java - Calculate variable String(010) with integer(1) where outcome is string(011) -

the user can insert random string can contains numbers. must been possible calculate integer.

the problem user insert string 010 + integer(1) result in 11;

but want return string 011

but user can enter numbers 001, 0001, etc

what best approach here? have try use

string.format("%05d", yournumber); not work variable strings 

i came across

string str = "abcd1234"; string[] part = str.split("(?<=\\d)(?=\\d)"); system.out.println(part[0]); system.out.println(part[1]); 

if use got new problem. how split number in right way.

any idea i'm missing

considering handling integer number (not binary )
try this:

string input ="001";//your user input     /**      * check here if input  number      */     int len=input.length();     int inputinteger=integer.parseint(input);     inputinteger+=1;      string output=string.format("%0"+len+"d", inputinteger);      system.out.println(output);