Java enum 枚举类型
枚举类型是一个常量集合的数据类型。
因为都是常量，所以一个枚举类型中的字段名都要大写。
在JAVA中，枚举类型的定义是通过“enum“关键字进行的。例如你要定义
一个表示一个星期的每一天的枚举类型：
public enum Day {
SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY,
SATURDAY
}
强烈建议当你需要定义一组常量时，使用枚举类型。
下面我们来看怎样使用上面定义的类型Day：
public class EnumTest {
Day day;
public EnumTest(Day day){
this.day = day;
}
public void tellItLikeItIs(){
switch(day){
case MONDAY: System.out.println("Mondays are bad."); break;
case FRIDAY: System.out.println("Fridays are better"); break;
case SATURDAY:
case SUNDAY: System.out.println("Weekends are best"); break;
default: System.out.println("Midweek days are so-so.")
}
}
public static void main(String[] args){
EnumTest firstDay = new EnumTest(Day.MONDAY);
firstDay.tellItLikeItIs();
EnumTest thirdDay = new EnumTest(Day.WEDNESDAY);
thirdDay.tellItLikeItIs();
EnumTest fifthDay = new EnumTest(Day.FRIDAY);
fifthDay.tellItLikeItIs();
EnumTest sixthDay = new EnumTest(Day.SATURDAY);
sixthDay.tellItLikeItIs();
EnumTest seventhDay = new EnumTest(Day.SUNDAY);
seventhDay.tellItLikeItIs();
}
}
输出：
Mondays are bad.
Midweek days are so-so.
Fridays are better.
Weekends are best.
Weekends are best.
JAVA中�
非常简单,在C#中只需要在类的方法的上方敲三下"/"就自动帮你添加相关的代码,你只要按着填写就可以了,而Java则是输入"/**",它也会自动形成相关代码,具体代码如下:
C#
/// <summary>
/// 在此填写总体描述
///</summary>
/// <param name="name">这里填写参数name的描述</param>
public string ......
