Get last Date of This Month

import java.util.Calendar;

public final class DateTimeUtil {
  public static final String tsDefaultFormats[] = { "yyyy-MM-dd HH:mm:ss",
      "yyyy-MM-dd", "HH:mm:ss", "HH:mm", "yyyy-MM" };

  public static final int getlastDateofThisMonth(int month, int year) {
    Calendar calendar = Calendar.getInstance();
    if (year > -1) {
      calendar.set(Calendar.YEAR, year);
    }

    if (month > -1) {
      month--;
      calendar.set(Calendar.MONTH, month);
    }

    return calendar.getActualMaximum(Calendar.DATE);
  }
}