broker.java

java与模式 一书的源码

package com.javapatterns.command.stocktrader;
 
// Invoker. Invoker.java 
public class Broker
{
    /**
     * @link aggregation 
     */
	private Command buyCommand, sellCommand; 
	
	public Broker( Command buy, Command sell)
    {
		buyCommand = buy;
		sellCommand = sell;
	} 
	void buy()
    {
		buyCommand.execute() ;
	} 
	void sell()
    {
		sellCommand.execute(); 
	} 
}