package com.aff.equals; public class TestString {
public static void main(String[] args) {
String str1 = "AA";
String str2 = "AA";
String str3 = new String("AA");
System.out.println(str1 == str2);// true
System.out.println(str1.equals(str2));// true
System.out.println(str1 == str3);// false
System.out.println(str1.equals(str3));// true;
}
} 输出结果:
true
true
false
true