基于JAVA的设计模式之命令模式

public interface Kitchener {
    public void cook();
}

public class BeefKitchener implements Kitchener {
    public void cook() {
        System.out.println("做牛肉");
    }
}

public class ChickenKitchener implements Kitchener {
    public void cook() {
        System.out.println("做烤鸡");
    }
}

public interface Command {
    public void execute();
}

public class CookBeefCommand implements Command {
    private Kitchener kitchener;
    public void execute() {
        kitchener=new BeefKitchener();
        kitchener.cook();
    }
}

public class CookChickenCommand implements Command {
    private Kitchener kitchener;
    public void execute() {
        kitchener=new ChickenKitchener();
        kitchener.cook();
    }
}

public class WaiterInvoker {
    private Command command;

    public void setCommand(Command command) {
        this.command = command;
    }

    public void action(){
        command.execute();
    }
}

public class Main {
    public static void main(String[] args) {
        WaiterInvoker waiterInvoker=new WaiterInvoker();
        Command command=new CookBeefCommand();
        waiterInvoker.setCommand(command);
        waiterInvoker.action();
    }
}