xiaozhengyu#StudyNotes#字符串 & 堆 & 方法区1

# 字符串 & 堆 & 方法区 ## 1. 问题引入 ```java package com.learn.java; /** * @author xzy * @date 2020-09-17 22:33 * 说明：字符串 & 堆 & 方法区 */ public class Main { public static String s = "HELLO WORLD!"; public static void main(String[] args) { String s1 = "HELLO WORLD!"; String s2 = "HELLO WORLD!"; String s3 = new String("HELLO WORLD!"); System.out.println(s1 == s); // true System.out.println(s2 == s); // true System.out.println(s1 == s2);// true System.out.println(s3 == s); // false System.out.println(s3 == s1);// false System.out.println(s3 == s2);// false } } ``` ## 2.问题分析 !