regsingletonchild.java

来自「《Java与模式》一书的源代码」· Java 代码 · 共 21 行

package com.javapatterns.singleton.demos;


/** This class is a subclass of RegSingleton */

public class RegSingletonChild extends RegSingleton
{
    public RegSingletonChild() { }

    public static RegSingletonChild getInstance()
    {
        return (RegSingletonChild)RegSingleton.getInstance("com.javapatterns.singleton.demos.RegSingletonChild");
    }

    public String about()
    {
        return "Hello, I am RegSingletonChild.";
    }

}