Help to count number of words and time it

Question

Hi,
I need help in inputting a text file using a file browser into a JTextArea and then count the number of occurance of each words in the file and display the time it takes in a JTextField.
Right now I am able to come up with the idea of creating an Array to list all the words but I am still unable to count them. And by extending an abstract class to create the array class. Below is attached my abstract class.
import java.io.*;
import java.util.Observable;
import java.util.StringTokenizer;
public abstract class AbstractWordCounter extends Observable
     /** Amount of time required to count words in the most recently read file. */
     protected long readTime;
     /** DELIMETERS used in this WordCounter */
     protected String DELIMETERS;
     /** By default, any AbstractWordCounter will have is delimeters set to any non-letter ASCII character */
     public AbstractWordCounter()
          this.readTime = -1;
          DELIMETERS = "";
          // Add any non-letter ASCII character to the list of tokens.
          for(int i = 0; i < 256; i++)
               if( !Character.isLetter( (char)i  ) )
                    DELIMETERS += Character.toString( (char)i);
     /** Get the delimeters used in this WordCounter */
     public String getDelimeters()
          return DELIMETERS;
     /** Change the delimeters used in this WordCounter
      * @param newDelimeters the new delimeters to be used
     public void setDelimeters(String newDelimeters)
          DELIMETERS = newDelimeters;
      *@return    The number of unique words in this WordCountItem object
     public abstract int getSize();
     /** @return  The total number of words counted by this WordCounter */
     public abstract int getTotalNumWords();
     /** Add a String to this WordCounter
      * @param s the String s is converted to lower-case.  If the lower-case String is already in the list, it's count is
      *        incremented.  Otherwise it is added to the list and its count is set to 1.
     public abstract void add(String s);
      * Get the ith WordCountItem
      *@param  i  must be between 0 and size - 1 (inclusive)
      *@return    The WordCountItem stored at the ith location
     public abstract WordCountItem getWordCountItem(int i);
      *  Clear this WordCounter.  After this method runs, this.size == 0.
     public abstract void clearCount();
     /** @return The amount of time (in milliseconds) that was required to read the most recent file */
     public long getReadTime()
          return this.readTime;
      *  Reads the file.  Converts each word in the file to lower case and adds it to this
      *  AbstractWordCounter.  The AbstractWordCounter is cleared before reading the new file.
      *  The time required to read the file and count the words is recorded.
      *@param  fileName  file to be opened.
      *@throws FileNotFoundException
     public final void readFile(String fileName) throws FileNotFoundException
          // Clear this AbstractWordCounter.  Open the file and count the words in the file.
}Then the time I have come up so far is in the class that extends the abstract class above and the code is as:
public long getReadTime()
          return this.readTime;
     }and I have a hard time to actually display this in a JTextField as it says non-static cannot be applied to a static content and if I change the method into static, another error of overiding the abstract occurs...
I am totally lost for these errors. And I am still unable to create a file browser to find a file. For now I just write a complete path to open the file.
would someone could point me the right direction for this problem... Thanks in advance

Answer 1

Crosspost: http://forum.java.sun.com/thread.jsp?forum=31&thread=521763&tstart=0&trange=15