public class Test_String {public static void main(String[] args) {String a = new String("aa");String b = new String("aa");System.out.PRintln(a == new String("aa")); //false == 判斷 指向的是不是同一個(gè)對(duì)象 new 時(shí)會(huì)創(chuàng)建對(duì)象System.out.println("a == b " + (a == b)); //falseSystem.out.println("a.equals(b) " + (a.equals(b))); //true a.equals(b)判斷兩個(gè)對(duì)象的內(nèi)容是否相等 System.out.println(a.equals(new String("aa"))); //true}

}