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  1. public class WordGram {
  2.     private String[] myWords;
  3.     private int myHash;
  4.  
  5.     public WordGram(String[] source, int start, int size) {
  6.         myWords = new String[size];
  7.         System.arraycopy(source, start, myWords, 0, size);
  8.         myHash = hashCode();
  9.     }
  10.  
  11.     public String wordAt(int index) {
  12.         if (index < 0 || index >= myWords.length) {
  13.             throw new IndexOutOfBoundsException("bad index in wordAt "+index);
  14.         }
  15.         return myWords[index];
  16.     }
  17.  
  18.     public int length(){
  19.         // TODO: Complete this method
  20.         return myWords.length;
  21.     }
  22.  
  23.     public String toString(){
  24.         String ret = "";
  25.         for (int k =0; k<myWords.length; k++) {
  26.             ret += myWords[k] + " " ;
  27.         }// TODO: Complete this method
  28.  
  29.         return ret.trim();
  30.     }
  31.  
  32.     public boolean equals(Object o) {
  33.         WordGram other = (WordGram) o;
  34.         if (length() != other.length()){
  35.             return false;
  36.         }
  37.         for (int k =0; k < myWords.length; k++) {
  38.             if(!myWords[k].equals(other.wordAt(k))){
  39.                 return false;
  40.             }
  41.         }// TODO: Complete this method
  42.         return true;
  43.  
  44.     }
  45.  
  46.     public WordGram shiftAdd(String word) {	
  47.         WordGram out = new WordGram(myWords, 0, myWords.length);
  48.         for (int k =0; k < myWords.length-1; k++) {
  49.             myWords[k]= myWords[k+1];
  50.         }
  51.         myWords[myWords.length - 1] = word;
  52.         // shift all words one towards 0 and add word at the end. 
  53.        // you lose the first word
  54.         // TODO: Complete this method
  55.         return out;
  56.     }
  57.     public int hashCode() {
  58.  
  59.         String s = "";
  60.         for (int k = 0; k < myWords.length; k++){
  61.             s += myWords[k];
  62.         }
  63.         //System.out.println ("s: " + s);  
  64.         return s.hashCode();
  65.     }
  66.  
  67. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
Main.java:1: error: class WordGram is public, should be declared in a file named WordGram.java
public class WordGram {
       ^
1 error
stdout
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Standard output is empty
https://ideone.com/Xj9sqM
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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