比较两个对象

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package com.javaio.test;

public class TestString1 {

/**
* @param args
*/
public static void main(String[] args) {
  // TODO Auto-generated method stub
  String a = "dong";
  String b = "dong";

String c = new String("dong");
String d = new String("dong");

  if (a == b) {
   System.out.println("地址对象 " + "true");
  }

  if (a.hashCode() == b.hashCode()) {
   // System.out.println(a.hashCode());
   // System.out.println(b.hashCode());
   System.out.println("hashCode是否相等 " + "true");
  }

  if (a.endsWith(b)) {
   System.out.println("值是否相同 " + "true");
  }
  System.out.println("=======================================");
  if (a == c) {
   System.out.println("地址对象 " + "true");
  }

  if (a.hashCode() == c.hashCode()) {
   // System.out.println(a.hashCode());
   // System.out.println(b.hashCode());
   System.out.println("hashCode是否相等 " + "true");
  }

  if (a.endsWith(c)) {
   System.out.println("值是否相同 " + "true");
  }
  System.out.println("-------------------------------");
  if (d == c) {
   System.out.println("地址对象 " + "true");
  }

  if (d.hashCode() == c.hashCode()) {
   // System.out.println(a.hashCode());
   // System.out.println(b.hashCode());
   System.out.println("hashCode是否相等 " + "true");
  }

  if (d.endsWith(c)) {
   System.out.println("值是否相同 " + "true");
  }
}

}

--------------------------------

地址对象 true
hashCode是否相等 true
值是否相同 true
=======================================
hashCode是否相等 true
值是否相同 true
-------------------------------
hashCode是否相等 true
值是否相同 true