public class comptersimilair {

public static void imprimer(ArrayList a) {
        for (int i = 0; i < a.size(); i++) {

            System.out.println(a.get(i));
        }
        System.out.println();
    }public static void  tri(ArrayList<String> a){ArrayList X = new ArrayList();

for (int i = 0;i< a.size()-1; i++) {




for(int j = i+2 ;j< a.size(); j++){

    String deuxfois = (String) X.get(j);
}

}
}public static void main(String args[]){
    ArrayList<String> arr = new ArrayList<String>() ;
try {
  JFileChooser dial = new JFileChooser();
  int res = dial.showOpenDialog(null);
  if (res == JFileChooser.APPROVE_OPTION) {
    File f = dial.getSelectedFile();
    InputStream is = new FileInputStream(f);
    Reader r = new InputStreamReader(is);
    BufferedReader br = new BufferedReader(r);
    String ligne ;
    while((ligne = br.readLine())!=null){
        arr.add(ligne);

    }

    is.close();
  }
} catch (IOException e) {
  System.err.println("Problème de lecture du fichier blablabla.txt");
}
tri(arr);

imprimer(arr); }}