Java String字符串常量池问题

Question

第一个是false而第二个是true，不太理解

        String s1 = new String("hello");
        String intern1 = s1.intern();
        String s2 = "hello";
        System.out.println(s1 == s2);
        String s3 = new String("hello") + new String("hello");
        String intern3 = s3.intern();
        String s4 = "hellohello";
        System.out.println(s3 == s4);

Answer 1

http://www.cnblogs.com/justcooooode/p/7603381.html 参考这个，你的问题上面有