Byte compareTo() method in Java with examples

Last Updated : 11 Jul, 2025
The compareTo() method of Byte class is a built in method in Java which is used to compare the given Byte type object with the instance of Byte invoking the compareTo() method. Syntax 
ByteObject.compareTo(Byte a)
Parameters: It takes a Byte type object a as input which is to be compared with the instance of the Byte object calling the compareTo method. Return Value: It returns an int value. It returns:
  • 0 if 'a is equal to 'b,
  • a positive value 'a' is greater than 'b',
  • a negative value 'b' is greater than 'a'
Below is the implementation of compareTo() method in Java: Example 1: Java 
// Java code to demonstrate
// Byte compareTo() method

class GFG {
    public static void main(String[] args)
    {

        // creating a Byte object
        Byte a = new Byte("20");

        // creating a Byte object
        Byte b = new Byte("20");

        // compareTo method in Byte class
        int output = a.compareTo(b);

        // printing the output
        System.out.println("Comparing " + a
                           + " and " + b + " : "
                           + output);
    }
}
Output: 
Comparing 20 and 20 : 0
Example 2: Java 
// Java code to demonstrate
// Byte compareTo() method

class GFG {
    public static void main(String[] args)
    {

        // creating a Byte object
        Byte a = new Byte("20");

        // creating a Byte object
        Byte b = new Byte("10");

        // compareTo method in Byte class
        int output = a.compareTo(b);

        // printing the output
        System.out.println("Comparing " + a
                           + " and " + b + " : "
                           + output);
    }
}
Output: 
Comparing 20 and 10 : 10
Example 3: Java 
// Java code to demonstrate
// Byte compareTo() method

class GFG {
    public static void main(String[] args)
    {

        // creating a Byte object
        Byte a = new Byte("10");

        // creating a Byte object
        Byte b = new Byte("20");

        // compareTo method in Byte class
        int output = a.compareTo(b);

        // printing the output
        System.out.println("Comparing " + a
                           + " and " + b + " : "
                           + output);
    }
}
Output: 
Comparing 10 and 20 : -10
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