Java switch 使用枚举类_java switch case不能用枚举类

开发过程中为了代码的可阅读性和可维护性，很多类型字段往往会习惯使用枚举去定义，可是在一些判断里面想用switch去代替if else 就会出现以下问题

public enum SexType {
    MAN(1, "男"),
    GIRL(2, "女"),
    ;
    private int type;
    private String work;
 
    SexType(int type, String work) {
        this.type = type;
        this.work = work;
    }
 
    public int getType() {
        return type;
    }
 
    public void setType(int type) {
        this.type = type;
    }
 
    public String getWork() {
        return work;
    }
 
    public void setWork(String work) {
        this.work = work;
    }
}

如果直接使用会因为case后跟的是常量表达式而导致报错

解决办法：知道枚举的值，可先获取枚举值对应的枚举，再使用switch

1、修改枚举类，新增一个静态方法，getByType()

package com.jaryn.emun;
 
public enum SexType {
    MAN(1, "男"),
    GIRL(2, "女"),
    OTHER(0, "未知"),
    ;
    private int type;
    private String work;
 
    SexType(int type, String work) {
        this.type = type;
        this.work = work;
    }
 
    public int getType() {
        return type;
    }
 
    public void setType(int type) {
        this.type = type;
    }
 
    public String getWork() {
        return work;
    }
 
    public void setWork(String work) {
        this.work = work;
    }
 
    public static SexType getByType(int type){
        for (SexType constants : values()) {
            if (constants.getType() == type) {
                return constants;
            }
        }
        return OTHER;
    }
}

2、修改方法逻辑