public static int sum(String str) {
    int result =0;
    String numberstr= "";
     char[] textchararr= str.toCharArray();
     for(int i=0; i<textchararr.length ;i++ ) {
         char c= textchararr[i];
         if(c>='0'&& c<= '9') {
             numberstr +=c ;
             if( i== textchararr.length -1) {
                 result += Integer.parseInt(numberstr);
             }
         }
         else if(!numberstr.equals("")) {
             result += Integer.parseInt(numberstr);
             numberstr ="";
         }
     }
    return result ;
}