关于java Enum
package rest;
/*created by fanqunsong
Date : 2018/2/23
Time : 10:56
*/
public class EnumTest {
enum Day{MONDAY, TUESDAY, WEDNESDAY,
THURSDAY, FRIDAY, SATURDAY, SUNDAY}
public static void main1(String[] args) {
Day day = Day.MONDAY;
System.out.println(day);
}
public static void main(String[] args) {
Day[] days = new Day[]{Day.MONDAY, Day.TUESDAY, Day.WEDNESDAY,
Day.THURSDAY, Day.FRIDAY, Day.SATURDAY, Day.SUNDAY};
for (int i = 0; i < days.length; i++) {
System.out.println("day["+i+"].ordinal():"+days[i].ordinal());
}
System.out.println("-------------------------------");
System.out.println("days[0].compareTo(days[1]):"+days[0].compareTo(days[1]));
System.out.println("days[0].compareTo(days[2]):"+days[0].compareTo(days[2]));
//获取该枚举对象的Class对象引用,当然也可以通过getClass方法
Class<?> clazz = days[0].getDeclaringClass();
System.out.println("clazz:"+clazz);
System.out.println("-------------------------------");
System.out.println("days[0].name():"+days[0].name());
System.out.println("-------------------------------");
System.out.println("days[0].toString():"+days[0].toString());
System.out.println("-------------------------------");
System.out.println("days[0]:"+days[0]);
}
}
输出为
day[0].ordinal():0
day[1].ordinal():1
day[2].ordinal():2
day[3].ordinal():3
day[4].ordinal():4
day[5].ordinal():5
day[6].ordinal():6
-------------------------------
days[0].compareTo(days[1]):-1
days[0].compareTo(days[2]):-2
clazz:class rest.EnumTest$Day
-------------------------------
days[0].name():MONDAY
-------------------------------
days[0].toString():MONDAY
-------------------------------
days[0]:MONDAY
---------------------------------------------------------------------
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