设计模式-----------单例模式

饿汉式

/** * 饿汉式 * @author Administrator * */public class SingleTon {private SingleTon(){}private static SingleTon  singleTon  = new SingleTon();public static SingleTon  getInstance(){return  singleTon  ;}}

                                                     懒汉式

/** * 懒汉式 * @author Administrator * */public class SingleTon2 {private SingleTon2(){}private static SingleTon2  instance ;public static SingleTon2  getInstance(){if(instance==null){instance = new SingleTon2() ;}return instance ;}}