finished with exit code 0