设计模式-<单例模式>
package 单例模式;
public class SingletonPattern {
private volatile static SingletonPattern singletonPattern=null;
private SingletonPattern(){
}
public static SingletonPattern getSingletonPattern() {
/**
* <1> In Thread synchronized
*/
if(singletonPattern==null){
synchronized (SingletonPattern.class) {
if(singletonPattern==null){
singletonPattern=new SingletonPattern();
}
}
}
/**
* <2>
*/
singletonPattern=SingletonPatternInstance.instance;
return singletonPattern;
}
private static class SingletonPatternInstance{
private static SingletonPattern instance=new SingletonPattern();
}
public void say()
{
System.out.println("hello world");
}
/**
* @param
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
SingletonPattern.getSingletonPattern().say();
}
}
本文出自 “飞沙” 博客
补充：软件开发 , Java ,
