----------------------

WordData :

import java.util.ArrayList;

public class WordData {

private String word;

private ArrayList lineNumbers;

private int WordCount;

public WordData(String word, ArrayList lineNumbers, int wordCount) {

this.word = word;

this.lineNumbers = lineNumbers;

WordCount = wordCount;

}

public String getWord() {

return word;

}

public ArrayList getLineNumbers() {

return lineNumbers;

}

public int getWordCount() {

return WordCount;

}

public void setWord(String word) {

this.word = word;

}

public void setLineNumbers(ArrayList lineNumbers) {

this.lineNumbers = lineNumbers;

}

public void setWordCount(int wordCount) {

WordCount = wordCount;

}

@Override

public String toString() {

String res = word + " appears " + WordCount + " times on " + lineNumbers.size() + " lines: ";

int i=0;

for(i=0;i

res += lineNumbers.get(i) + ",";

}

res +=( lineNumbers.get(i) +"..." + lineNumbers.get(lineNumbers.size()-1));

return res;

}

@Override

public boolean equals(Object other) {

// TODO Auto-generated method stub

WordData obj = (WordData) other;

return word.equals(obj.word);

}

int compareTo(Object other) {

WordData obj = (WordData) other;

if(this.WordCount > obj.WordCount) {

return -1;

}else if(this.WordCount == obj.WordCount) {

return 0;

}

else

return 1;

}

}

------------------------------

WordDataArrayList :

import java.util.ArrayList;

public class WordDataArrayList extends ArrayList {

/**

* method to add the occurrence of a word on a line

*/

public void add(int line, String word) {

/**

* defining an array list of integers to create a new WordData object

*/

ArrayList lines = new ArrayList();

//adding the given line number

lines.add(line);

//creating a word data object

WordData w = new WordData(word, lines, 1);

//checking if the list already contains the given word

if (contains(w)) {

//getting the index of the word data

int index = indexOf(w);

//checking if the current line number is already added

if (!get(index).getLineNumbers().contains(line)) {

//adding the line number

get(index).getLineNumbers().add(line);

}

//incrementing the word count

get(index).setWordCount(get(index).getWordCount() + 1);

} else {

//word not on the list, adding it

super.add(w);

}

}

@Override

public String toString() {

String data = "";

/**

* iterating through all word data elements and appending to a String variable in proper format

*/

for (int i = 0; i

WordData w = get(i);

data += w.getWord() + "(" + w.getWordCount() + " "

+ w.getLineNumbers().size() + ")";

data += "(";

for (int j = 0; j

data += w.getLineNumbers().get(j) + " ";

}

data += "); ";

}

return data;

}

}

-------------------------

TestA4 :

public class TestA4 { public static void main(String[] args) { WordDataArrayList test = new WordDataArrayList(); try{ System.out.println("Testing WordDataArrayList basic operation: "+ "==========================================="); System.out.println("Should be empty list: "+test+" ----------"); test.add(99,"at"); System.out.println("Should be at(1 1)(99): "+test+" ----------"); test.add(103,"at"); System.out.println("Should be at(2 2)(99 103): "+test+" ----------"); test.add(103,"be"); System.out.println("Should be at(2 2)(99 103) and be(1 1)(103): "+test+" ----------"); } catch(Exception e){ System.out.println("Basic WordDataArrayList tests failed"); } try{ System.out.println(" Testing WordData equals and compareTo: "+ "======================================"); System.out.println("should be false: "+test.get(0).equals(test.get(1))); System.out.println("should be true: "+test.get(0).equals(test.get(0))); System.out.println("negative/positive may be reversed if \"be\" comes before \"at\":"); System.out.println("should be negative: "+test.get(0).compareTo(test.get(1))); System.out.println("should be 0: "+test.get(0).compareTo(test.get(0))); System.out.println("should be positive: "+test.get(1).compareTo(test.get(0))); } catch(Exception e){ System.out.println("WordData equals/compareTo tests failed"); } try{ System.out.println(" Testing WordDataArrayList additional operation: "+ "==============================================="); for(int i=0; i

} catch(Exception e){ System.out.println("WordScanner tests failed"); } } }

----------------------------

TestWordScanner :

public class TestWordScanner { public static final int minWordLength = 1; public static String line = "I'm sure _I_ shan't be able! I shall be a great deal too far off to trouble myself"+ " about you: you must manage the best way you can;--but I must be kind to them,' thought"+ " Alice, 'or perhaps they won't walk the way I want to go!"; public static void main(String[] args) { WordScanner getWords = new WordScanner(line,minWordLength); String word; do { word = getWords.nextWord(); if(word != null) System.out.println(word); } while(word != null); } }

PART 3: THe WORDSCANNER CLASS- You will need to pick out all of the individual words in a file that contains a book. The scanner class can find "tokens" (sequences of non-blank characters) but that is not the same as finding "words". So once again a customized class should be created