Java-使用哈希码比较对象的值

 1 package com.tj;
 2 
 3 import java.io.File;
 4 
 5 public class MyHash {
 6     public static void main(String[] args) {
 7         File f1 = new File("a");
 8         File f2 = new File("b");
 9         File f3 = new File("c");
10 
11         // 获取Hash码
12         int hc1 = f1.hashCode();
13         int hc2 = f2.hashCode();
14         int hc3 = f3.hashCode();
15 
16         System.out.println(hc1 + "===" + hc2 + "===" + hc3);
17 
18         // 检查两个对象值是否相同
19         if (hc1 == hc2 && f1.equals(f2)) {
20             System.out.println(true);
21         } else {
22             System.out.println(false);
23         }
24 
25         // 获取标识哈希吗
26         int ihc1 = System.identityHashCode(f1);
27         int ihc2 = System.identityHashCode(f2);
28         int ihc3 = System.identityHashCode(f3);
29 
30         System.out.println(ihc1 + "===" + ihc2 + "===" + ihc3);
31 
32     }
33 }