Java Data Type - 如何修剪分钟和从Date对象的小时和秒

import static java.lang.System.out;
import static java.util.Calendar.HOUR_OF_DAY;
import static java.util.Calendar.MILLISECOND;
import static java.util.Calendar.MINUTE;
import static java.util.Calendar.SECOND;

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

public class Main {
  public static void main(String[] args) throws InterruptedException {
    Date date = new Date();
    Thread.sleep(1);
    Date other = new Date();
    out.printf("equals? = %s, hashCode? = %s %n", (date.equals(other)),
        (date.hashCode() == other.hashCode()));

    Date todayeOne = trim(date);
    Date todayTwo = trim(other);

    out.printf("equals? = %s, hashCode? = %s %n", (todayeOne.equals(todayTwo)),
        (todayeOne.hashCode() == todayTwo.hashCode()));

  }

  public static Date trim(Date date) {
    Calendar cal = Calendar.getInstance();
    cal.setTime(date);
    cal.set(HOUR_OF_DAY, 0);
    cal.set(MINUTE, 0);
    cal.set(SECOND, 0);
    cal.set(MILLISECOND, 0);
    return cal.getTime();
  }

}