java 枚举2

 package com.wsy.test;

 public enum Color {
     RED("红色",1),GREEN("绿色",2),BLUE("蓝色",3);
     private String name;
     private int index;
     private Color(String name , int index) {
         this.name = name;
         this.index = index;
     }
     @Override
     public String toString()
     {
         return "颜色为:"+this.name+"    序号为:"+this.index;
     }
 }

 package com.wsy.test;

 public enum SexEnum {
     MALE,FAMALE;

 }

 package com.wsy.test;

 public class Test {

     public static void main(String[] args) {
         Color c1 = Color.RED;
         switch(c1)
         {
             case RED:
                 c1 = Color.BLUE;
                 break;
             case BLUE:
                 c1 = Color.GREEN;
                 break;
             case GREEN:
                 c1 = Color.RED;
                 break;
             default:
                 c1 = null;
                 break;
         }
         System.out.println(c1);
     }

 }

 package com.wsy.test;

 public class Test2 {

     public static void main(String[] args) {
 //        for(int i =0; i<Color.values().length; i++)
 //        {
 //            System.out.println(Color.values()[i]);
 //        }
         for(Color c:Color.values())
         {
             System.out.println(c);
         }

     }

 }

 package com.wsy.test;

 public class Test3 {

     public static void main(String[] args) {
         Color c1 = Color.BLUE;
         for(int i =0; i<Color.values().length; i++)
         {
             System.out.println(c1+"与"+Color.values()[i]+"的比较结果是"+c1.compareTo(Color.values()[i]));
         }
         //显示的结果证明如果相等的话返回0 如果想了解更多可以进入源代码查看
         for(int i=0; i<Color.values().length; i++)
         {
             System.out.println("索引:"+Color.values()[i].ordinal()+" 值:"+Color.values()[i]);
         }
         //索引和数组下标一样 从0开始
     }

 }

 package com.wsy.test;

 public class Test4 {
     public static void main(String[] args) {
         for(WeekDay day:WeekDay.values())
         {
             System.out.println(day+"=====>"+day.getDay());
         }
         WeekDay.printDay(1);
     }
 }

 package com.wsy.test;

 public enum WeekDay {
     MON("Monday"),TUE("Tuesday"),WED("Wednesday"),THU("Thursday"),FRI("Friday"),SAT("Saturday"),SUN("Sunday");
     private String day;
     private WeekDay(String day)
     {
         this.day = day;
     }
     public static void printDay(int day)
     {
         switch(day)
         {
             case 1:
                 System.out.println(WeekDay.MON);
                 break;
             case 2:
                 System.out.println(WeekDay.TUE);
                 break;
             case 3:
                 System.out.println(WeekDay.WED);
                 break;
             case 4:
                 System.out.println(WeekDay.THU);
                 break;
             case 5:
                 System.out.println(WeekDay.FRI);
                 break;
             case 6:
                 System.out.println(WeekDay.SAT);
                 break;
             case 7:
                 System.out.println(WeekDay.SUN);
                 break;
             default:
                 System.out.println("error");
                 break;
         }
     }
     public String getDay() {
         return day;
     }

 }