列舉類jdk5.0之後：用enum關鍵字定義列舉類

package com.hzunheg;

public class SeasonTest {
    public static void main(String[] args) {

    }
}
     enum  Season{      //宣告物件season屬性
     spring("春天","剛好"),
     summer("夏天","熱"),
     autumn("秋天","爽"),
     winter("冬天","冷");

    private final String seasonName;     //
 
兩個屬性
    private final String seasonDesc;
    private Season(String seasonName,String seasonDesc){  //1.私有化構造器
        this.seasonDesc=seasonDesc;
        this.seasonName=seasonName;
    }
    public String getSeasonName(){  //構造器
        return seasonName;
    }
    public String getSeasonDesc(){
        
 
return seasonDesc;
    }
    public String toString() {       //toString方法
        return "Season{" + "seasonDesc=" + seasonDesc + ", seasonName='" + seasonName + '\'' + '}';
    }
}

常用的enum方法：

 System.out.println(autumn.toString());//toString:返回當前列舉類物件常量的名稱
        Season[] values = Season.values();  //
 
使用value方法，可以遍歷所有物件
        for (int i = 0; i <values.length ; i++) {
            System.out.println(values[i]);
        }
        Season winter=Season.valueOf("winter"); //valueOf；返回列舉類中物件名是objName的物件；
        System.out.println("winter");