java枚举类型enum用法有哪些

Java中枚举类型（enum）的用法有以下几种：

定义枚举类型：使用关键字"enum"定义枚举类型，并在{}内列出枚举常量。

enum Season {SPRING, SUMMER, AUTUMN, WINTER}

枚举常量：枚举类型中的每个常量都是枚举类型的一个实例对象，可以通过常量名来访问。

Season spring = Season.SPRING;

枚举方法：枚举类型可以定义自己的方法。

enum Season {SPRING, SUMMER, AUTUMN, WINTER;public void printSeason() {System.out.println("This is " + this.name());}}

枚举构造函数：枚举类型可以有构造函数，并且只能在枚举常量中调用。

enum Season {SPRING("March to May"), SUMMER("June to August"), AUTUMN("September to November"), WINTER("December to February");private String description;Season(String description) {this.description = description;}public String getDescription() {return description;}}

自定义属性和方法：枚举类型可以有自定义的属性和方法。

enum Season {SPRING("March to May"), SUMMER("June to August"), AUTUMN("September to November"), WINTER("December to February");private String description;Season(String description) {this.description = description;}public String getDescription() {return description;}public static void printAllSeasons() {for (Season season : Season.values()) {System.out.println(season.getDescription());}}}

使用switch语句：可以使用switch语句对枚举类型进行匹配。

Season season = Season.SPRING;switch (season) {case SPRING:System.out.println("It's spring");break;case SUMMER:System.out.println("It's summer");break;case AUTUMN:System.out.println("It's autumn");break;case WINTER:System.out.println("It's winter");break;}