大家好,乐天来为大家解答以下的问题，关于enum占多少个字节，enum 用法这个很多人还不知道,现在让我们一起来看看吧！
1、下面是一个例举的例子：public enum WeekDay { SUN(1, "Sunday", "SUN"), MON(2, "Monday", "MON"), TUE(3, "Tuesday", "TUE"), WED(4, "Wednesday", "WED"), THU(5, "Thursday", "THU"), FRI(6, "Friday", "FRI"), SAT(7, "Saturday", "SAT"); private String shortName; private String fullName; private int dayOfWeek; private WeekDay(int dayOfWeek, String name, String sname) { this.dayOfWeek = dayOfWeek; fullName = name; shortName = sname; } public static WeekDay getDay(int dayIndex) { switch (dayIndex) { case 1: return SUN; case 2: return MON; case 3: return TUE; case 4: return WED; case 5: return THU; case 6: return FRI; case 7: return SAT; } return null; } public String getShortName() { return shortName; } public int getDayOfWeek() { return dayOfWeek; } @Override public String toString() { return fullName; }}。
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