Java: Convert a give util date to a util date at the start of the day

kata.java

package katas;

import java.time.Instant;
import java.time.LocalDateTime;
import java.time.OffsetDateTime;
import java.time.ZoneId;
import java.util.Calendar;
import java.util.Date;

public class Main {

	public static void main(String[] args) {
		
		Calendar cal = Calendar.getInstance();
		cal.setTime(Date.from(Instant.now()));
		
		// Current Time
		System.out.println("current Time: "+cal.getTime());
		cal.set(Calendar.HOUR_OF_DAY, 0);
		cal.set(Calendar.MINUTE, 0);
		cal.set(Calendar.SECOND, 0);
		cal.set(Calendar.MILLISECOND, 0);

		// Start of the day - 1
		System.out.println("With Calendar: "+cal.getTime());

		// Start of the day using Java 8
		Date input = new Date();
		LocalDateTime d = input.toInstant().atZone(ZoneId.systemDefault()).toLocalDate().atStartOfDay();
		Date newdateatstart = Date.from(d.toInstant(OffsetDateTime.now(ZoneId.systemDefault()).getOffset()));
		System.out.println("With Java8 Api:"+newdateatstart);
	}

}