单例模式

package test3;public class SingleExample {private SingleExample(){} static SingleExample singleExample;private static class GetExample{   private final static SingleExample singleExample=new SingleExample();}public static SingleExample getInstance(){return GetExample.singleExample;}public static void main(String[] args) {SingleExample singleExample1,singleExample2;singleExample1=SingleExample.getInstance();singleExample2=SingleExample.getInstance();System.out.println(singleExample1==singleExample2);}}