MostFrequentSubstring

public class MostFrequentSubstring {
    public static void main (String[] args) throws IOException {
        CBHT<String,Integer> tabela = new CBHT<String,Integer>(300);
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        String word = br.readLine().trim();
        int maxpojavuvanja =0 ;
        String najcest="";

        /*
        *
        * Vashiot kod tuka....
        *
        */
        for(int c = 0 ; c < word.length() ; c++ )
          {
             for(int i = 1 ; i <= word.length() - c ; i++ )
             {
                int brpojavuvanja;
                String sub = word.substring(c, c+i);
                if(tabela.search(sub)==null){
                    tabela.insert(sub, 1);
                    brpojavuvanja=1;
                }
                else{
                    tabela.search(sub).element.value++;
                    brpojavuvanja=tabela.search(sub).element.value;
                }
                if(brpojavuvanja>maxpojavuvanja){
                    maxpojavuvanja=brpojavuvanja;
                    najcest=sub;
                }
                if(brpojavuvanja==maxpojavuvanja&&sub.length()>najcest.length()){
                    maxpojavuvanja=brpojavuvanja;
                    najcest=sub;
                }
                if(brpojavuvanja==maxpojavuvanja && sub.length()==najcest.length() && sub.compareTo(najcest)<0){
                    maxpojavuvanja=brpojavuvanja;
                    najcest=sub;
                }
             }

          }
        System.out.println(""+najcest);


    }
}