UUID compareTo() Method in Java with Examples
Last Updated :
27 Dec, 2018
The compareTo() method of UUID class in Java is used to compare one UUID value with another specified UUID. It returns -1 if this UUID is less than the value, 0 if this UUID is equal to the value, and 1 if this UUID is greater than the value.
Syntax:
UUID_1.compareTo(UUID_2)
Parameters: The method takes one parameter UUID_2 to which the UUID_1 is to be compared.
Return Value: The method returns -1, 0 or 1 depending on whether this UUID_1 is less than, equal to or greater than the other UUID_2.
Below programs illustrate the working of compareTo() method:
Program 1: Checking if both the UUIDs are equal.
import java.util.*;
public class UUID_Demo {
public static void main(String[] args)
{
UUID UUID_1
= UUID
.fromString(
"5fc03087-d265-11e7-b8c6-83e29cd24f4c" );
UUID UUID_2
= UUID
.fromString(
"5fc03087-d265-11e7-b8c6-83e29cd24f4c" );
System.out.println( "UUID_1: "
+ UUID_1.clockSequence());
System.out.println( "UUID_2: "
+ UUID_2.clockSequence());
System.out.println( "Comparison Value: "
+ UUID_1.compareTo(UUID_2));
}
}
|
Output:
UUID_1: 14534
UUID_2: 14534
Comparison Value: 0
Program 2: When UUID_1 is less than UUID_2, the method returns -1.
import java.util.*;
public class UUID_Demo {
public static void main(String[] args)
{
UUID UUID_1
= UUID
.fromString(
"58e0a7d7-eebc-11d8-9669-0800200c9a66" );
UUID UUID_2
= UUID
.fromString(
"5fc03087-d265-11e7-b8c6-83e29cd24f4c" );
System.out.println( "UUID_1: "
+ UUID_1.clockSequence());
System.out.println( "UUID_2: "
+ UUID_2.clockSequence());
System.out.println( "Comparison Value: "
+ UUID_1.compareTo(UUID_2));
}
}
|
Output:
UUID_1: 5737
UUID_2: 14534
Comparison Value: -1
Program 3: When UUID_1 is greater than UUID_2, the method returns 1.
import java.util.*;
public class UUID_Demo {
public static void main(String[] args)
{
UUID UUID_1
= UUID
.fromString(
"5fc03087-d265-11e7-b8c6-83e29cd24f4c" );
UUID UUID_2
= UUID
.fromString(
"58e0a7d7-eebc-11d8-9669-0800200c9a66" );
System.out.println( "UUID_1: "
+ UUID_1.clockSequence());
System.out.println( "UUID_2: "
+ UUID_2.clockSequence());
System.out.println( "Comparison Value: "
+ UUID_1.compareTo(UUID_2));
}
}
|
Output:
UUID_1: 14534
UUID_2: 5737
Comparison Value: 1
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