/**
* 饿汉式
*/
class SingletonHungery{
private static SingletonHungery s = new SingletonHungery();
private SingletonHungery(){
}
public static SingletonHungery getInstance(){
return s;
}
}
/**
* 懒汉式
*/
class SingletonLazy{
private static SingletonLazy s;
private SingletonLazy(){
}
public static SingletonLazy getInstance(){
if(s == null) {
s = new SingletonLazy();
}
return s;
}
}
public class SingletonDemo {
public static void main(String[] args) {
SingletonHungery s1 = SingletonHungery.getInstance();
SingletonHungery ss1 = SingletonHungery.getInstance();
System.out.println(s1 == ss1);
SingletonLazy s2 = SingletonLazy.getInstance();
SingletonLazy ss2 = SingletonLazy.getInstance();
System.out.println(s2 == ss2);
}
}
