Adding binary numbers

Question

Does anyone know how to add 2 binary numbers, entered as binary, in Java?

For example, 1010 + 10 = 1100.

Answer 1

you can write your own One.

long a =100011111111L;
long b =1000001111L;

int carry = 0 ;
long result = 0;

long multiplicity = 1;

while(a!=0 || b!=0 || carry ==1){
    if(a%10==1){
        if(b%10==1){
            result+= (carry*multiplicity);
            carry = 1;
        }else if(carry == 1){
            carry = 1;  
        }else{
            result += multiplicity;
        }
    }else if (b%10 == 1){
        if(carry == 1){
            carry = 1;
        }else {
            result += multiplicity; 
        }
    }else {
        result += (carry*multiplicity);
        carry = 0;
    }

    a/=10;
    b/=10;
    multiplicity *= 10;

}


System.out.print(result);

it works just by numbers , no need string , no need SubString and ...