Set date to the end of the day

import java.util.Calendar;
import java.util.Date;

public class Main {
  public static Date getEnd(Date date) {
      if (date == null) {
          return null;
      }
      Calendar c = Calendar.getInstance();
      c.setTime(date);
      c.set(Calendar.HOUR_OF_DAY, 23);
      c.set(Calendar.MINUTE, 59);
      c.set(Calendar.SECOND, 59);
      c.set(Calendar.MILLISECOND, 999);
      return c.getTime();
  }
}