Convert Hexadecimal number to Binary, Decimal and Octal in Java

gistfile1.txt

/**
 *
 * Java program to convert Hexadecimal to binary, decimal and Octal in Java.
 * Hexadecimal is base 16, Decimal number is base 10, Octal is base 8
 * and Binary is base 2 number which has just two numbers 0 and 1.
 * @author
 */
public class ConvertHexaToDecimal {

  
    public static void main(String args[]) {
        // Ask user to enter an Hexadecimal number in Console
        System.out.println("Please enter Hexadecimal number : ");
        Scanner scanner = new Scanner(System.in);
      
        String hexadecimal = scanner.next();
      
        //Converting Hexa decimal number to Decimal in Java
        int decimal = Integer.parseInt(hexadecimal, 16);
      
        System.out.println("Converted Decimal number is : " + decimal);
    
        //Converting hexa decimal number to binary in Java       
        String binary = Integer.toBinaryString(decimal);
        System.out.printf("Hexadecimal to Binary conversion of %s is %s %n", hexadecimal, binary );
      
        // Converting Hex String to Octal in Java
        String octal = Integer.toOctalString(decimal);
        System.out.printf("Hexadecimal to Octal conversion of %s is %s %n", hexadecimal, octal );
    }
}

Output:
Please enter Hexadecimal number :
A
Converted Decimal number is : 10
Hexadecimal to Binary conversion of A is 1010
Hexadecimal to Octal conversion of A is 12



Please enter Hexadecimal number :
-B
Converted Decimal number is : -11
Hexadecimal to Binary conversion of -B is 11111111111111111111111111110101
Hexadecimal to Octal conversion of -B is 37777777765