import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Calendar;
import java.util.GregorianCalendar;

public class DateExample {

	public static void main(String[] args) {
		DateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy");
		System.out.println(dateFormat.format(DateUtils.getFirstDateOfMonth(2012, DateUtils.Month.FEBRUARY)));
		System.out.println(dateFormat.format(DateUtils.getLastDateOfMonth(2012, DateUtils.Month.FEBRUARY)));
		
		for (DateUtils.Month month : DateUtils.Month.values()) {
		  System.out.println(month.getDisplayName());
		}
	}
	
}

class DateUtils {
	enum Month {
		JANUARY, FEBRUARY, MARCH, APRIL, MAY, JUNE, JULY, AUGUST, SEPTEMBER, OCTOBER, NOVEMBER, DECEMBER;
		
		public String getDisplayName() {
			char[] charArray = name().toLowerCase().toCharArray();
			charArray[0] = Character.toUpperCase(charArray[0]);
			return new String(charArray);
		}
		
		public int getId() {
			return ordinal();
		}
	}
	
	public static Date getLastDateOfMonth(int year, Month month) {
		Calendar calendar = new GregorianCalendar(year, month.getId(), Calendar.DAY_OF_MONTH);
		calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
		return calendar.getTime();
	}
	
	public static Date getFirstDateOfMonth(int year, Month month) {
    Calendar calendar = new GregorianCalendar(year, month.getId(), Calendar.DAY_OF_MONTH);
    calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMinimum(Calendar.DAY_OF_MONTH));
    return calendar.getTime();		
	}
}