Java Data Type - 如何添加小时和分钟到即时

import java.time.Instant;
import java.time.temporal.ChronoUnit;

public class Main {

  public static void main(String[] args) {
    Instant t1 = Instant.now();
    long hours = 2;
    long minutes = 30;
    Instant t2 = t1.plus(hours, ChronoUnit.HOURS).plus(minutes,
        ChronoUnit.MINUTES);

    System.out.println(String.format("now %s and later %s", t1, t2));
  }
}