Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException

> Because the code is fairly large would it be ok if i

> zipped up my project so that whoever is willing to

> help me can run it themselves and see what the

> problem might be?

>

No. Isolate the problem on your own to a section of code. Then post that code using the code formatting tags.

If this is unacceptable to you then you should consider hiring someone.

cotton.ma at 2007-7-12 11:44:35 >

> Exception in thread "AWT-EventQueue-0"

> java.lang.NullPointerException

> at

> CollingwoodDatabase.ImageJPanel.<init>(ImageJPanel.jav

> a:34)

> at

> CollingwoodDatabase.PlayerListApp.initComponents(Playe

> rListApp.java:170)

> at

> CollingwoodDatabase.PlayerListApp.<init>(PlayerListApp

> .java:40)

> at

> CollingwoodDatabase.PlayerListApp$1.run(PlayerListApp.

> java:29)

> at

> java.awt.event.InvocationEvent.dispatch(InvocationEven

> t.java:209)

> at

> java.awt.EventQueue.dispatchEvent(EventQueue.java:597)

>

> at

> java.awt.EventDispatchThread.pumpOneEventForFilters(Ev

> entDispatchThread.java:273)

> at

> java.awt.EventDispatchThread.pumpEventsForFilter(Event

> DispatchThread.java:183)

> at

> java.awt.EventDispatchThread.pumpEventsForHierarchy(Ev

> entDispatchThread.java:173)

> at

> java.awt.EventDispatchThread.pumpEvents(EventDispatchT

> hread.java:168)

> at

> java.awt.EventDispatchThread.pumpEvents(EventDispatchT

> hread.java:160)

> at

> java.awt.EventDispatchThread.run(EventDispatchThread.j

> ava:121)

>

>

> Problem is it errors in a few different classes.

Not surprising since it occurs in a constructor for a class which you may well be using in a few different places.

You should post the constructor for PlayerListApp and the code for the initComponents method of that class as well.

cotton.ma at 2007-7-12 11:44:35 >

Constructor

public PlayerListApp() {

currentFileName = "empty.dat";

setPlayerList();

initComponents();

setMenuItemStates(DataStatus.NODATABASE);

}

InitComponents (Prepare yourself....NOT SHORT...lol)

private void initComponents() {

buttonGroup = new javax.swing.ButtonGroup();

jFileChooser1 = new JFileChooser(System.getProperty("user.dir"));

mainPanel = new javax.swing.JPanel();

bottomPanel = new javax.swing.JPanel();

leftBottomPanelInsert = new javax.swing.JPanel();

messageLabel = new javax.swing.JLabel();

messageField = new javax.swing.JTextField();

rightBottomPanelInsert = new javax.swing.JPanel();

detailButton = new javax.swing.JRadioButton();

imageButton = new javax.swing.JRadioButton();

jLabel1 = new javax.swing.JLabel();

viewPanel = new ImageJPanel(playerListPanel1);

imageJPanel1 = new CollingwoodDatabase.ImageJPanel();

playerListPanel1 = new PlayerListPanel(this);

jMenuBar1 = new javax.swing.JMenuBar();

fileMenu = new javax.swing.JMenu();

miOpen = new javax.swing.JMenuItem();

miSave = new javax.swing.JMenuItem();

miSaveAs = new javax.swing.JMenuItem();

miQuit = new javax.swing.JMenuItem();

playerMenu = new javax.swing.JMenu();

miAdd = new javax.swing.JMenuItem();

miAmmend = new javax.swing.JMenuItem();

miRemove = new javax.swing.JMenuItem();

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

leftBottomPanelInsert.setBorder(javax.swing.BorderFactory.createEtchedBorder());

messageLabel.setText("Status");

javax.swing.GroupLayout leftBottomPanelInsertLayout = new javax.swing.GroupLayout(leftBottomPanelInsert);

leftBottomPanelInsert.setLayout(leftBottomPanelInsertLayout);

leftBottomPanelInsertLayout.setHorizontalGroup(

leftBottomPanelInsertLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(leftBottomPanelInsertLayout.createSequentialGroup()

.addGap(19, 19, 19)

.addComponent(messageLabel)

.addGap(23, 23, 23)

.addComponent(messageField, javax.swing.GroupLayout.DEFAULT_SIZE, 160, Short.MAX_VALUE)

.addContainerGap())

);

leftBottomPanelInsertLayout.setVerticalGroup(

leftBottomPanelInsertLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(leftBottomPanelInsertLayout.createSequentialGroup()

.addContainerGap()

.addGroup(leftBottomPanelInsertLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)

.addComponent(messageLabel)

.addComponent(messageField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))

.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))

);

rightBottomPanelInsert.setBorder(javax.swing.BorderFactory.createEtchedBorder());

buttonGroup.add(detailButton);

detailButton.setText("Details");

detailButton.setBorder(javax.swing.BorderFactory.createEmptyBorder(0, 0, 0, 0));

detailButton.setMargin(new java.awt.Insets(0, 0, 0, 0));

detailButton.addItemListener(new java.awt.event.ItemListener() {

public void itemStateChanged(java.awt.event.ItemEvent evt) {

detailButtonItemStateChanged(evt);

}

});

buttonGroup.add(imageButton);

imageButton.setText("Image");

imageButton.setBorder(javax.swing.BorderFactory.createEmptyBorder(0, 0, 0, 0));

imageButton.setMargin(new java.awt.Insets(0, 0, 0, 0));

imageButton.addItemListener(new java.awt.event.ItemListener() {

public void itemStateChanged(java.awt.event.ItemEvent evt) {

imageButtonItemStateChanged(evt);

}

});

javax.swing.GroupLayout rightBottomPanelInsertLayout = new javax.swing.GroupLayout(rightBottomPanelInsert);

rightBottomPanelInsert.setLayout(rightBottomPanelInsertLayout);

rightBottomPanelInsertLayout.setHorizontalGroup(

rightBottomPanelInsertLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(rightBottomPanelInsertLayout.createSequentialGroup()

.addContainerGap()

.addComponent(detailButton)

.addGap(27, 27, 27)

.addComponent(imageButton)

.addContainerGap(29, Short.MAX_VALUE))

);

rightBottomPanelInsertLayout.setVerticalGroup(

rightBottomPanelInsertLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, rightBottomPanelInsertLayout.createSequentialGroup()

.addContainerGap(20, Short.MAX_VALUE)

.addGroup(rightBottomPanelInsertLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)

.addComponent(detailButton)

.addComponent(imageButton))

.addContainerGap())

);

javax.swing.GroupLayout bottomPanelLayout = new javax.swing.GroupLayout(bottomPanel);

bottomPanel.setLayout(bottomPanelLayout);

bottomPanelLayout.setHorizontalGroup(

bottomPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(bottomPanelLayout.createSequentialGroup()

.addContainerGap()

.addComponent(leftBottomPanelInsert, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 29, Short.MAX_VALUE)

.addComponent(rightBottomPanelInsert, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)

.addContainerGap())

);

bottomPanelLayout.setVerticalGroup(

bottomPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, bottomPanelLayout.createSequentialGroup()

.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)

.addGroup(bottomPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)

.addComponent(rightBottomPanelInsert, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)

.addComponent(leftBottomPanelInsert, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))

.addContainerGap())

);

jLabel1.setIcon(new javax.swing.ImageIcon("C:\\Users\\Wicksy\\Documents\\SCHOOL\\YEAR 3-1\\OOP\\Assignment1\\CollingwoodDatabase\\src\\CollingwoodDatabase\\heading.gif"));

viewPanel.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));

javax.swing.GroupLayout imageJPanel1Layout = new javax.swing.GroupLayout(imageJPanel1);

imageJPanel1.setLayout(imageJPanel1Layout);

imageJPanel1Layout.setHorizontalGroup(

imageJPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGap(0, 229, Short.MAX_VALUE)

);

imageJPanel1Layout.setVerticalGroup(

imageJPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGap(0, 298, Short.MAX_VALUE)

);

javax.swing.GroupLayout viewPanelLayout = new javax.swing.GroupLayout(viewPanel);

viewPanel.setLayout(viewPanelLayout);

viewPanelLayout.setHorizontalGroup(

viewPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addComponent(imageJPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)

);

viewPanelLayout.setVerticalGroup(

viewPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addComponent(imageJPanel1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)

);

javax.swing.GroupLayout mainPanelLayout = new javax.swing.GroupLayout(mainPanel);

mainPanel.setLayout(mainPanelLayout);

mainPanelLayout.setHorizontalGroup(

mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(mainPanelLayout.createSequentialGroup()

.addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)

.addComponent(bottomPanel, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)

.addGroup(javax.swing.GroupLayout.Alignment.LEADING, mainPanelLayout.createSequentialGroup()

.addGap(33, 33, 33)

.addComponent(playerListPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)

.addGap(18, 18, 18)

.addComponent(viewPanel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))

.addGroup(javax.swing.GroupLayout.Alignment.LEADING, mainPanelLayout.createSequentialGroup()

.addGap(51, 51, 51)

.addComponent(jLabel1)))

.addContainerGap(20, Short.MAX_VALUE))

);

mainPanelLayout.setVerticalGroup(

mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(mainPanelLayout.createSequentialGroup()

.addContainerGap()

.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 108, javax.swing.GroupLayout.PREFERRED_SIZE)

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)

.addComponent(playerListPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)

.addComponent(viewPanel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))

.addGap(25, 25, 25)

.addComponent(bottomPanel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)

.addContainerGap(39, Short.MAX_VALUE))

);

fileMenu.setText("File");

miOpen.setText("Open");

miOpen.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

miOpenActionPerformed(evt);

}

});

fileMenu.add(miOpen);

miSave.setText("Save");

miSave.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

miSaveActionPerformed(evt);

}

});

fileMenu.add(miSave);

miSaveAs.setText("Save As");

miSaveAs.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

miSaveAsActionPerformed(evt);

}

});

fileMenu.add(miSaveAs);

miQuit.setText("Quit");

miQuit.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

miQuitActionPerformed(evt);

}

});

fileMenu.add(miQuit);

jMenuBar1.add(fileMenu);

playerMenu.setText("Players");

miAdd.setText("Add");

miAdd.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

miAddActionPerformed(evt);

}

});

playerMenu.add(miAdd);

miAmmend.setText("Ammend");

miAmmend.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

miAmmendActionPerformed(evt);

}

});

playerMenu.add(miAmmend);

miRemove.setText("Remove");

miRemove.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

miRemoveActionPerformed(evt);

}

});

playerMenu.add(miRemove);

jMenuBar1.add(playerMenu);

setJMenuBar(jMenuBar1);

javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());

getContentPane().setLayout(layout);

layout.setHorizontalGroup(

layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addComponent(mainPanel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)

);

layout.setVerticalGroup(

layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addComponent(mainPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)

);

pack();

}

wicksya at 2007-7-12 11:44:35 >

Second reason to get rid of IDEs.

viewPanel = new ImageJPanel(playerListPanel1);

[...]

playerListPanel1 = new PlayerListPanel(this);

Maybe you should initialize the playerListPanel1 before you use it.

CeciNEstPasUnProgrammeura at 2007-7-12 11:44:35 >

> Oh wait i think i have initialised it with this code

> in the initComponents

It's not a lack of initialization, but the wrong sequence. 1) Your hands are empty. 2) Then you throw the pebble. 3) Then you pick up a pebble from the ground.

Doesn't work. First, pick it up, then throw it.

CeciNEstPasUnProgrammeura at 2007-7-21 21:26:33 >