找到枚举大小的更好方法是什么？

Question

可能重复:
枚举值().长度与私有字段

我想知道如何通过这些方法找到枚举的大小更好.

这样 - >

public enum Company {
        AUDI(4), BMW(5), CADILLAC(11), FORD(44), JAGUAR(45);
        private final int id;
        public final int length= Company.values().length;

        private Company(int id) {
            this.id = id;
        }
    }

要么

public enum Company {
        AUDI(4), BMW(5), CADILLAC(11), FORD(44), JAGUAR(45);
        private final int id;
        public final int length= 5;
        private Company(int id) {
            this.id = id;
        }
    }

Answer 1

给定 -

enum Widgets {TINY, SMALL, AVERAGE, BIG};

小部件的大小是:

Widgets.values().length