java之枚举和注解

package anno;

public class Test {
    public static void main(String[] args) {
        //这里获取一个Season对象
        Season spring = Season.SPRING;
        spring.showInfo();
        Season summer = Season.SUMMER;
        summer.showInfo();
        Season autumn = Season.AUTUMN;
        autumn.showInfo();
        Season winter = Season.WINTER;
        winter.showInfo();
        
        spring.test();
        
        //每次执行Season.SPRING获得的都是一个相同的对象，是一种单例模式
        Season spring1 = Season.SPRING;
        System.out.println(spring==spring1);
    }
}
enum Season implements Tmp{
    //这里相当于调用有参的私有构造方法
    SPRING("春天","春暖花开"),
    SUMMER("夏天","炎炎夏日"),
    AUTUMN("秋天","秋高气爽"),
    WINTER("冬天","寒风凌冽");
    private final String NAME;
    private final String DESC;
    private Season(String NAME, String DESC) {
        this.NAME = NAME;
        this.DESC = DESC;
    }
    public void showInfo() {
        System.out.println(this.NAME+":"+this.DESC);
    }
    @Override
    public void test() {
        // TODO Auto-generated method stub
        System.out.println("这是实现Tmp的方法");
    }
}
interface Tmp{
    void test();
}