anonymousinner.java

疯狂Java讲义_源码(含Java设计模式CHM

/**
 * Description:
 * <br/>Copyright (C), 2005-2008, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee [e-mail]
 * @version  1.0
 */
abstract class Device
{
	private String name;
	public abstract double getPrice();
	public Device(){}
	public Device(String name)
	{
		this.name = name;
	}
	public void setName(String name)
	{
		this.name = name;
	}
	public String getName()
	{
		 return this.name;
	}
}
public class AnonymousInner
{
	public void test(Device d)
	{
		System.out.println("购买了一个" + d.getName() + "，花掉了" + d.getPrice());
	}
	public static void main(String[] args) 
	{
		AnonymousInner ai = new AnonymousInner();
		//调用有参数的构造器创建Device匿名实现类的对象
		ai.test(new Device("电子示波器")
		{
			public double getPrice()
			{
				return 67.8;
			}
		});
		//调用无参数的构造器创建Device匿名实现类的对象
		Device d = new Device()
		{
			//初始化块
			{
				System.out.println("匿名内部类的初始化块...");
			}
			//实现抽象方法
			public double getPrice()
			{
				return 56.2;
			}
			//重写父类的实例方法
			public String getName()
			{
				return "键盘";
			}
		};
		ai.test(d);
	}
}