Program to convert binary to decimal number.

package javaprgms;

public class BinaryToDecimal {

    public int getDecimalFromBinary(int binary){

        

        int decimal = 0;

        int power = 0;

        while(true){

            if(binary == 0){

                break;

            } else {

                int tmp = binary%10;

                decimal += tmp*Math.pow(2, power);

                binary = binary/10;

                power++;

            }

        }

        return decimal;

    }

    

    public static void main(String a[]){

        BinaryToDecimal bd = new BinaryToDecimal();

        System.out.println("11 ===> "+bd.getDecimalFromBinary(11));

        System.out.println("110 ===> "+bd.getDecimalFromBinary(110));

        System.out.println("100110 ===> "+bd.getDecimalFromBinary(100110));

    }

}

Output: 

11 ===> 3

110 ===> 6

100110 ===> 38