final修饰变量问题

Question

public class Main {
public static void main(String[] args) {
String a = "xiaomeng2";
final String b = "xiaomeng";
String d = "xiaomeng";
String c = b + 2;
String e = d + 2;
System.out.println((a == c));
System.out.println((a == e));
}
}

答案是:true ，false

哪位大佬jiang jiang

 

Answer 1

因为b是字符串常量，比较字符串的值；d是变量比较的地址，地址不相同所以返回假。