Java中枚举的使用方法详解

package com.zhangch.enum_;
public class Enumeration02 {
    public static void main(String[] args) {
        Season spring = Season.SPRING;
        System.out.println(spring);
    }
}
class Season{
    private String name;
    private String desc;
    // 3、通过static final 方法，对外暴露对象
    public static final Season SPRING = new Season("春", "阳光明媚");
    public static final Season SUMMER = new Season("夏", "炎热");
    // 1、构造器私有化
    private Season(String name, String desc) {
        this.name = name;
        this.desc = desc;
    }
    // 2、取消set方法，防止对属性进行修改
    public String getDesc() {
        return desc;
    }
    public String getName() {
        return name;
    }
    @Override
    public String toString() {
        return "Season{" +
                "name='" + name + '\'' +
                ", desc='" + desc + '\'' +
                '}';
    }
}

package com.zhangch.enum_;
/**
 * @author zhangch
 * @version 1.0
 */
public class Enumeration01 {
    public static void main(String[] args) {
        System.out.println(Season.SPRING);
    }
}
// 演示自定义枚举
enum Season{
    // 1、使用enum关键字替换class
    // 2、声明枚举常量对象的方式： SPRING("夏天", "炎热") -->  常量名(参数列表)
    // 3、如果有多个常量(对象)，使用逗号隔开
    // 4、如果使用enum实现枚举，要求将定义的常量对象，写在对象前面。
    SPRING("春天", "温暖"), SUMMER("夏天", "炎热");
    private String name;
    private String desc;
    private Season(String name, String desc) {
        this.name = name;
        this.desc = desc;
    }
    public String getName() {
        return name;
    }
    public String getDesc() {
        return desc;
    }
    @Override
    public String toString() {
        return "Season{" +
                "name='" + name + '\'' +
                ", desc='" + desc + '\'' +
                '}';
    }
}

Season value = Season.valueOf("SPRING");System.out.println(value);