The plusHours() method of LocalDateTime class is used to return a copy of this date-time with the specified hours added.
Syntax:
public LocalDateTime plusHours(long hours)
Parameter: It accepts a single parameter hours which specifies the hours to add which may be negative.
Return Value: This method returns a LocalDateTime based on this date-time with the hours added.
Exceptions: The programs throws a DateTimeException which is thrown if the result exceeds the supported hours range.
Below programs illustrate the YearMonth.plusHours() method in Java:
Program 1:
// Program to illustrate the plusHours() method  import java.util.*;import java.time.*;  public class GfG {    public static void main(String[] args)    {        LocalDateTime dt1            = LocalDateTime                  .parse("2018-01-11T10:15:30");          System.out.println("LocalDateTime with 15 hours added: "                           + dt1.plusHours(15));    }} |
Output:
LocalDateTime with 15 hours added: 2018-01-12T01:15:30
Program 2:
// Program to illustrate the plusHours() method  import java.util.*;import java.time.*;  public class GfG {    public static void main(String[] args)    {        LocalDateTime dt1            = LocalDateTime                  .parse("2018-01-11T08:15:30");          System.out.println("LocalDateTime with -2 hours added: "                           + dt1.plusHours(-2));    }} |
Output:
LocalDateTime with -2 hours added: 2018-01-11T06:15:30
Reference: https://docs.oracle.com/javase/10/docs/api/java/time/LocalDateTime.html#plusHours(long)
