season.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
 */
public class Season
{
	//把Season类定义成不可变的，将其属性也定义成final
	private final String name;
	private final String desc;
	public static final Season SPRING = new Season("春天" , "趁春踏青");
	public static final Season SUMMER = new Season("夏天" , "夏日炎炎");
	public static final Season FALL = new Season("秋天" , "秋高气爽");
	public static final Season WINTER = new Season("冬天" , "围炉赏雪");

	public static Season getSeaon(int seasonNum)
	{
		switch(seasonNum)
		{
			case 1 :
				return SPRING;
			case 2 :
				return SUMMER;
			case 3 :
				return FALL;
			case 4 :
				return WINTER;
			default :
				return null;
		}
	}

	//将构造器定义成private访问权限
	private Season(String name , String desc)
	{
		this.name = name;
		this.desc = desc;
	}
	//只为name和desc属性提供getter方法
	public String getName()
	{
		 return this.name;
	}
	public String getDesc()
	{
		 return this.desc;
	}
}