������ҧ����� Enum

[Admin]

package enums;

public class testEnum {

public static void main(String[] args) {
System.out.println(" Apple.GREEN ��� " Apple.GREEN);

Apple apple = Apple.RED;
System.out.println(" ����� ��� " apple);

switch (apple) {
case RED:
System.out.println("ᴧ");
break;
case GREEN:
System.out.println("����");
break;
}

System.out.println("----------------------------------");
for(Apple app : Apple.values()){
System.out.println(" ��� " app);
}

}

}


enum Apple{
RED, GREEN, YELLOW

}


Output:Apple.GREEN ��� GREEN
����� ��� RED
ᴧ
----------------------------------
��� RED
��� GREEN
��� YELLOW

[Admin]

enum Apple{
RED, GREEN, YELLOW; // ������ ; ���
private int price;
}// OK

enum Apple{
private int price; // Error
RED, GREEN, YELLOW;
}// Error

[Admin]

enum Apple{
RED(100), GREEN(199), YELLOW(999);

private int price;
Apple(int para){ price = para; } //������ comment ��÷Ѵ���� Compile Fail
int getPrice(){return price;};

}


������¡��

System.out.println(" ��� "+Apple.YELLOW.getPrice());

[Admin]

enum Apple{
RED(100), GREEN(199), YELLOW(999), BLACK; // BLACK ����դ��()
private int price;
Apple(int para){ price = para; }
Apple(){ } // BLACK Call this Constructor
int getPrice(){return price;};
}

System.out.println(" ��� " Apple.YELLOW.getPrice()); // ��� 999
System.out.println(" ��� " Apple.BLACK.getPrice()); // ��� 0

[Admin]

System.out.println(" CompareTo 1 : "+Apple.GREEN.compareTo(Apple.GREEN));
System.out.println(" CompareTo 2 : "+Apple.GREEN.compareTo(Apple.RED));
System.out.println(" CompareTo 3 : "+Apple.GREEN.compareTo(Apple.BLACK));

System.out.println(" CompareTo 4 : "+Apple.RED.compareTo(Apple.BLACK));

CompareTo 1 : 0
CompareTo 2 : 1
CompareTo 3 : -2
CompareTo 4 : -3