Help regarding Stacks and Queues.!!!!!!Please....

Question

I have a working program right now..But it lacks some things to be done..It already does the stacks and queues..But still it doesnt print the info on the desired output file outTwo.dat..Both the stacks and queues should be printed on it..Also it has to compute the total commission on categories 1 and 2...and put it again on the outTwo.dat..Any kind hearted people would want to help me here?Here's the assignment detail...Thank YOU!!!!
Q2. Linked List
a.     create a compile AStack class, and a AQueue class similar to the text
b.     provide an application that will:
�     instantiate an AStack object and an AQueue object
�     create a property object for each data line read from the input file assign4.dat
�     push it ti the stack if its is category 1 property; queue if its is category 2; ignore all others
�     print a title called category 1 to an output file called outTwo.dat
�     after printing a few blank lines to outTwo.dat, print a title called category 2 to outTwo.dat
�     traverse the queue and print it to the same output file outTwo.dat
�     print the total commission earned on this category of property to outTwo.dat
Note that for this question you should also print out and submit outTwo.dat. Have Fun!
//This is the program I have done so far....
import java.io.*;
import java.util.StringTokenizer;
public class TestSQ {
     public static void readFileSQ(AStack s, AQueue q)
          try {
FileReader inStream=new FileReader("assign4.dat");
BufferedReader ins= new BufferedReader(inStream);
FileWriter outStream=new FileWriter("outTwo.dat");
PrintWriter outs= new PrintWriter(outStream);
String line;
int category;
double price;
String categoryString;
String priceString;
StringTokenizer st;
while((line=ins.readLine())!=null) {
st=new StringTokenizer(line," ");
if(st.countTokens()==2){
categoryString = st.nextToken();
priceString = st.nextToken();
try{
category = Integer.parseInt(categoryString);
price = Double.parseDouble(priceString);
Property myProperty = new Property(category, price);
myProperty.setCommissionRate();
myProperty.getCommission();
     if(category==1)
s.push(myProperty);
outs.println(s.toString());
if(category==2)
                         q.insert(myProperty);
                         outs.println(q.toString());
}catch(NumberFormatException nfe){
System.out.println("error while parsing Integer: "+categoryString+"/"+priceString);
else
System.out.println("invalid number of elements in line: " +st.countTokens());
catch (IOException e) {
System.out.println("i/o error:"+e.getMessage());
e.printStackTrace();
     public static void showStack(AStack s){
          while(!s.isEmpty()){
               Object line=s.pop();
               System.out.println(line);
public static void main(String args[])
     AStack stackOfProperty=new AStack();
     AQueue queueOfProperty=new AQueue();
     readFileSQ(stackOfProperty,queueOfProperty);
     showStack(stackOfProperty);
     System.out.println();
     System.out.println(queueOfProperty.toString());
}

Answer 1

import java.io.*;
import java.util.StringTokenizer;
public class TestSQ {
     public static void readFileSQ(AStack s, AQueue q)
          try {
            FileReader inStream=new FileReader("assign4.dat");
            BufferedReader ins= new BufferedReader(inStream);
            FileWriter outStream=new FileWriter("outTwo.dat");
            PrintWriter outs= new PrintWriter(outStream);
            String line;
            int category;
            double price;
            String categoryString;
            String priceString;
            StringTokenizer st;
             while((line=ins.readLine())!=null) {
                st=new StringTokenizer(line," ");
                if(st.countTokens()==2){
                    categoryString = st.nextToken();
                    priceString = st.nextToken();
                    try{
                        category = Integer.parseInt(categoryString);
                        price = Double.parseDouble(priceString);
                        Property myProperty = new Property(category, price);
                        myProperty.setCommissionRate();
                        myProperty.getCommission();
                            if(category==1)
                        s.push(myProperty);
                      //  outs.println(s.toString());
                        else if(category==2)
                             q.insert(myProperty);
                             outs.println(q.toString());
                    }catch(NumberFormatException nfe){
                        System.out.println("error while parsing Integer: "+categoryString+"/"+priceString);
                else
                    System.out.println("invalid number of elements in line: " +st.countTokens());
            outs.close();
            ins.close();
        catch (IOException e) {
            System.out.println("i/o error:"+e.getMessage());
            e.printStackTrace();
     public static void showStack(AStack s){
          while(!s.isEmpty()){
               Object line=s.pop();
               System.out.println(line);
    public static void main(String args[])
         AStack stackOfProperty=new AStack();
         AQueue queueOfProperty=new AQueue();
         readFileSQ(stackOfProperty,queueOfProperty);
         showStack(stackOfProperty);
         System.out.println();
         System.out.println(queueOfProperty.toString());
   }//This is the updated version of my program..Now the ouput file works now, but then it shows different ouput..Thats only for the queue.I dont know about the stack..Tnx for looking...