如何自定义枚举类
如何使用enum定义枚举类、枚举类的主要方法
实现接口的枚举类
JDK1.5之前需要自定义枚举类
JDK1.5新增的enum关键字用于定义枚举类
若枚举只有一个成员，则可以作为一种单例模式的实现方式
枚举类对象的属性不应允许被改动，所以应该使用private final修饰。同时枚举类用private final修饰的属性应该在构造器中为其赋值。若枚举类显式的定义了带参数的构造器，则在列出枚举值时也必须对应的传入参数。
package com.atguigu.java1;
/*
* 一、枚举类
* 1.如何自定义枚举类
*/
public class TestSeason {
public static void main(String[] args){
Season spring = Season.SPRING;
System.out.println(spring);
//spring.show();
System.out.println(spring.getSeasonName());
}
}
//枚举类
class Season{
//1.提供类的属性，声明为private final
private final String seasonName;
private final String seasonDesc;
//2.声明为final的属性，在构造器中初始化
private Season(String seasonName, String seasonDesc){
this.seasonName = seasonName;
this.seasonDesc = seasonDesc;
}
//3.通过公共的方法来调用属性
public String getSeasonName() {
return seasonName;
}
public String getSeasonDesc() {
return seasonDesc;
}
//4.创建枚举类的对象:将类的对象声明为public static final
public static final Season SPRING = new Season("spring","春暖花开");
public static final Season SUMMER = new Season("summer","夏日炎炎");
public static final Season AUTOMN = new Season("automn","秋高气爽");
public static final Season WINTER = new Season("winter","白雪皑皑");
@Override
public String toString() {
return "Season [seasonName=" + seasonName + ", seasonDesc="
+ seasonDesc + "]";
}
}
