Java Data Type - 如何将1小时添加到即时

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

public class Main {

  public static void main(String[] args) {
    Instant timestamp = Instant.now();
    System.out.println(timestamp);
    System.out.println(timestamp.plus(1, ChronoUnit.HOURS));

  }
}