java中枚举的使用

package com.skiff.www.base.grammar.enums;

import java.util.EnumMap;
import java.util.Map;

/**
 * @Auther: 一叶扁舟
 * @Date: 2018/12/22 15:17
 * @Description:EnumMap的使用和枚举的使用
 */
public class EnumMapTest {
    public static void main(String[] args) {
        Map<Action,String> map = new EnumMap<Action, String>(Action.class);
        map.put(Action.TURN_LEFT,"向左转");
        map.put(Action.TURN_RIGHT,"向右转");
        map.put(Action.RUN,"跑步");

        for (Action action: Action.values()) {
            System.out.println(action);
            System.out.println(map.get(action));
        }

        System.out.println("===========================");
        for (Status status: Status.values()){
            System.out.println(status);
        }
        //valueOf是将一个字符串转换成一个枚举类型
        System.out.println("BALANCE:"+Status.valueOf("BALANCE"));
        System.out.println(Status.getIndex(1));
        System.out.println(Status.getIndex(2));
        System.out.println("================");
        System.out.println(Status.getNameCn("alipay"));
    }
}

enum Action{
    TURN_LEFT,TURN_RIGHT, RUN;
}

enum Status{
    WECHAT(1,"wechat","微信支付"),
    ALIPAY(2,"alipay","支付宝支付"),
    BALANCE(3,"balance","余额支付");
    private int index;
    private String nameEn;
    private String nameCn;

    Status(int index, String nameEn, String nameCn) {
        this.index = index;
        this.nameEn = nameEn;
        this.nameCn = nameCn;
    }

    public static String getIndex(int index){
        for (Status status : Status.values()) {
            if (status.getIndex() == index) {
                return status.getNameEn();
            }
        }
        return null;
    }

    public static String getNameCn(String nameEn){
        for (Status status: Status.values()){
            if(status.getNameEn().equals(nameEn)){
                return status.getNameCn();
            }
        }
        return null;
    }

    public int getIndex() {
        return index;
    }

    public String getNameEn() {
        return nameEn;
    }

    public String getNameCn() {
        return nameCn;
    }
}

 

 

package com.skiff.www.base.grammar.enums;

/**
 * @Auther: 一叶扁舟
 * @Date: 2018/12/22 15:47
 * @Description:使用枚举进行权限控制
 */
public class AccessControl {

    public static boolean checkRight(Access access){
        if(Access.MANAGER == access){
            return true;
        }else if(Access.DEPARTMENT == access){
            return false;
        }
        return false;
    }

    public static void main(String[] args) {
        Access manager = Access.valueOf("MANAGER");
        System.out.println(manager);
        System.out.println(checkRight(manager));
    }
}

enum Access{
    MANAGER(1,"manager"),
    DEPARTMENT(2,"department"),
    EMPLOYEE(3,"employee");
    private int index;
    private String name;

    Access(int index, String name) {
        this.index = index;
        this.name = name;
    }
}