The compareTo() method of OffsetTime class in Java compares this time to another time and returns zero if they are equal or a positive or negative integer depending on the comparison result.
Syntax:
public int compareTo(OffsetTime other)
Parameter: This method accepts a single mandatory parameter other which specifies the other time which will be compared with.
Return Value: It returns the comparator value. It returns a negative value if the other date is less or a positive value if greater.
Exceptions: The function throws NullPointerException if the other date which is passed is null.
Below programs illustrate the compareTo() method:
Program 1 :
// Java program to demonstrate the compareTo() method  import java.time.OffsetTime;  public class GFG {    public static void main(String[] args)    {          // Parses the time        OffsetTime time1            = OffsetTime.parse("15:30:30+07:00");          // Parses the time        OffsetTime time2            = OffsetTime.parse("15:30:30+07:00");          // gets the offset time1        System.out.println("time1: "                           + time1);          // gets the offset time2        System.out.println("time1: "                           + time2);          System.out.println("time1 when compared"                           + " to time2 returns: "                           + time1.compareTo(time2));    }} |
Output:
time1: 15:30:30+07:00 time1: 15:30:30+07:00 time1 when compared to time2 returns: 0
Program 2 :
// Java program to demonstrate the compareTo() method  import java.time.OffsetTime;  public class GFG {    public static void main(String[] args)    {          // Parses the time        OffsetTime time1            = OffsetTime.parse("15:30:30+07:00");          // Parses the time        OffsetTime time2            = OffsetTime.parse("12:10:30+07:00");          // gets the offset time1        System.out.println("time1: "                           + time1);          // gets the offset time2        System.out.println("time1: "                           + time2);          System.out.println("time1 when compared"                           + " to time2 returns: "                           + time1.compareTo(time2));    }} |
Output:
time1: 15:30:30+07:00 time1: 12:10:30+07:00 time1 when compared to time2 returns: 1
Program 3: :
// Java program to demonstrate the compareTo() method  import java.time.OffsetTime;  public class GFG {    public static void main(String[] args)    {          // Parses the time        OffsetTime time1            = OffsetTime.parse("15:30:30+07:00");          // Parses the time        OffsetTime time2            = OffsetTime.parse("17:10:30+07:00");          // gets the offset time1        System.out.println("time1: "                           + time1);          // gets the offset time2        System.out.println("time1: "                           + time2);          System.out.println("time1 when compared"                           + " to time2 returns: "                           + time1.compareTo(time2));    }} |
Output:
time1: 15:30:30+07:00 time1: 17:10:30+07:00 time1 when compared to time2 returns: -1
Reference: https://docs.oracle.com/javase/8/docs/api/java/time/OffsetTime.html#compareTo-java.time.OffsetTime-
