gistfile1.txt

class WordNgram{
  private int size;
  private String[] words ={};

  public WordNgram(int size){
    this.size = size;
  }

  public WordNgram(int size, String words){
    this.size = size;
    this.words = words.split(" ");
  }

  public String getWord(int size){
    String result = null;

    try {
      result =  this.toString().split(" ")[size].trim();
    } catch(ArrayIndexOutOfBoundsException e){
      System.out.println("index out of bounds");
      return "";
    }

    return result;
  }

  public String toString(){
    if (words.length == 0){
      String value = "";
      for ( int n=0; n<size; n++) {
        value = value + ",";
      }

      return value;
    }

    if (size > this.words.length) {
      String value = "";
      for ( int n=0; n<size; n++) {
        value = value + " " + words[n % words.length];
      }
      return value;
    }

    String result = "";
    int n = 0;
    while(true){
      try {
        String last = this.words[this.size + n - 1];
      } catch(ArrayIndexOutOfBoundsException e){
        return result;
      }

      for (int i = n; i <= (this.size + n - 1); i++) {
        result += " " + words[i]; 
      }

      result += "\n";

      n++;
    }
  }

  public static void main(String[] args) {
    WordNgram w1 = new WordNgram(5, "En katt sover i korgen .");
    System.out.println(w1.getWord(2));
  }
}