I got bugs i can't figure the cause

Question

sorry i can't paste my coding since forum deny pasting more than 7500 length so i uploaded it there and please help me solve this problem Thank you!!!
[https://docs.google.com/document/edit?id=1D5idS1FMeO8zXkN-mUwXtlDUfjltd5BqDJiPRnLg2JI&hl=en&authkey=CP-lzvgH]

Answer 1

* @(#)app1.java
* @author
* @version 1.00 2010/7/22
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class person{
    String name;
    public person(String fname2){
        name=fname2;
class customer extends person{
    String emailaddr;
    String message;
    public customer(String fname3, String emailaddr2, String message2)
        super(fname3);
        emailaddr=emailaddr2;
        message=message2;
    public String DisplayCust()
        String name=super.name;
        int namelength=name.length();
        int emailength=emailaddr.length();
        int messagelength=message.length();
        String printingnamelength;
        String printingemaillength;
        String printingmessagelength;
        if(namelength<10)
            printingnamelength="0"+namelength;
        else
            printingnamelength=Integer.toString(namelength);
        if(emailength<10)
            printingemaillength="0"+emailength;
        else
            printingemaillength=Integer.toString(emailength);
        if(messagelength<10)
            printingmessagelength="0"+messagelength;
        else
            printingmessagelength=Integer.toString(messagelength);
        return printingnamelength+printingemaillength+printingmessagelength+name+emailaddr+message;
//Queue
class Queue
private int maxSize;
private customer[] queArray;
private int front;
private int rear;
private int nItems;
public Queue(int s) // constructor
maxSize = s;
queArray = new customer[maxSize];
front = 0;
rear = -1;
nItems = 0;
public void insert(String fname4, String email4, String message4) // put item at rear of queue
if(rear == maxSize-1) // deal with wraparound
rear = -1;
queArray[++rear] = new customer(fname4,email4,message4); // increment rear and insert
nItems++; // one more item
public String remove() // take item from front of queue
String temp = queArray[front++].DisplayCust(); // get value and incr front
if(front == maxSize) // deal with wraparound
front = 0;
nItems--; // one less item
return temp;
public String peekFront() // peek at front of queue
     return queArray[front].DisplayCust();
public boolean isEmpty() // true if queue is empty
return (nItems==0);
public boolean isFull() // true if queue is full
return (nItems==maxSize);
public int size() // number of items in queue
return nItems;
public class app1 implements ActionListener {
    //GUI design
    public void actionPerformed(ActionEvent ae)
        Object obj=ae.getSource();
        Queue theQueue = new Queue(5); // queue holds 5 items
        if(addmsgbtn==obj)
            theQueue.insert(custnametxt.getText(),emailtxt.getText(),messagetxt.getText());
        if(retrievebtn==obj)
            String output=theQueue.peekFront();
            String namelength=(output.substring(0, 2));
            String emailength=(output.substring(2, 4));
            String messagelength=(output.substring(4, 6));
            int namelengthINT=Integer.parseInt(namelength);
            int emailengthINT=Integer.parseInt(emailength);
            int messagelengthINT=Integer.parseInt(messagelength);
            custnametxt.setText(output.substring(6,namelengthINT));
            emailtxt.setText(output.substring(namelengthINT,emailengthINT));
            messagetxt.setText(output.substring(emailengthINT,messagelengthINT));
        if(exitbtn==obj)
            System.exit(0);
    public static void main(String args[])
        new app1();