Java Code to Convert Binary to Decimal

Java has deal with many different situations. So Java Code Online is going to discuss a case when a number entered as binary is to be converted to a decimal number. A binary number which consists of only 1 and 0, while a decimal number is a number which consists of numbers between 0-9.

We normally use decimal numbers in our daily purposes. Binary numbers on the other hand are very important and used for computers data transfer.

The Java code for converting a binary number to a decimal number, starts by asking the user to enter a binary number. The result is a decimal number which is displayed to the user. In case the number entered is not a binary number, i.e. it contains numbers other then 0 and 1. In that a NumberFormatException will be thrown. I have catch this exception, so that the developer can use there custom message in that place.

The Java Code is displayed below:-

/////////////////////////////////////

package developer;

import java.util.Scanner;

public class BinaryToDecimal {

    public static void main(String[] args) {

      

        System.out.println("Enter a binary number: ");

        Scanner scanStr = new Scanner(System.in);

              

        int decimalNum = 0;      

              

        if(scanStr.hasNext())

        {   

            try

            {

                decimalNum = Integer.parseInt(scanStr.next(),2);

                System.out.println("Binary number in decimal is: "+decimalNum);  

            }

            catch(NumberFormatException nfe)

            {

                System.out.println("The number is not a binary number.");

            }

        }  

    }

}

/////////////////////////////////////

When this code is executed on my system, the output is as shown below.

/////////////////////////////////////

Enter a binary number:

10100011

The binary number in decimal is: 163

/////////////////////////////////////

In case the number entered is not a binary number, then the output is as shown below:-

/////////////////////////////////////

Enter a binary number:

123456

The number is not a binary number.

/////////////////////////////////////

Hope that I was able to make my point clear. If you liked the article then do post a comment. Kepp checking Java Code Online for more Java Codes.

Related Java Codes
Java Code to Convert Decimal to Binary