六大设计原则，23个设计模式之四

        1.1 饿汉模式：静态的，会提前new

package com.apesource.singlton;


public class Hungre {
    private static Hungre hungre = new Hungre();

    //创建私有构造

    public Hungre() {
    }
    //创建公共方法构造
    public static synchronized Hungre crean(){
        return  hungre;
    }
}

        1.2 懒汉模式：需要的时候在new

package com.apesource.singlton;


public class Lazy {
    private static Lazy lazy = null;

    //创建私有构造

    public Lazy() {
    }
    //创建公共方法构造
    public static synchronized Lazy crean(){
        if(lazy == null){
            lazy = new Lazy();
        }
        return  lazy;
    }
}

package com.apesource.factory;