package com.zj.tool;public enum WeekDay {Mon("Monday",1),Tue("Tuesday",2),Wed("Wednesday",3),Thu("Thursday",4),Fri("Friday",5),Sat("Saturday",6),Sun("Sunday",7);/**定義枚舉類型自己的屬性**/private final String day;private final int dayNum;private WeekDay(String day,int dayNum) {this.day = day;this.dayNum = dayNum;}public int getDayNum(){return dayNum;}/**定義枚舉類型自己的方法**/public static void printDay(int i){switch(i){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("wrong number!");}}public String getDay() {return day;}public static void main(String args[]) {for (WeekDay day : WeekDay.values()) {System.out.println(day + "====>" + day.getDay()+ "====>" + day.getDayNum());}WeekDay.printDay(5);} }

一個很實際的問題,數據庫里面存的是數字但是頁面要顯示字符串,此時就i顯示出enum的好處了

轉載于:https://www.cnblogs.com/rocky-AGE-24/p/5500106.html

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