一、在jvm1.5之前创建枚举类的方法五步走
/*
1. 创建枚举类的属性(成员遍历),必须是作为私有常量出现
2. 必须将构造方法私有化,这是为了保证类的对象是有限个的目的
3. 提供公共的静态的final方法给外界获取枚举类中多个对象
4. 提供公共的获取属性的方法
5. 重写toString()方法
*/
class Season{
//1. 创建枚举类的属性(成员遍历),必须是作为私有常量出现
private String name;
private String info;
//2. 必须将构造方法私有化,这是为了保证类的对象是有限个的目的
private Season(String name, String info){
this.name = name;
this.info = info;
}
//3. 提供公共的静态的final方法给外界获取枚举类中多个对象
public static final Season SPRING = new Season("春天","春暖花开");
public static final Season SUMMER = new Season("夏天","烈日炎炎");
public static final Season AUTUMN = new Season("秋天","秋高气爽");
public static final Season WINTER = new Season("冬天","白雪皑皑");
//4. 提供公共的获取属性的方法
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getInfo() {
return info;
}
public void setInfo(String info) {
this.info = info;
}
@Override
public String toString() {
return "Season{" +
"name='" + name + '\'' +
", info='" + info + '\'' +
'}';
}
}
public class SeasonDemo1 {
public static void main(String[] args) {
Season spring = Season.SPRING;
Season summer = Season.SUMMER;
}
}
二、在jvm1.5之后枚举类的写法
/*
jdk1.5之后 java提供了一个关键字用于创建枚举类 enum
*/
enum Season2{
//jdk1.5之后必须将有限个对象放在enum枚举类第一个开头位置,多个对象之间使用逗号隔开
SPRING("春天","春暖花开"),
SUMMER("夏天","烈日炎炎"),
AUTUMN("秋天","秋高气爽"),
WINTER("冬天","白雪皑皑");
//1. 创建枚举类的属性(成员遍历),必须是作为私有常量出现
private String name;
private String info;
//2. 必须将构造方法私有化,这是为了保证类的对象是有限个的目的
private Season2(String name, String info){
this.name = name;
this.info = info;
}
//4. 提供公共的获取属性的方法
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getInfo() {
return info;
}
public void setInfo(String info) {
this.info = info;
}
@Override
public String toString() {
return "Season{" +
"name='" + name + '\'' +
", info='" + info + '\'' +
'}';
}
}
public class SeasonDemo2 {
public static void main(String[] args) {
Season2 spring = Season2.SPRING;
System.out.println(spring.getName());
System.out.println(spring.getInfo());
}
}
标签:info,name,Season,枚举,类型,public,String
From: https://www.cnblogs.com/ndmtzwdx/p/18475098