tv.java

来自「《Java与模式》一书的源代码」· Java 代码 · 共 24 行

package com.javapatterns.command.television;

public class Tv
{
    public void turnOn()
    {
        System.out.println("The televisino is on.");
    }

    public void turnOff()
    {
        System.out.println("The television is off.");
    }

    public void changeChannel(int channel)
    {
        currentChannel = channel;
        System.out.println("Now TV channel is " + channel);
    }

    private int currentChannel = 0;
}