A brief introduction to <java> enumeration

1. Enum, enum keyword, equivalent to public final static.

2. For example:

An enumeration type named spiciness is defined first.

 Public enum spiciness {Not    , MILD, MEDIUM, Hot, flaming}

To test the enum again, this test method shows that it has the ToString () method, which conveniently displays the name of an enum instance.

 Public class Simpleenumuse {    publicstaticvoid  main (string[] args) {        =  Spiciness.medium;        System.out.println (Howhot);    }}

Output Result: MEDIUM

In addition, Enum also has the ordinal () method, which makes it easy to represent the order of declarations for a particular enum constant.

 Public class Enumorder {    publicstaticvoid  main (string[] args) {        for  (spiciness s:spiciness.values ()) {            + ", ordinal" + s.ordinal ());     }}}

Output Result:

Not, ordinal 0
MILD, ordinal 1
MEDIUM, ordinal 2
Hot, ordinal 3
Flaming, ordinal 4

A brief introduction to <java> enumeration