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;
}