Java在枚举类型中增加自定义方法详解

public enum OzWitch {
    // Instances must be defined first, before methods:
    WEST("Miss Gulch, aka the Wicked Witch of the West"),
    NORTH("Glinda, the Good Witch of the North"),
    EAST("Wicked Witch of the East, wearer of the Ruby " + "Slippers, crushed by Dorothy's house"),
    SOUTH("Good by inference, but missing");
    private String description;

    // Constructor must be package or private access:
    private OzWitch(String description) {
        this.description = description;
    }

    public String getDescription() {
        return description;
    }

    public static void main(String[] args) {
        for (OzWitch witch : OzWitch.values()) {
            System.out.println(witch + ": " + witch.getDescription());
        }
    }
}

import java.util.stream.Stream;

public enum SpaceShip {
    SCOUT, CARGO, TRANSPORT,
    CRUISER, BATTLESHIP, MOTHERSHIP;

    @Override
    public String toString() {
        String id = name();
        String lower = id.substring(1).toLowerCase();
        return id.charAt(0) + lower;
    }

    public static void main(String[] args) {
        Stream.of(values()).forEach(System.out::println);
    }
}