线程安全的单例模式

Posted 2021-02-27 yanss

饿汉模式

 1 public class Single  {
 2 
 3     private static Single  instance = new Single();
 4     
 5     private Single(){
 6         System.out.println("Single: " + System.nanoTime());
 7     }
 8     
 9     public static Single getInstance(){
10         return instance;
11     }
12 }