Creating an arrays of objects from a class

I was wondering does any one know how to create an array of objects from a class?
I am trying to create an array of objects of a class.
class name ---> Class objectArray[100] = new Class;
I cant seem to make a single class but i need to figure out how to create an array of objects.
I can make a normal class with Class object = new Class

There are four lines of code in your for-loop that actually do something:
for(index = 0; index < rooms.length; index++) {
/*1*/  assignWidth.setWidth(Double.parseDouble(in.readLine()));
/*2*/  rooms[index] = assignWidth;
/*3*/  assignLength.setWidth(Double.parseDouble(in.readLine());
/*4*/  rooms[index] = assignLength;
}1.) Sets the width of an object, that has been instantiated outside the loop.
2.) assigns that object to the current position in the array
3.) Sets the width of a second object that has been instantiated outside the loop
4.) assigns that other object to the current position in the array
btw.: I bet you meant "assignLength.setLength(Double.parseDouble(in.readLine());" in line 3 ;)
Since each position in an array can only hold one value, the first assignment (line 2) is overwritten by the second assignment (line 4)
When I said "construct a new room-object and assign it to rooms[index]" I meant something like this:
for(index = 0; index < rooms.length; index++) {
    Room aNewRoom = new Room();
    aNewRoom.setWidth(Double.parseDouble(in.readLine()));
    aNewRoom.setLength(Double.parseDouble(in.readLine());
    rooms[index] = aNewRoom;
}1.) Constructs a new Object in every iteration of the for-loop. (btw: I don't know what kind of objects you're using, so this needs most likely modification!!)
2.) set the width of the newly created object
3.) set the length of the newly created object
4.) assign the newly created object to the current position in the array
-T-
btw. this would do the same:
for(index = 0; index < rooms.length; index++) {
    rooms[index] = new Room();
    rooms[index].setWidth(Double.parseDouble(in.readLine()));
    rooms[index].setLength(Double.parseDouble(in.readLine());
}but be sure you understand it. Your teacher most likely wants you to explain it ;)

Similar Messages

  • Formatted .data file, reading in and creating an array of objects from data

    Hi there, I have written a text file with the following format;
    List of random personal data: length 100
    1 : Atg : Age 27 : Income 70000
    2 : Dho : Age 57 : Income 110000
    3 : Lid : Age 40 : Income 460000
    4 : Wgeecnce : Age 43 : Income 370000
    and so on.
    These three pieces of data, Name,Age and Income were all generated randomly to be stored in an array of objects of class Person.
    Now what I must do is , read in this very file and re-create the array of objects that they were initially written from.
    I'm totally lost on how to go about doing this, I have only been learning java for the last month so anyone that can lend me a hand, that would be superb!
    Cheers!

    Looking at you other thread, you are able to create the code needed - so what's the problem?
    Here's an (not the only) approach:
    Create an array of the necessary length to hold the 3 variables, or, if you don't know the length of the file, create a class to contain the data. Then create an ArrayList to hold an instance of the class..
    Use the Scanner class to read and parse the file contents into the appropriate variables.
    Add each variable to either the array, or to an instance of the class and add that instance to the arraylist.

  • Creating new instances of objects from external classes

    Hello!
    I have a number of classes, in particular a 'room' class and a 'player' class. I've just made them as simple classes with a couple of fields and a few accessor and mutator methods.
    I have a 'start' class, and at the moment it has the heading:
    public class start extends room {  This is working fine, as I have been able to create an array of rooms and use the room object's roomName method for each room to name it. But now I also want to create a new player:
    player player1 = new player;But I don't know how to do that. I'm fairly new to Java and have been working from web tutorials and textbooks, but am still not quite used to the very 'universal' format of the code (i.e it just uses generic terms instead of actual examples of real-life situations).
    If someone can help me with a simple way of having both the room and player class available for new object creation I'd be most grateful. My compiler cannot seem to create the new player as there is no direct link to that class.
    Cheers.
    Hussein.
    "Simplicity is appreciated."

    You keep posting these basic questions and asking for simple answers. Well, learning Java is not a simple task. You need to start at the beginning of a long road and take many steps, one at a time. May I suggest one or more of the following:
    Sun's basic Java tutorial
    Sun's New To Java Center. Includes an overview of what Java is, instructions for setting up Java, an intro to programming (that includes links to the above tutorial or to parts of it), quizzes, a list of resources, and info on certification and courses.
    http://javaalmanac.com. A couple dozen code examples that supplement The Java Developers Almanac.
    jGuru. A general Java resource site. Includes FAQs, forums, courses, more.
    JavaRanch. To quote the tagline on their homepage: "a friendly place for Java greenhorns." FAQs, forums (moderated, I believe), sample code, all kinds of goodies for newbies. From what I've heard, they live up to the "friendly" claim.
    Bruce Eckel's Thinking in Java (Available online.)
    Joshua Bloch's Effective Java
    Bert Bates and Kathy Sierra's Head First Java.
    James Gosling's The Java Programming Language. Gosling is
    the creator of Java. It doesn't get much more authoratative than this.

  • Creating an array of objects of a class known ONLY at RUNTIME

    I have a method in a class which expects an array of objects of particular type (say A) as its only argument. I 'invoke' this method using reflection. I have the instances of the class A stored in a Vector. When I do 'toArray' on this vector, what I get back is an array of Objects and not an array of objects of A. I assign this array to the zeroth element of another Object array and pass that array as a second argument to the 'invoke' method. Of course, it throws an Exception saying - argument types mismatch. Because I am sending an array of Objects to a method expecting an array of objects of A. My problem is I don't know A until runtime. So I have to handle whatever I am getting back after doing 'toArray' on a vector as a Generic Object. I know there's another version of 'toArray' in the Vector class. But it's API documentation didn't help a lot.
    Can anybody please help me solve this problem? Any sort of hints/code snippet would be of great help.
    Does the above description makes any sense? If not, please let me know. I would try to illustrate it with a code sample.
    Thanks a lot in advance.

    Sorry, for the small typo. It is -
    clazz[] arr = (clazz [])java.lang.reflect.Array.newInstance(clazz, n);
    instead
    Thanks for the reply. I could do this. But I am
    getting a handle to the method to be 'invoke'd by
    looking at the types of the parameters its
    expecting(getParameterTypes). So I can't change it to
    accept an array of Generic Objects.
    I looked at the java.lang.reflect.Array class to do
    this. This is what I am trying to do-
    String variableName is an input coming into my
    program.
    n is the size of the array I'm trying to create.
    Class clazz = Class.forName(variableName);
    clazz[] arr = (clazz
    [])java.lang.reflect.newInstance(clazz, n);
    According to Reflection API, it should work, right?
    But compiler yells at me saying 'class clazz not
    found'.
    Any suggestions/hints/help?
    Thanks, again.

  • Accessing the same object from multiple classes.

    For the life of me I can't workout how I can access things from classes that haven't created them.
    I don't want to have to use "new" multiple times in seperate classes as that would erase manipulated values.
    I want to be able to access and manipulate an array of objects from multiple classes without resetting the array object values. How do I create a new object then be able to use it from all classes rather than re-creating it?
    Also I need my GUI to recognize the changes my buttons are making to data and reload itself so they show up.
    All help is good help!
    regards,
    Luke Grainger

    As long as you have a headquarters it shouldn't be to painfull. You simply keep a refrence to your ShipDataBase and Arsenal and all your irrellevant stuff in Headquarters. So the start of your Headquarters class would look something like:
    public class Headquarters{
      public Arsenal arsenal;
      public ShipDatabase db;
    //constructor
      public Headquarters(){
        arsenal = new Arsenal(this, ....);
        db = new ShipDatabase(...);
    //The Arsenal class:
    public class Arsenal{
      public Headquarter hq;
      public Arsenal(Headquarter hq, ....){
        this.hq = hq;
        .Then in your ShipDatabase you should, as good programing goes, keep the arraylist as a private class variable, and then make simple public methods to access it. Methods like getShipList(), addToShipList(Ship ship)....
    So when you want to add a ship from arsenal you write:
    hq.db.addToShipList(ship);
    .Or you could of course use a more direct refrence:
    ShipDatabase db = hq.db;
    or even
    ShipList = hq.db.getShipList();
    but this requires that the shiplist in the DB is kept public....
    Hope it was comprehensive enough, and that I answered what you where wondering.
    Sjur
    PS: Initialise the array is what you do right here:
    //constructor
    shipList = new Ship[6];
    shipList[0] = new Ship("Sentry", 15, 10, "Scout");
    " " " "etc
    shipList[5] = new Ship("Sentry", 15, 10, "Scout");PPS: To make code snippets etc. more readable please read this article:
    http://forum.java.sun.com/faq.jsp#messageformat

  • Why can't I create new object from a class that is in my big class?

    I mean:
    class A
    B x = new B;
    class B
    and how can I solve it if I still want to create an object from B class.
    Thank you very much :)

    public class ItWorksNow  {
      public ItWorksNow() {
      public static void main ( String[] argv )  throws Exception {
        ItWorksNow.DaInnaClass id = new ItWorksNow().new DaInnaClass();
      public class DaInnaClass {
    }

  • Can't create mcafee plug-in object: TypeError: Components.classes[cid] is undefined

    I updated to Firefox 4.0 and ever since then, I get this message when I try to open Firefox:
    can't create mcafee plug-in object: TypeError: Components.classes[cid] is undefined
    I have a Mac and have McAfee protection for Mac. This problem did not happen before I updated Firefox. Once I click on "OK" Firefox opens.

    This issue is most likely caused by a McAfee extension that isn't working properly and you will have to disable the extension that causes it.
    You can also check if there is an update available from McAfee that fixes this problem.

  • After downloading 4.0 I get this message: JavaScript application can't create mcafee plug-in object: TypeError: components.classes[cid] is undefined

    I finished downloading Firefox 4.o to my Mac OS.X.
    When I try to open a website I get the message:
    [JavaScript Application] can't create mcafee plug-in object: TypeError: Components.classes[cid] is undefined
    If I click the OK button, the site opens, but without the McAfee alert at the bottom of the window.
    I had just downloaded 3.6.16, and got box suggesting download version 4.0 for better security, but that seems to be where the problem is!

    That indicates that an add-on you are using is not compatible, considering the other errors it is possibly the McAfee add-on. To confirm what add-on is causing this use the procedure in this link - https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

  • The following error message came when I tried to open Firefox and install Firefox Home. "can't create mcafee plug-in object: TypeError: Components.classes[cid] is undefined"

    The following error message came when I tried to open Firefox and install Firefox Home.
    "can't create mcafee plug-in object: TypeError: Components.classes[cid] is undefined"

    This issue can be caused by an extension or plugin that isn't working properly.
    Start Firefox in [[Safe Mode]] to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
    * Don't make any changes on the Safe mode start window.
    See:
    * [[Troubleshooting extensions and themes]]
    * [[Troubleshooting plugins]]

  • Can i return an Array of Objects from c++ to java ??

    hello all,
    Can i return an Array of Objects from c++ to java ??
    If so how is it possible ??
    regards,
    gautam

    I suggest you look into the JNI, Java Native Interface. The answer is yes.

  • Reading an Array of Objects from a .bin file!

    Hey, at the moment I'm creating a program whereby I write a set of objects onto a bin file, in this case an array of objects with a String name/county, and int population/area.... I'm not trying to read it back from the bin file and encountering trouble! I've managed to get it working using plain objects, however I want to be able to read in arrays of objects. The file itself compiles, however during running I get this error
    java.lang.NullPointerException
    at RecordFiles.CoastalRead.main(CoastalRead.java:33)
    at RecordFiles.__SHELL16.run(__SHELL16.java:6)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at bluej.runtime.ExecServer$3.run(ExecServer.java:774)
    Here is the program itself,
    import java.io.*;
    public class CoastalRead {
        public static void main(String[] args) {
            CoastalTowns towns[] = new CoastalTowns[50];
              towns[0] = new CoastalTowns();
              towns[1] = new CoastalTowns();
              towns[2] = new CoastalTowns();
              towns[3] = new CoastalTowns();
              towns[4] = new CoastalTowns();
              String name, county;
              int population, area;
            try {
                FileInputStream fileIn =
                        new FileInputStream("CoastalTownsBin.bin");
                ObjectInputStream in = new ObjectInputStream(fileIn);
                for (int i = 0; i < towns.length; i++){
                 towns[i] =(CoastalTowns) in.readObject();
                   System.out.println("Deserialized File...");
                       System.out.println("Name: " + towns.name);
              System.out.println("County: " + towns[i].county);
         System.out.println("Population: " + towns[i].population);
              System.out.println("Area: " + towns[i].area);
    in.close();
    fileIn.close();
    } catch (IOException i) {}
    catch (ClassNotFoundException c) {}
    +I'd appreciate a fast reply!+ And if someone needs the writing class I've used, I can post it asap.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

    CoastalTowns towns[] = new CoastalTowns[50];
    towns[0] = new CoastalTowns();
    towns[1] = new CoastalTowns();
    towns[2] = new CoastalTowns();
    towns[3] = new CoastalTowns();
    towns[4] = new CoastalTowns();Why create an array with a size of 50 and then only fill 5 elements?
    Why bother filling any elements at all when you are reading the objects from a file?
    What happens if there are less than 50 objects in your file?
    I will assume CoastalTowns holds info about a single town, so why is it pluralised? Do you have a class called Dog or Dogs, Chair or Chairs, Person or People?
    } catch (IOException i) {}
    catch (ClassNotFoundException c) {}DO NOT swallow exceptions. At the very least put in a call to printStackTrace so you know if/when an exception occurs.
    I'd appreciate a fast reply!I typed as fast as I could but unfortunately I'm still and hunt and peck guy.

  • Oracle ADF Mobile getting array of objects from webservice

    hi,
    i am trying to fetch a certain number of records using a webservice call and then storing in the SQLLite DB in the mobile.
    i understand i can create a data control using the webservice > then?
    my webservice returns an array of objects.
    how can i do that?
    regards,
    ad

    It's fairly easy.
    What I have done is created a WebService Controller (plain java class) which calls the methods (from the WS) programmaticly.
    Example :
    public class WSController {
        private final String WSDataControllerName = "ThisIsTheNameOfMyWebserviceDataControl";
        private List pnames ,ptypes ,params;
        public WSController() {
            super();
        public List getAllActioncodesFromWS()
           //start - WS empty params
            pnames = new ArrayList();
            params = new ArrayList();
            ptypes = new ArrayList();
            pnames.add("findCriteria");
            params.add(null);
            ptypes.add(Object.class);
            pnames.add("findControl");
            params.add(null);
            ptypes.add(Object.class);
            //end - WS empty params
            List actionCodes = new ArrayList();
            try
                GenericType result = (GenericType)AdfmfJavaUtilities.invokeDataControlMethod(WSDataControllerName, null, "findActioncodesView1",pnames, params, ptypes);
                if(result!=null)
                    for (int i = 0; i < result.getAttributeCount(); i++)
                        GenericType row = (GenericType)result.getAttribute(i);
                        Actioncode wd = (Actioncode)GenericTypeBeanSerializationHelper.fromGenericType(Actioncode.class, row);
                        actionCodes.add(wd);
            catch (AdfInvocationException e)
                e.getMessage();
            catch (Exception e)
                e.getMessage();
         return actionCodes;
        }I also defined a Pojo named Actioncode :
    Note that the attribute names are completly the same as the VO from the web service.
    public class Actioncode {
        String Actioncode,Descript1;
        public Actioncode() {
            super();
        public Actioncode(String Actioncode, String Descript1) {
            super();
            this.Actioncode = Actioncode;
            this.Descript1 = Descript1;
        public void setActioncode(String Actioncode) {
            this.Actioncode = Actioncode;
        public String getActioncode() {
            return Actioncode;
        public void setDescript1(String Descript1) {
            this.Descript1 = Descript1;
        public String getDescript1() {
            return Descript1;
    }Since the WS method returns a GenericType, you can 'convert' that object to an POJO.
    Read more about it here :
    http://adf4beginners.blogspot.be/2013/01/adf-mobile-how-to-iterate-over-all-rows.html
    I know the blog post is about iterating over rows in an iterator, but it's just to illustrate how you can work with the GenericType

  • Extracting Array of objects from web service

    After a couple days of head banging I now have a webservice
    call executing and I am trying to extract / create a class from the
    ResultEvent:
    If the xml returned from the web service is:
    <people>
    <person name="Mike" />
    <person name="Dave" />
    </people>
    and the class is:
    class Person
    public var Name:String;
    The result event is:
    private function doResults(result:ResultEvent):void
    // how do I create an array of Person objects from result, I
    would also like to know how to create a typed array something like
    class PersonList if possible. I just need the raw how to loop the
    result and set the values on the class
    Thanks,
    Mike

    Well I wound up with just trial and error until I got it
    working, Im sure this will be improved as I go, but it's enough to
    press on with the app for now, this code is in the result function
    and result is the ResultEvent wich appears to be an array of
    generic objects representing the objects returned by the service.
    This in no way uses FDS and is talking to a simple dotnet / asp.net
    web service.
    // here app is a singleton class for app level data it is
    bindable and is used to update the view which in this example is
    bound to a public var MyObjects which in this case is an
    ArrayCollection, I unbox to MyObject in a custom view control
    for (var s:String in result.result)
    m = new MyObject();
    m.ID = result.result[s].ID;
    m.Name = result.result[s].Name;
    m.Type = result.result[s].Type;
    app.MyObjects.addItem(m);
    It also appears that you should create the WebService one
    time, and store refrences to the methods during app startup, the
    methods are called Operations and it appears you set the result and
    fault events then call send on the operation to get the data.
    // store this in a singleton app class
    var ws:WebService = new WebService();
    ws.wsdl = "
    http://dev.domain.com/WebService.asmx?WSDL";
    ws.addEventListener("result",doResults);
    ws.addEventListener("fault",doFault);
    ws.loadWSDL();
    // this is the operation which is also stored in the
    singleton app class
    var op:AbstractOperation = ws.getOperation("GetModules");
    // elsewere in the app we get the operation refrence setup
    result and fault and call send, then copy the generic object into
    our cutom classes using the first chunk of code above
    op.addEventListener("result",doResults);
    op.addEventListener("fault",doFault);
    op.send();
    I thought I would post this as I could find no such example
    in the offline or online docs, If anyone has a better way or see's
    a problem please post.
    I hope helps others with non FDS service calls and I look
    forward to hearing comments.
    Thanks,
    Mike

  • How do i use objects from one class in anohter?

    Hey
    I have two GUI classes ShowWhiteGUI and BasketGUI and then a control class ShowWhite. The control class calls all the method from anohter class's which the GUI classes are gonna use.
    The basis idea with this script is it shall be a very very simpel Shop. Where you can add items to a basket and then show the items in a new window(BasketGUI).
    So here is the problem. I cant create an object in both GUI classes, because then im working with two sets of data, right? So how do i do this?
    Here is my code:
    ShowWhiteGUI
    * ShowWhiteGUI.java
    * Created on 5. februar 2008, 10:43
    package userclasses;
    import javax.swing.*;
    import java.awt.*;
    import java.awt.event.*;
    * @author  Lille mus
    public class ShowWhiteGUI extends javax.swing.JFrame {
        private BasketGUI basketGUI;
        private ShowWhite control;
        /** Creates new form ShowWhiteGUI */
        public ShowWhiteGUI() {
            basketGUI = new BasketGUI();
            control = new ShowWhite();
            initComponents();
        /** This method is called from within the constructor to
         * initialize the form.
         * WARNING: Do NOT modify this code. The content of this method is
         * always regenerated by the Form Editor.
        // <editor-fold defaultstate="collapsed" desc="Generated Code">                         
        private void initComponents() {
            aboutDialog = new javax.swing.JDialog();
            jLabel1 = new javax.swing.JLabel();
            jScrollPane1 = new javax.swing.JScrollPane();
            jTextArea1 = new javax.swing.JTextArea();
            itemIdField = new javax.swing.JTextField();
            productIdLabel = new javax.swing.JLabel();
            numberOfItems = new javax.swing.JLabel();
            productId = new javax.swing.JTextField();
            basketButton = new javax.swing.JButton();
            jLabel2 = new javax.swing.JLabel();
            showBasketButton = new javax.swing.JButton();
            jMenuBar1 = new javax.swing.JMenuBar();
            menu = new javax.swing.JMenu();
            jMenu1 = new javax.swing.JMenu();
            open = new javax.swing.JMenuItem();
            quit = new javax.swing.JMenuItem();
            jMenuItem1 = new javax.swing.JMenuItem();
            jMenu2 = new javax.swing.JMenu();
            help = new javax.swing.JMenuItem();
            about = new javax.swing.JMenuItem();
            javax.swing.GroupLayout aboutDialogLayout = new javax.swing.GroupLayout(aboutDialog.getContentPane());
            aboutDialog.getContentPane().setLayout(aboutDialogLayout);
            aboutDialogLayout.setHorizontalGroup(
                aboutDialogLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGap(0, 400, Short.MAX_VALUE)
            aboutDialogLayout.setVerticalGroup(
                aboutDialogLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGap(0, 300, Short.MAX_VALUE)
            setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
            setTitle("Show White's Shop");
            setBackground(new java.awt.Color(0, 102, 255));
            jLabel1.setFont(new java.awt.Font("Baby Kruffy", 0, 36));
            jLabel1.setText("Snow White?s Shop");
            jTextArea1.setColumns(20);
            jTextArea1.setEditable(false);
            jTextArea1.setRows(5);
            jTextArea1.setText(control.getPrintAllStockItems());
            jScrollPane1.setViewportView(jTextArea1);
            productIdLabel.setText("Varenummer:");
            numberOfItems.setText("Antal:");
            basketButton.setText("L?g i kurv");
            basketButton.addActionListener(new java.awt.event.ActionListener() {
                public void actionPerformed(java.awt.event.ActionEvent evt) {
                    putInBasket(evt);
            showBasketButton.setText("Vis indk?bskurv");
            showBasketButton.addActionListener(new java.awt.event.ActionListener() {
                public void actionPerformed(java.awt.event.ActionEvent evt) {
                    showBasket(evt);
            menu.setLabel("Fil");
            jMenu1.setText("Menu");
            menu.add(jMenu1);
            open.setLabel("?bn");
            open.addActionListener(new java.awt.event.ActionListener() {
                public void actionPerformed(java.awt.event.ActionEvent evt) {
                    open(evt);
            menu.add(open);
            quit.setLabel("Luk");
            quit.addActionListener(new java.awt.event.ActionListener() {
                public void actionPerformed(java.awt.event.ActionEvent evt) {
                    quit(evt);
            menu.add(quit);
            jMenuItem1.setLabel("Gem");
            jMenuItem1.addActionListener(new java.awt.event.ActionListener() {
                public void actionPerformed(java.awt.event.ActionEvent evt) {
                    save(evt);
            menu.add(jMenuItem1);
            jMenuBar1.add(menu);
            jMenu2.setLabel("Hj?lp");
            help.setLabel("Hj?lp");
            help.addActionListener(new java.awt.event.ActionListener() {
                public void actionPerformed(java.awt.event.ActionEvent evt) {
                    help(evt);
            jMenu2.add(help);
            about.setLabel("Om Show White Shop");
            jMenu2.add(about);
            jMenuBar1.add(jMenu2);
            setJMenuBar(jMenuBar1);
            javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
            getContentPane().setLayout(layout);
            layout.setHorizontalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGroup(layout.createSequentialGroup()
                            .addGap(37, 37, 37)
                            .addComponent(jLabel1))
                        .addGroup(layout.createSequentialGroup()
                            .addContainerGap()
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                                .addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
                                    .addComponent(productIdLabel)
                                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                    .addComponent(itemIdField, javax.swing.GroupLayout.PREFERRED_SIZE, 37, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                    .addComponent(numberOfItems))
                                .addComponent(jScrollPane1, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.PREFERRED_SIZE, 184, javax.swing.GroupLayout.PREFERRED_SIZE))
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addGroup(layout.createSequentialGroup()
                                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                        .addComponent(productId, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE)
                                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 65, Short.MAX_VALUE)
                                        .addComponent(basketButton))
                                    .addGroup(layout.createSequentialGroup()
                                        .addGap(31, 31, 31)
                                        .addComponent(jLabel2)))
                                .addGroup(layout.createSequentialGroup()
                                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                    .addComponent(showBasketButton)))))
                    .addContainerGap())
            layout.setVerticalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addComponent(jLabel1)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                        .addGroup(layout.createSequentialGroup()
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 179, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addComponent(jLabel2))
                            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 49, Short.MAX_VALUE)
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                .addComponent(productIdLabel)
                                .addComponent(itemIdField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addComponent(numberOfItems)
                                .addComponent(productId, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                        .addGroup(layout.createSequentialGroup()
                            .addComponent(showBasketButton)
                            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 202, Short.MAX_VALUE)
                            .addComponent(basketButton)))
                    .addContainerGap())
            pack();
        }// </editor-fold>                       
        public void createBasketWindow(){
            basketGUI.setVisible(true);
        private void showBasket(java.awt.event.ActionEvent evt) {                           
            createBasketWindow();
        private void putInBasket(java.awt.event.ActionEvent evt) {                            
            Integer itemId = Integer.parseInt(itemIdField.getText());
            String petToAdd = control.getFindItem(itemId);
            System.out.println(petToAdd);
            control.setAddItemToBasket(itemId);
            basketGUI.addPetToBasket(petToAdd);     
        private void help(java.awt.event.ActionEvent evt) {                     
        private void save(java.awt.event.ActionEvent evt) {                     
            System.out.println("Gemmer fil");
        private void open(java.awt.event.ActionEvent evt) {                     
            System.out.println("?bn fil");
        private void quit(java.awt.event.ActionEvent evt) {                     
            System.exit(0);
        public ShowWhite getControl(){
            return control;
         * @param args the command line arguments
        public static void main(String args[]) {
            java.awt.EventQueue.invokeLater(new Runnable() {
                public void run() {
                    new ShowWhiteGUI().setVisible(true);
        // Variables declaration - do not modify                    
        private javax.swing.JMenuItem about;
        private javax.swing.JDialog aboutDialog;
        private javax.swing.JButton basketButton;
        private javax.swing.JMenuItem help;
        private javax.swing.JTextField itemIdField;
        private javax.swing.JLabel jLabel1;
        private javax.swing.JLabel jLabel2;
        private javax.swing.JMenu jMenu1;
        private javax.swing.JMenu jMenu2;
        private javax.swing.JMenuBar jMenuBar1;
        private javax.swing.JMenuItem jMenuItem1;
        private javax.swing.JScrollPane jScrollPane1;
        private javax.swing.JTextArea jTextArea1;
        private javax.swing.JMenu menu;
        private javax.swing.JLabel numberOfItems;
        private javax.swing.JMenuItem open;
        private javax.swing.JTextField productId;
        private javax.swing.JLabel productIdLabel;
        private javax.swing.JMenuItem quit;
        private javax.swing.JButton showBasketButton;
        // End of variables declaration                  
    }BasketGUI:
    * Basket.java
    * Created on 5. februar 2008, 15:29
    package userclasses;
    import javax.swing.JTextArea;
    * @author  Lille mus
    public class BasketGUI extends javax.swing.JFrame {
        private String newline = "\n";
        private InvoiceGUI invoiceGUI;
        /** Creates new form Basket */
        public BasketGUI() {       
            initComponents();
            //invoiceGUI = new InvoiceGUI();
        public void addPetToBasket(String pet){
            jTextArea1.append(pet+newline);
        /** This method is called from within the constructor to
         * initialize the form.
         * WARNING: Do NOT modify this code. The content of this method is
         * always regenerated by the Form Editor.
        // <editor-fold defaultstate="collapsed" desc="Generated Code">                         
        private void initComponents() {
            jLabel1 = new javax.swing.JLabel();
            jScrollPane1 = new javax.swing.JScrollPane();
            jTextArea1 = new javax.swing.JTextArea();
            jButton1 = new javax.swing.JButton();
            itemIdField = new javax.swing.JTextField();
            jLabel2 = new javax.swing.JLabel();
            removeItemButton = new javax.swing.JButton();
            setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
            setTitle("Indk?bskurv");
            jLabel1.setText("Indk?bskurv");
            jTextArea1.setColumns(20);
            jTextArea1.setRows(5);
            jScrollPane1.setViewportView(jTextArea1);
            jButton1.setText("K?b og print kvittering");
            jButton1.addActionListener(new java.awt.event.ActionListener() {
                public void actionPerformed(java.awt.event.ActionEvent evt) {
                    printInvoice(evt);
            jLabel2.setText("Slet varenr");
            removeItemButton.setText("Slet");
            removeItemButton.addActionListener(new java.awt.event.ActionListener() {
                public void actionPerformed(java.awt.event.ActionEvent evt) {
                    removeItemFromBasket(evt);
            javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
            getContentPane().setLayout(layout);
            layout.setHorizontalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGroup(layout.createSequentialGroup()
                            .addGap(21, 21, 21)
                            .addComponent(jLabel1))
                        .addGroup(layout.createSequentialGroup()
                            .addContainerGap()
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                .addGroup(layout.createSequentialGroup()
                                    .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 141, Short.MAX_VALUE)
                                    .addComponent(jButton1))
                                .addGroup(layout.createSequentialGroup()
                                    .addComponent(jLabel2)
                                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                    .addComponent(itemIdField, javax.swing.GroupLayout.PREFERRED_SIZE, 24, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                    .addComponent(removeItemButton)))))
                    .addContainerGap())
            layout.setVerticalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addContainerGap()
                    .addComponent(jLabel1)
                    .addGap(20, 20, 20)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(jButton1)
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 125, Short.MAX_VALUE)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                        .addComponent(jLabel2)
                        .addComponent(itemIdField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addComponent(removeItemButton))
                    .addContainerGap())
            pack();
        }// </editor-fold>                       
        private void removeItemFromBasket(java.awt.event.ActionEvent evt) {                                     
            Integer itemId = Integer.parseInt(itemIdField.getText());
        private void printInvoice(java.awt.event.ActionEvent evt) {                             
            //invoiceGUI.setVisible(true);
        public JTextArea getTextArea(){
            return jTextArea1;
         * @param args the command line arguments
        public static void main(String args[]) {
            java.awt.EventQueue.invokeLater(new Runnable() {
                public void run() {
                    new BasketGUI().setVisible(true);
        // Variables declaration - do not modify                    
        private javax.swing.JTextField itemIdField;
        private javax.swing.JButton jButton1;
        private javax.swing.JLabel jLabel1;
        private javax.swing.JLabel jLabel2;
        private javax.swing.JScrollPane jScrollPane1;
        private javax.swing.JTextArea jTextArea1;
        private javax.swing.JButton removeItemButton;
        // End of variables declaration                  
    }ShowWhite:
    * ShowWhite.java
    * Created on 13. februar 2008, 18:15
    * To change this template, choose Tools | Template Manager
    * and open the template in the editor.
    package userclasses;
    * @author Lille mus
    public class ShowWhite {
        public Basket basket;
        public Stock stock;
        /** Creates a new instance of ShowWhite */
        public ShowWhite() {
            stock = new Stock();
            basket = new Basket();
        public String getFindItem(int itemId){
            String returnItem = stock.findItem(itemId);
            return returnItem;
        public void setAddItemToBasket(int itemId){
            basket.addItemToBasket(itemId);
        public String getPrintAllStockItems(){
            return stock.printAllStockItems();
        public String getShowBasket(){
             return basket.showBasket();
        public void setRemoveItemFromBasket(int itemId){
            basket.removeItemFromBasket(itemId);
    }

    okay i tried this, but it give me a nullpointerexeption:
    Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
    at userclasses.ShowWhiteGUI.initComponents(ShowWhiteGUI.java:75)
    at userclasses.ShowWhiteGUI.<init>(ShowWhiteGUI.java:21)
    at userclasses.ShowWhite.<init>(ShowWhite.java:26)
    at userclasses.Main.<init>(Main.java:16)
    at userclasses.Main$1.run(Main.java:31)
    ShowWhite
    public class ShowWhite {
        public Basket basket;
        public Stock stock;
        private ShowWhiteGUI mainGUI;
        private BasketGUI basketGUI;
        /** Creates a new instance of ShowWhite */
        public ShowWhite() {
            stock = new Stock();
            basket = new Basket();
            mainGUI = new ShowWhiteGUI(this);
            basketGUI = new BasketGUI();
        public String getFindItem(int itemId){
            String returnItem = stock.findItem(itemId);
            return returnItem;
        public void setAddItemToBasket(int itemId){
            basket.addItemToBasket(itemId);
        public String getPrintAllStockItems(){
            return stock.printAllStockItems();
        public String getShowBasket(){
             return basket.showBasket();
        public void setRemoveItemFromBasket(int itemId){
            basket.removeItemFromBasket(itemId);
        public void createMainGUI(){
            mainGUI.setVisible(true);
        public BasketGUI getBasketGUI(){
            return basketGUI;
        public void setAddPetToBasket(String pet){
            basketGUI.addPetToBasket(pet);
    }ShowWhiteGUI:
    public class ShowWhiteGUI extends javax.swing.JFrame {
        private ShowWhite control;
        /** Creates new form ShowWhiteGUI */
        public ShowWhiteGUI(ShowWhite control) {
            initComponents();
            this.control = control;
        /** This method is called from within the constructor to
         * initialize the form.
         * WARNING: Do NOT modify this code. The content of this method is
         * always regenerated by the Form Editor.
        // <editor-fold defaultstate="collapsed" desc="Generated Code">                         
        private void initComponents() {
            aboutDialog = new javax.swing.JDialog();
            jLabel1 = new javax.swing.JLabel();
            jScrollPane1 = new javax.swing.JScrollPane();
            jTextArea1 = new javax.swing.JTextArea();
            itemIdField = new javax.swing.JTextField();
            productIdLabel = new javax.swing.JLabel();
            numberOfItems = new javax.swing.JLabel();
            productId = new javax.swing.JTextField();
            basketButton = new javax.swing.JButton();
            jLabel2 = new javax.swing.JLabel();
            showBasketButton = new javax.swing.JButton();
            jMenuBar1 = new javax.swing.JMenuBar();
            menu = new javax.swing.JMenu();
            jMenu1 = new javax.swing.JMenu();
            open = new javax.swing.JMenuItem();
            quit = new javax.swing.JMenuItem();
            jMenuItem1 = new javax.swing.JMenuItem();
            jMenu2 = new javax.swing.JMenu();
            help = new javax.swing.JMenuItem();
            about = new javax.swing.JMenuItem();
            javax.swing.GroupLayout aboutDialogLayout = new javax.swing.GroupLayout(aboutDialog.getContentPane());
            aboutDialog.getContentPane().setLayout(aboutDialogLayout);
            aboutDialogLayout.setHorizontalGroup(
                aboutDialogLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGap(0, 400, Short.MAX_VALUE)
            aboutDialogLayout.setVerticalGroup(
                aboutDialogLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGap(0, 300, Short.MAX_VALUE)
            setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
            setTitle("Show White's Shop");
            setBackground(new java.awt.Color(0, 102, 255));
            jLabel1.setFont(new java.awt.Font("Baby Kruffy", 0, 36));
            jLabel1.setText("Snow White?s Shop");
            jTextArea1.setColumns(20);
            jTextArea1.setEditable(false);
            jTextArea1.setRows(5);
            jTextArea1.setText(control.getPrintAllStockItems());
            jScrollPane1.setViewportView(jTextArea1);
            productIdLabel.setText("Varenummer:");
            numberOfItems.setText("Antal:");
            basketButton.setText("L?g i kurv");
            basketButton.addActionListener(new java.awt.event.ActionListener() {
                public void actionPerformed(java.awt.event.ActionEvent evt) {
                    putInBasket(evt);
            showBasketButton.setText("Vis indk?bskurv");
            showBasketButton.addActionListener(new java.awt.event.ActionListener() {
                public void actionPerformed(java.awt.event.ActionEvent evt) {
                    showBasket(evt);
            menu.setLabel("Fil");
            jMenu1.setText("Menu");
            menu.add(jMenu1);
            open.setLabel("?bn");
            open.addActionListener(new java.awt.event.ActionListener() {
                public void actionPerformed(java.awt.event.ActionEvent evt) {
                    open(evt);
            menu.add(open);
            quit.setLabel("Luk");
            quit.addActionListener(new java.awt.event.ActionListener() {
                public void actionPerformed(java.awt.event.ActionEvent evt) {
                    quit(evt);
            menu.add(quit);
            jMenuItem1.setLabel("Gem");
            jMenuItem1.addActionListener(new java.awt.event.ActionListener() {
                public void actionPerformed(java.awt.event.ActionEvent evt) {
                    save(evt);
            menu.add(jMenuItem1);
            jMenuBar1.add(menu);
            jMenu2.setLabel("Hj?lp");
            help.setLabel("Hj?lp");
            help.addActionListener(new java.awt.event.ActionListener() {
                public void actionPerformed(java.awt.event.ActionEvent evt) {
                    help(evt);
            jMenu2.add(help);
            about.setLabel("Om Show White Shop");
            jMenu2.add(about);
            jMenuBar1.add(jMenu2);
            setJMenuBar(jMenuBar1);
            javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
            getContentPane().setLayout(layout);
            layout.setHorizontalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGroup(layout.createSequentialGroup()
                            .addGap(37, 37, 37)
                            .addComponent(jLabel1))
                        .addGroup(layout.createSequentialGroup()
                            .addContainerGap()
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                                .addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
                                    .addComponent(productIdLabel)
                                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                    .addComponent(itemIdField, javax.swing.GroupLayout.PREFERRED_SIZE, 37, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                    .addComponent(numberOfItems))
                                .addComponent(jScrollPane1, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.PREFERRED_SIZE, 184, javax.swing.GroupLayout.PREFERRED_SIZE))
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addGroup(layout.createSequentialGroup()
                                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                        .addComponent(productId, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE)
                                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 65, Short.MAX_VALUE)
                                        .addComponent(basketButton))
                                    .addGroup(layout.createSequentialGroup()
                                        .addGap(31, 31, 31)
                                        .addComponent(jLabel2)))
                                .addGroup(layout.createSequentialGroup()
                                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                    .addComponent(showBasketButton)))))
                    .addContainerGap())
            layout.setVerticalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addComponent(jLabel1)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                        .addGroup(layout.createSequentialGroup()
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 179, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addComponent(jLabel2))
                            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 49, Short.MAX_VALUE)
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                .addComponent(productIdLabel)
                                .addComponent(itemIdField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addComponent(numberOfItems)
                                .addComponent(productId, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                        .addGroup(layout.createSequentialGroup()
                            .addComponent(showBasketButton)
                            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 202, Short.MAX_VALUE)
                            .addComponent(basketButton)))
                    .addContainerGap())
            pack();
        }// </editor-fold>                       
        public void createBasketWindow(){
            control.getBasketGUI().setVisible(true);
        private void showBasket(java.awt.event.ActionEvent evt) {                           
            createBasketWindow();
        private void putInBasket(java.awt.event.ActionEvent evt) {                            
            Integer itemId = Integer.parseInt(itemIdField.getText());
            String petToAdd = control.getFindItem(itemId);
            System.out.println(petToAdd);
            control.setAddItemToBasket(itemId);
            control.setAddPetToBasket(petToAdd);     
        private void help(java.awt.event.ActionEvent evt) {                     
        private void save(java.awt.event.ActionEvent evt) {                     
            System.out.println("Gemmer fil");
        private void open(java.awt.event.ActionEvent evt) {                     
            System.out.println("?bn fil");
        private void quit(java.awt.event.ActionEvent evt) {                     
            System.exit(0);
        public ShowWhite getControl(){
            return control;
        // Variables declaration - do not modify                    
        private javax.swing.JMenuItem about;
        private javax.swing.JDialog aboutDialog;
        private javax.swing.JButton basketButton;
        private javax.swing.JMenuItem help;
        private javax.swing.JTextField itemIdField;
        private javax.swing.JLabel jLabel1;
        private javax.swing.JLabel jLabel2;
        private javax.swing.JMenu jMenu1;
        private javax.swing.JMenu jMenu2;
        private javax.swing.JMenuBar jMenuBar1;
        private javax.swing.JMenuItem jMenuItem1;
        private javax.swing.JScrollPane jScrollPane1;
        private javax.swing.JTextArea jTextArea1;
        private javax.swing.JMenu menu;
        private javax.swing.JLabel numberOfItems;
        private javax.swing.JMenuItem open;
        private javax.swing.JTextField productId;
        private javax.swing.JLabel productIdLabel;
        private javax.swing.JMenuItem quit;
        private javax.swing.JButton showBasketButton;
        // End of variables declaration                  
    }

  • How to pass arraylist of object from action class to jsp and display in jsp

    I need to do the following using struts
    I have input jsp, action class and action form associated to that. In the action class I will generate the sql based on the input from jsp page/action form, create a result set. The result set is stored as java objects in a ArrayList object.
    Now I need to pass the arraylist object to another jsp to display. Can I put the ArrayList object in the request object and pass to the success page defined for the action? If this approach is not apprpriate, please let me know correct approach.
    if this method is okay, how can I access the objects from arraylist in jsp and display their property in jsp. This java object is a java bean ( getter and setter methods on it).
    ( need jsp code)
    Can I do like this:
    <% ArrayList objList = (ArrayList)request.getattribute("lookupdata"): %> in jsp
    (***I have done request.setattribute("lookupdata", arraylistobj); in action class. ***)
    Assuming the java object has two properties, can I do the following
    <% for (iint i=0. i<objList.size;I++){ %>
    <td> what should i do here to get the first property of the object </td>
    <td> what should i do here to get the first property of the object </td>
    <% }
    %>
    if this approach is not proper, how can I pass the list of objects and parse in jsp?
    I am not sure what will be the name of the object. I can find out how many are there but i am not sure I can find out the name
    thanks a lot

    Double post:
    http://forum.java.sun.com/thread.jspa?threadID=5233144&tstart=0

Maybe you are looking for

  • Reader 9.2 - "can not be used to view PDF files in a web browser"

    Hello, I recently deployed Adobe 9.2 within our organization. I used the Adobe Customization Wizard 9 to transform the install set, and selected the "Display PDF in Browser" option as default. When opening a PDF linked from a web URL, we get the mess

  • FileVault 2 failure - more than one admin account

    New rMBP 15" with 10.8.2, used Migration Assistant from a 10.6.8 boot.  Very happy with it, and have been using it for a few days. Decided to enable filevault 2 to encrypt my boot drive.  I enabled it, rebooted, and then went back to the Security & P

  • Having trouble with left align in all versions of internet explorer

    I created my pages in Dreamweaver and uploaded them to my university's server.  Because we have a content management system and my boss didn't like the layout that we are able to use, I had to create separate html pages and place them into the CMS us

  • Serving video files with PC's

    Using OS X Server, I would like to set up a video file network at work. We have nine GRaid external hard drives and six PC laptops running AVID. Is it possible to get a Mac Mini running OS X server that would control the external hard drives through

  • Java applet using the Swing API

    write a Java applet using the Swing API to manage a PC repair shop. When a PC is brought in for repair, a member of staff will use this applet to log it into the system as a repair job. They will also be able to use the applet to manage the job e.g.


HashFlare