命令模式（Command）讲解

文章作者 100test 发表时间 2007:10:15 12:10:59
来源 100Test.Com百考试题网

JAVA的命令模式（Command）相信大家都了解吧，一起来看下面的代码。

public class Invoker
{
private Command command.
public Invoker(Command command)
{
this.command=command.
}
public void action()
{
command.action().
}
}

public class Receiver
{
public Receiver()
{
...
}
public void action()
{
System.out.println("Action has been taken.").
}
}

public interface Command
{
void execute().
}

public class ConcreteCommand implements Command
{
private Receiver receiver.
public ConcreteCommand(Receiver receiver)
{
this.receiver=receiver.
}
public void execute()
{
receiver.action().
}
}

public class Client
{
public static void main(String[] args)
{
Receiver receiver=new Receiver().
Command command=new ConcreteCommand(receiver).
Invoker invoker=new Invoker(command).
invoker.action().
}
}