String字符串相加常见面试题

String name1="jack";

String name2="jack";

System.out.println(name1==name2); // true

System.out.println(name1.equals(name2)); //true

String name3="jack";

String name4=new String("jack");

System.out.println(name3==name4); //false 因为2值指向地址不一样

System.out.println(name3.equals(name4)); //true

String name5="jack";

String name6="j"+"a"+"c"+"k";

System.out.println(name5==name6); //true

System.out.println(name5.equals(name6)); //true

String s="helloword";

String s1="hello"+"word";

System.out.println(s==s1); //true

System.out.println(s==s1); //true

String name7="jack";

String name8="ja";

System.out.println(name7==name8+"ck"); //false

System.out.println(name1==name2); //true

String字符串相加常见面试题

原文：https://www.cnblogs.com/binghuaZhang/p/10780296.html