String引用的值改变了为什么赋值的值没变

Question

代码跟运行结果如下

 public static void main(String[] agrs){
        String s1 = new String("aaa");
        String s2 = s1;

        System.out.println("s1=" + s1);
        System.out.println("s2=" + s2);
        s1 = "bbb";
        System.out.println("s1=" + s1);
        System.out.println("s2=" + s2);

    }

s1=aaa
s2=aaa
s1=bbb
s2=aaa

Answer 1

引用https://www.zhihu.com/question/20618891
string是不可变的引用类型，赋值时等于是将新的字符串值得引用指向到变量名，每写一个新的字符串值就会在内存开辟新的地址存放这个值