command.java

This book code procedure according to the chapter arrangement, the 1st chapter of example under "1"

package com.example.operate;
/**
 * <p>标题: 命令接口</p>
 * <p>描述: 定义了命令类的通用接口。</p>
 * <p>版权: Copyright (c) 2005</p>
 * <p>公司: </p>
 * @作者 杜江
 * @版本 1.0
 */
public interface Command {
  public void execute();
}