1 package com.bytezreo.singleton;
 2 
 3 /**
 4  * 
 5  * @Description   单例设计模式 例子-----饿汉式
 6  * @author Bytezero·zhenglei!        Email:420498246@qq.com
 7  * @version
 8  * @date 上午9:01:05  
 9  * @
10  *
11  */
12 public class SingletonTest 
13 {
14     public static void main(String[] args) {
15         
16         //Bank bank = new Bank();
17         
18         Bank bank1 = Bank.getInstance();
19         
20         Bank bank2 = Bank.getInstance();
21         
22         System.out.println(bank1 == bank2);   //true
23         
24     }
25 }
26 
27 
28 //饿汉式
29 class Bank
30 {
31     
32     //1.私有类的构造器
33     private Bank()
34     {
35         
36     }
37     
38     //2.内部创建类的对象
39     //4.要求此对象也必须声明为静态的
40     private static Bank instance = new Bank();
41     
42     
43     
44     //3.提供公共静态的方法，返回类的对象
45     public static Bank getInstance()
46     {
47         return instance;
48     }
49 }