Again i need help guys

Question

this time with a dead line {tonight} :(
anyway the user is supposed to enter "i am user i am user" & the program will output
i 2
am 2
user 2
this is the code
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
public class Try extends JFrame {
     private JLabel label;
     private JTextField field;
     private JTextArea area;
     private JScrollPane scroll;
     private int count;
     private String poprage="";
     public Try(){
          super("Application 3 / Word Occurence");
          getContentPane().setBackground(Color.CYAN);
          Container c = getContentPane();
          c.setLayout(new FlowLayout());
          label = new JLabel("Enter The Text Here");
          c.add(label);
          field = new JTextField(30);
          field.addActionListener(
               new ActionListener(){
                    public void actionPerformed(ActionEvent e){
                         StringTokenizer s = new StringTokenizer(e.getActionCommand());
                         count = s.countTokens();
                         while(s.hasMoreTokens()){
                              StringTokenizer z = new StringTokenizer(e.getActionCommand());
                              for(int i =0 ; i<count ;i++){
                                   int c=0;
                                   if(s.equals(z.nextToken())){
                                        c++;
                                   poprage += s+"\t"+c+"\n";}
          area.append(poprage);
         c.add(field);
          area = new JTextArea(10,30);
          area.setEditable(false);
          c.add(area);
          scroll = new JScrollPane(area);
          c.add(scroll);
          setSize(500,500);
          show();
     public static void main (String ar[]){
          Try a = new Try();
          a.addWindowListener(
               new WindowAdapter(){
                    public void windowClosing( WindowEvent e ){
                         System.exit(0);
}it gives me an exeption
Exception in thread main java.lang.NullPointerException
at Try.<init><Try.java.55>
at Try.main<Try.java.73>
first of all i did not take exeption handling or util package or data structure , so that no 1 insults me. O.K ??
second i really need ur help , thx in advance.
poprage.

Answer 1

first of all i did not take exeption handling or util
package or data structure , so that no 1 insults me.
O.K ??What do you mean you didn't "take" them? I can't imagine a whole class just for java exception handling or the util package...there are some things where you just have to read the magazine articles...
Anyway.
it gives me an exeption
Exception in thread main
java.lang.NullPointerException
at Try.<init><Try.java.55>
at Try.main<Try.java.73>
This means:
On line 73, in your main method, there's a call to Try's constructor.
On line 55, in Try's constructor, there's a null pointer exception.
Look on line 55. Look for a period (.). Something to the left of it is null.
You're the one with the original source code and an editor. It should be trivially simple for you to find line 55, whereas it's a pain for anyone reading your source on this forum.