JAVA - MATH - Binary Calculate

BASIC VERSION  (Length Limit)

 public class gfg {

 

    // Function to add two binary strings

    static String add_Binary(String x, String y)

    {

  

        int num1 = Integer.parseInt(x,2);

        //converting binary string into integer(decimal number)

       

        int num2 = Integer.parseInt(y,2);

        //converting binary string into integer(decimal number)

       

       

        int sum = num1 + num2;

        // Adding those two decimal numbers and storing in sum

         

        String result = Integer.toBinaryString(sum);

        //Converting that resultant decimal into binary string

 

        return result;

    }

 

    // The Driver code

    public static void main(String args[])

    {

        String x = "011011", y = "1010111";

 

        System.out.print(add_Binary(x, y));

    }

}




HARDCODE VERSION  (No Length Limit)

public class BinaryAdd {
    public static void main(String[] args)   {
        String a = "111";
        String b = "100";

        StringBuilder res = new StringBuilder();
        int i = a.length() - 1;//3 -1 = 2 //
        int j = b.length() - 1;//3 -1 = 2
        int carry = 0;
        while(i >= 0 || j >= 0){
            int sum = carry;  //0 // 0
            if(i >= 0) sum += a.charAt(i--) - '0';  //1 53-52 =1 -0 = 1  // sum = 1 // 1
            if(j >= 0) sum += b.charAt(j--) - '0'; //1
            carry = sum > 1 ? 1 : 0; //1 = 1 = carry = 0
            res.append(sum % 2); // 110
        }
        if(carry != 0) res.append(carry);
        System.out.println( res.reverse().toString());
    }
}