enum 사용하여 상수 처리하기

public class RegionConstants {
	public static final int SEOUL = 1;
	public static final int BUSAN = 2;
	public static final int DAEGU = 3;
}

public enum RegionEnum {
	SEOUL, BUSAN, DAEGU
}

public class RegionTest {
	public void exec() {
		printRegion(RegionEnum.SEOUL);
	}
	public void printRegion(RegionEnum r) {
		System.out.println(r);
	}
}