java enum

java枚举类型

java枚举类型类似java中的普通类，编译后生成.class字节码文件。

参考：http://www.cnblogs.com/frankliiu-java/archive/2010/12/07/1898721.html

http://www.cnblogs.com/happyPawpaw/archive/2013/04/09/3009553.html

直接使用关键字enum enum_type_name就行了

Color.java

 1 package com.gxf.enumTest;
 2 
 3 enum Color {
 4     RED(255, 0, 0),GREEN(0,255,0),BLUE(0,0,255);
 5     private int valueRed;
 6     private int valueGreen;
 7     private int valueBlue;
 8     
 9     Color(int red, int green, int blue){
10         this.valueRed = red;
11         this.valueGreen = green;
12         this.valueBlue = blue;
13     }
14     public String toString(){
15         return "(valueRed = " + this.valueRed + "," + "valueGreen = " + valueGreen + "," 
16                 + "valueBlue = " + valueBlue + ")";
17     }
18 }
19 enum Fruit{
20     APPLE, ORANGE, BANANA;
21 }

test.java

 1 package com.gxf.enumTest;
 2 
 3 public class test {
 4 
 5     public static void main(String[] args) {
 6         Color redColor = Color.RED;
 7         System.out.println(redColor.toString());
 8         
 9         Fruit apple = Fruit.APPLE;
10         System.out.println(apple);
11         System.out.println(apple.ordinal());
12     }
13 
14 }