JAVA的枚举类举例

//FreshJuiceTest.java

class FreshJuice {
    enum FreshJuiceSize{SMALL, MEDIUM, LARGE}
    FreshJuiceSize size;
}
public class FreshJuiceTest{
    public static void main(String args[]){
        FreshJuice juice = new FreshJuice();
        juice.size = FreshJuice.FreshJuiceSize.MEDIUM;
        System.out.println(juice.size);
    }
}