enumerated types

控制台手动输入。

package enums;

import java.util.Scanner;

public class EnumTest {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter  a size:(SMALL,MEDIUM,LARGE,EXTRA_LARGE)");
        String input = in.next().toUpperCase();
        Size size = Enum.valueOf(Size.class, input);
        System.out.println("size=" + size);
        System.out.println("abbreviation=" + size.getAbbreviation());
        if (size == size.EXTRA_LARGE)
            System.out.print("Good job--you paid attention to the _.");
    }
}

enum Size {
    SMALL("S"), MEDIUM("M"), LARGE("L"), EXTRA_LARGE("XL");

    private Size(String abbreviation) {
        this.abbreviation = abbreviation;
    }

    public String getAbbreviation() {
        return abbreviation;
    }

    private String abbreviation;
}