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

i tried to make it simple this was sth i had to deal with with my cryptography prj its not efficient but i hope it

    public String binarysum(String a, String b){
    int carry=0;
    int maxim;
    int minim;
    maxim=Math.max(a.length(),b.length());
    minim=Math.min(a.length(),b.length());         
    char smin[]=new char[minim];
    char smax[]=new char[maxim];
    if(a.length()==minim){
     for(int i=0;i-1;i--){
    st[k]=smin[i];
    k--;
    } 

     //   *************************** sum begins here
   for(int i=maxim-1;i>-1;i--){
   char x= smax[i];
   char y= st[i];
    if(x==y && x=='0'){
         if(carry==0)
             sum[i]='0';
         else if(carry==1){
             sum[i]='1';
             carry=0;
    }
   }
    else if(x==y && x=='1'){
        if(carry==0){
            sum[i]='0';
            carry=1;
        }
        else if(carry==1){
          sum[i]='1';
          carry=1;
        }
     }
     else if(x!=y){
        if(carry==0){
            sum[i]='1';
            }
        else if(carry==1){
          sum[i]='0';
          carry=1;
        }
       }        }
      String s=new String(sum);
     return s;
      }