package SingleInstanceModel;

/**
 * Created by JYM on 2019/1/8
 * 单例模式：枚举方式
 * 下面的代码程序是对枚举方式的单例模式进行改进，增加懒加载的特性，类似于Holder的方式。
 * */

public class Singleton_5_improve
{
    //实例变量
    private byte[] data = new byte[1024];

    private Singleton_5_improve()
    {}

    //使用枚举充当Holder
    private enum EnumHolder
    {
        INSTANCE;
        private Singleton_5_improve instance;

        EnumHolder()
        {
            this.instance = new Singleton_5_improve();
        }

        private Singleton_5_improve getSingleton()
        {
            return instance;
        }
    }

    public static Singleton_5_improve getInstance()
    {
        return EnumHolder.INSTANCE.getSingleton();
    }
}