问题遇到的现象和发生背景
问题相关代码,请勿粘贴截图
为什么两套一样的代码,执行结果不一样?
@Test
public void test2(){
String s3 = new String("1") + new String("1");
String s5 = s3.intern();
System.out.println(s5 == s3);//false
String s4 = "11";
System.out.println(s3 == s4);//false
System.out.println(s5 == s4);//true
}
@Test
public void test22(){
String s3 = new String("a") + new String("b");
String s5 = s3.intern();
System.out.println(s5 == s3);//true
String s4 = "ab";
System.out.println(s3 == s4);//true
System.out.println(s5 == s4);//true
}