Java Data Type How to - Create start time for a Month

Question

We would like to know how to create start time for a Month.

Answer

/*ww w . j a v  a  2 s.co  m*/
import java.util.Calendar;
import java.util.Date;

public class Main {
  public static void main(String[] argv){
    System.out.println(firstTimeOfMonth(new Date()) );
  }
  
  
  public static Date firstTimeOfMonth(Date date) {
    Calendar cal = Calendar.getInstance();
    cal.setTime(date);
    cal.set(Calendar.DAY_OF_MONTH, cal.getActualMinimum(Calendar.DAY_OF_MONTH));
    cal.set(Calendar.HOUR_OF_DAY, cal.getActualMinimum(Calendar.HOUR_OF_DAY));
    cal.set(Calendar.MINUTE, cal.getActualMinimum(Calendar.MINUTE));
    cal.set(Calendar.SECOND, cal.getActualMinimum(Calendar.SECOND));
    cal.set(Calendar.MILLISECOND, cal.getActualMinimum(Calendar.MILLISECOND));
    return cal.getTime();
  }
}

The code above generates the following result.