/**
 * WordCounter: counts the number of a few words
 * 
 * @author Clark F. Olson
 * @version 1.0
 */


import java.util.Scanner;


public class WordCounter {
    public static final int SIZE = 4;
    private String[] wordArray;
    private int[] occurrences;
    
    /**
     * WordCounter(): allocate and initialize the word array and the counter array
     * pre:  SIZE > 0
     * post: wordArray is initialized to the words of interest 
     *       and the counter array (occurrences) will be initialized to zeroes
     */
    public WordCounter() {
        wordArray = new String[SIZE];
        occurrences = new int[SIZE];
        
        wordArray[0] = "the";
        wordArray[1] = "not";
        wordArray[2] = "memory";
        wordArray[3] = "program";
        
        for (int i = 0; i < SIZE; i++) {
            occurrences[i] = 0;
        }
    }
    
    /**
     * countOccurrences: Read all of the words in the wordFile and count the
     *                   number of occurrences of words in the wordArray
     * pre: wordArray and occurrences must be allocated and initialized
     * post: occurrences will hold the number of occurrences of the words in wordArray
     */
    public void countOccurrences(Scanner wordFile) {
        while (wordFile.hasNext()) {
            String word = wordFile.next();
            
            for (int i = 0; i < SIZE; i++) {
                if (wordArray[i].equals(word)) {
                    occurrences[i]++;
                } 
            }
        }
    }
    
    /**
     * displayTable: output the table of occurrences
     * pre: countOccurrences must have been called
     * post: the table is output to the console window
     */
    public void displayTable() {
        for (int i = 0; i < SIZE; i++) {
            System.out.print(wordArray[i]);
            
            // Output sufficient spaces so that the occurrences are lined up correctly.
            for (int j = 0; j < 20 - wordArray[i].length(); j++) {
                System.out.print(" ");
            }
            System.out.println(occurrences[i]);
        }
    }
}