concretecommand.java

来自「《Java与模式》一书的源代码」· Java 代码 · 共 22 行

package com.javapatterns.command.undoconcept;

public class ConcreteCommand implements Command
{
    private Receiver receiver;

    public ConcreteCommand(Receiver receiver)
    {
        this.receiver = receiver;
    }

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

    public void reexecute() { }

    public void unexecute() { }

}