自定义枚举类及使用enum的枚举类

package com.atguigu.java1;

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 AUTUMN = new Season("autumn", "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 + "]";
}
public void show(){
System.out.println("这是一个季节");
}
}

package com.atguigu.java1;
/*
* 一、枚举类
* 1.如何自定义枚举类
* 2.如何使用enum关键字定义枚举类
*     >常用的方法:values() valueOf(String name)
*     >如何让枚举类实现接口:可以让不同的枚举类的对象调用被重写的抽象方法，执行的效果不同。（相当于让每个对象重写抽象方法）
*/
public class TestSeason1 {
public static void main(String[] args) {
Season1 spring = Season1.SPRING;
System.out.println(spring);
spring.show();
System.out.println(spring.getSeasonName());

System.out.println();
//1.values()
Season1[] seasons = Season1.values();
for(int i = 0;i < seasons.length;i++){
System.out.println(seasons[i]);
}
//2.valueOf(String name):要求传入的形参name是枚举类对象的名字。
//否则，报java.lang.IllegalArgumentException异常
String str = "WINTER";
Season1 sea = Season1.valueOf(str);
System.out.println(sea);
System.out.println();

Thread.State[] states = Thread.State.values();  //可自行查看Thread的源码；
for(int i = 0;i < states.length;i++){
System.out.println(states[i]);
}
sea.show();

}
}
interface Info{
void show();
}
//枚举类
enum Season1 implements Info{
SPRING("spring", "春暖花开"){
public void show(){
System.out.println("春天在哪里？");
}
},
SUMMER("summer", "夏日炎炎"){
public void show(){
System.out.println("生如夏花");
}
},
AUTUMN("autumn", "秋高气爽"){
public void show(){
System.out.println("秋天是用来分手的季节");
}
},
WINTER("winter", "白雪皑皑"){
public void show(){
System.out.println("冬天里的一把火");
}
};

private final String seasonName;
private final String seasonDesc;

private Season1(String seasonName,String seasonDesc){
this.seasonName = seasonName;
this.seasonDesc = seasonDesc;
}
public String getSeasonName() {
return seasonName;
}
public String getSeasonDesc() {
return seasonDesc;
}

//	public void show(){
//	 System.out.println("这是一个季节");
//	}
}