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关键字

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  2. public class Demo02 {
  3.     public static void main(String[] args) {
  4.         System.out.println(Season.SPRING);
  5.     }
  6. }
  7. enum Season {
  8.     SPRING("春天"),SUMMER("夏天");
  10.     private String name;
  12.      private Season(String name) {
  13.         this.name = name;
  14.     }
  16.     public String getName() {
  17.         return name;
  18.     }
  20.     @Override
  21.     public String toString() {
  22.         return "Season{" +
  23.                 "name='" + name + '\'' +
  24.                 '}';
  25.     }
  26. }

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  2. import javax.swing.*;
  4. public class Demo02 {
  5.     public static void main(String[] args) {
  6.         System.out.println(Season.SPRING);
  7.         Season [] seasons = Season.values();
  8.         for (Season season  :seasons) {
  9.             System.out.println(season);
  10.         }
  11.         System.out.println(Season.SPRING.name());
  12.         System.out.println(Season.SPRING.ordinal());
  13.         System.out.println(Season.SPRING.compareTo(Season.SUMMER));
  14.     }
  15. }
  16. enum Season {
  17.     SPRING("春天"),SUMMER("夏天");
  19.     private String name;
  21.      private Season(String name) {
  22.         this.name = name;
  23.     }
  25.     public String getName() {
  26.         return name;
  27.     }
  29.     @Override
  30.     public String toString() {
  31.         return "Season{" +
  32.                 "name='" + name + '\'' +
  33.                 '}';
  34.     }

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  2. public class Demo03 {
  3.     public static void main(String[] args) {
  4.         System.out.println("星期信息如下：");
  5.       Week [] weeks = Week.values();
  6.       for (Week week:weeks){
  7.           System.out.println(week);
  8.       }
  9.     }
  10. }
  11. enum Week{
  12.     MONDAY("星期一"),TUESDAY("星期二"),WEDNESDAY("星期三"),
  13.     THURSDAY("星期四"),FRIDAY("星期五"),SATURDAY("星期六"),SUNDAY("星期天");
  14.     private String name;
  16.    private Week(String name) {
  17.         this.name = name;
  18.     }
  20.     public String getName() {
  21.         return name;
  22.     }
  24.     @Override
  25.     public String toString() {
  26.         return name;
  27.     }
  28. }
  • enum 关键字修饰的类 底层是一个final修饰的 继承 enum的类，所以不能再继承其他类，可以实现接口欧