Develop Reference

JPanel and JMenuBar to the same frame

I can't seem to add both a JMenuBar and a JPanel to my frame?
How come?
Code:
package proj;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class Proj extends JFrame implements ActionListener {
Proj() {
setSize(400,300);
setResizable(false);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setLayout(new FlowLayout());
setVisible(true);
JMenuBar rodMenu = new JMenuBar();
JMenu menu = new JMenu("Vis");
JMenuItem men_item1 = new JMenuItem("Statestik");
JPanel wrapper = new JPanel();
wrapper.setPreferredSize(new Dimension(380, 240));
wrapper.setBorder(BorderFactory.createLineBorder(Color.black));
setJMenuBar(rodMenu);
rodMenu.add(menu);
menu.add(men_item1);
add(wrapper);
}
public static void main(String[] args) {
new Proj();
}
}
With this code, the panel isn't added, only the menu... If I remove the menu, then the panel appears.

What do you mean panel not appearing? I could see both menu and panel with this code!
If the problem still persist try moving the setSize(), setResizable() etc block down like
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
public class Proj extends JFrame implements ActionListener {
Proj() {
JMenuBar rodMenu = new JMenuBar();
JMenu menu = new JMenu("Vis");
JMenuItem men_item1 = new JMenuItem("Statestik");
JPanel wrapper = new JPanel();
wrapper.setPreferredSize(new Dimension(380, 240));
wrapper.setBorder(BorderFactory.createLineBorder(Color.black));
setJMenuBar(rodMenu);
rodMenu.add(menu);
menu.add(men_item1);
JButton b = new JButton("Test");
wrapper.add(b);
add(wrapper);
setSize(400, 300);
setResizable(false);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setLayout(new FlowLayout());
setVisible(true);
}
public static void main(String[] args) {
new Proj();
}
#Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
}
}

Try adding with
this.getContentPane.add(wrapper)
instead of
add(wrapper)

Setting a background image in JTabbedPane

I want to set a background image in a simple JTabbedPane. I used a Jlabel to set my background image. But i haven't been able to do so as i get a null pointer exception upon running.
Can anyone help with some more ideas?
Here is my code:
import javax.swing.ImageIcon;
import javax.swing.JTabbedPane;
import javax.swing.JTextField;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.UIManager;
import javax.swing.UIManager.LookAndFeelInfo;
import java.awt.*;
import java.awt.event.*;
class ImageTest
{
JTabbedPane tp;
JLabel lab1
JPanel welcome;
JFrame frame;
ImageIcon image2;
public void createUI()
{
frame=new JFrame("JTabbedPane");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
welcome= new JPanel(null);
welcome.setPreferredSize(new Dimension(1366,786));
image2 = new ImageIcon("icloud.jpg");
tp=new JTabbedPane();
Container pane = frame.getContentPane();
pane.add(tp);
tp.addTab("Welcome", welcome);
lab1.setIcon(image2);
lab1.setBounds(0,0,1500,700);
frame.setSize(500,500);
frame.setVisible(true);
frame.setTitle("I-Cloud");
}
public static void main(String[] args)
{
try {
for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (Exception e) {
}
ImageTest tbp = new ImageTest ();
tbp.createUI();
}
}
EDIT:
import javax.swing.ImageIcon;
import javax.swing.JTabbedPane;
import javax.swing.JTextField;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.UIManager.LookAndFeelInfo;
import java.awt.*;
import java.awt.event.*;
class ImageTest
{
JTabbedPane tp;
JLabel lab1;
JPanel welcome,w;
JFrame frame;
ImageIcon image2;
JButton b1;
public void createUI()
{
frame=new JFrame("JTabbedPane Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
b1=new JButton();
welcome= new JPanel(new GridLayout(1,1,15,15));
w=new JPanel (new GridLayout(1, 1, 15, 15));
welcome.setPreferredSize(new Dimension(1366,786));
ImageIcon icon = new ImageIcon(ImageTest.class.getResource("icloud.jpg"));
tp=new JTabbedPane();
Container pane = frame.getContentPane();
pane.add(tp);
lab1=new JLabel();
lab1.setIcon(icon);
w.setOpaque(false);
w.add(b1);
b1.setVisible(true);
welcome.add(lab1);
welcome.add(w);
tp.addTab("Welcome", welcome);
frame.setSize(500,500);
frame.pack();
frame.setVisible(true);
frame.setTitle("I-Cloud");
}
public static void main(String[] args)
{
try {
for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (Exception e) {
}
ImageTest w = new ImageTest();
w.createUI();
}
}

You may just want to paint the image onto the panel you use for the JTabbedPane (as seen below). But as MadProgammer pointed out. It's most likely you are getting a null from the file location of your image file.
Note: when passing a String to the ImageIcon you are telling it to look for image in the file system. though this may work in a development environment from your IDE, it will not work at time of deployment Instead of reading the image file from the file system, you want to load it from the class path, as should be don with embedded resources, using a URL, which can be obtained by using MyClass.class.getResource(path)
So the way you should loading your image is like this
ImageIcon icon = new ImageIcon(ImageTest.class.getResource("icloud.jpg"));
And your image file would be in the same package as ImageIcon.java. You don't have to put the image in the same package, as you can specify a different path. You can find more info from the embedded resource tag wiki link above.
But back to the option of painting the background, see the example below. Instead of using a URL web link for the image though, you would read in your image file path as specified above.
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class TabBackground {
private BufferedImage bg;
public TabBackground() {
try {
bg = ImageIO.read(new URL("http://2.bp.blogspot.com/-wWANHD-Dr00/TtSmeY57ZXI/AAAAAAAABB8/t-fpXmQZ0-Y/s1600/Vector_by_Karpiu23.png"));
} catch (IOException ex) {
Logger.getLogger(TabBackground.class.getName()).log(Level.SEVERE, null, ex);
}
JPanel tabPanel = new JPanel(new GridBagLayout()) {
#Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawImage(bg, 0, 0, getWidth(), getHeight(), this);
}
#Override
public Dimension getPreferredSize() {
return new Dimension(400, 300);
}
};
JPanel buttons = new JPanel(new GridLayout(4, 1, 15, 15));
buttons.setOpaque(false);
for (int i = 0; i < 4; i++) {
buttons.add(new JButton("Button"));
}
tabPanel.add(buttons);
JTabbedPane tabPane = new JTabbedPane();
tabPane.add("Panel with Bachground", tabPanel);
JFrame frame = new JFrame("Tabbed Pane with Background");
frame.setContentPane(tabPane);
frame.pack();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
Logger.getLogger(TabBackground.class.getName()).log(Level.SEVERE, null, ex);
}
new TabBackground();
}
});
}
}

You can add an image like this on Jframe:
tp.addTab("Welcome",new JLabel(new ImageIcon("bksqla_xlargecover.jpg")));

Refreshing Gui on solo thread

iam coding one app and i want to draw some marks and pictures over the map.But here i have the problem.When i push button iam starting the thread with 30 miliseconds delay.But in fact it looks like this task is running on main thread cause the gui stop refreshing and cant do anything with it.
Heres my code
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Line2D;
import javax.swing.JInternalFrame;
import javax.swing.JPanel;
public class MapDrawer extends JPanel
{
Graphics testGrafika;
DrawerThread drawingThread;
public MapDrawer(JPanel drawPanel)
{
drawPanel.add(this);
testGrafika=drawPanel.getGraphics();
paintComponent(testGrafika);
drawingThread=new DrawerThread();
drawingThread.run();
}
#Override
public void paintComponent(Graphics g)
{
super.paintComponents(g);
this.setBackground(Color.WHITE);
g.setColor(Color.BLUE);
g.fillRect(10, 25, 200, 200);
}
public Graphics getGraphics()
{
return testGrafika;
}
public class DrawerThread extends Thread implements Runnable
{
#Override
public void run()
{
while(true)
{
repaint();
try {
DrawerThread.sleep(30);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
And this is my GUI class:
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import java.awt.BorderLayout;
import javax.swing.JButton;
import java.awt.CardLayout;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.LayoutStyle.ComponentPlacement;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.Insets;
import java.awt.FlowLayout;
import javax.swing.border.EtchedBorder;
import javax.swing.JToolBar;
import javax.swing.SwingConstants;
import org.eclipse.wb.swing.FocusTraversalOnArray;
import soft.MapDrawer;
import soft.MapView;
import java.awt.Component;
import javax.swing.JToggleButton;
import javax.swing.JRadioButton;
import javax.swing.JInternalFrame;
import java.awt.Canvas;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.Dimension;
import javax.swing.JLayeredPane;
public class MainWindow {
private JFrame frame;
private JMenu MenuBasicActions;
private JInternalFrame mapFrameRef;
private JPanel drawPanelRef;
/**
* Launch the application.
*/
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
try
{
MainWindow window = new MainWindow();
window.frame.setVisible(true);
} catch (Exception e)
{
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public MainWindow()
{
initialize();
}
public JFrame getMainFrame()
{
return frame;
}
public JPanel getDrawPanel()
{
return drawPanelRef;
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frame = new JFrame();
frame.setVisible(true);
frame.setBounds(100, 100, 1024, 768);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JMenuBar menuBarUpper = new JMenuBar();
frame.setJMenuBar(menuBarUpper);
MenuBasicActions = new JMenu("GPS Settings");
menuBarUpper.add(MenuBasicActions);
JMenuItem mntmNewMenuItem = new JMenuItem("New menu item");
MenuBasicActions.add(mntmNewMenuItem);
JMenuItem mntmNewMenuItem_1 = new JMenuItem("New menu item");
MenuBasicActions.add(mntmNewMenuItem_1);
JMenuItem mntmNewMenuItem_2 = new JMenuItem("New menu item");
MenuBasicActions.add(mntmNewMenuItem_2);
JMenu DevicesMenu = new JMenu("Devices");
menuBarUpper.add(DevicesMenu);
JMenuItem mntmNewMenuItem_3 = new JMenuItem("New menu item");
DevicesMenu.add(mntmNewMenuItem_3);
JMenuItem mntmNewMenuItem_4 = new JMenuItem("New menu item");
DevicesMenu.add(mntmNewMenuItem_4);
JMenu HelpMenu = new JMenu("Help");
menuBarUpper.add(HelpMenu);
JToolBar toolBar = new JToolBar();
toolBar.setOrientation(SwingConstants.VERTICAL);
frame.getContentPane().add(toolBar, BorderLayout.WEST);
JButton btnNewButton_1 = new JButton("New button");
btnNewButton_1.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent arg0)
{
paint();
}
});
toolBar.add(btnNewButton_1);
JButton btnNewButton = new JButton("New button");
toolBar.add(btnNewButton);
JButton btnNewButton_2 = new JButton("New button");
toolBar.add(btnNewButton_2);
JButton btnNewButton_3 = new JButton("New button");
toolBar.add(btnNewButton_3);
toolBar.setFocusTraversalPolicy(new FocusTraversalOnArray(new Component[]{btnNewButton_1, btnNewButton}));
JInternalFrame mapFrame = new JInternalFrame("Military Tracking System");
mapFrame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
frame.getContentPane().add(mapFrame, BorderLayout.CENTER);
mapFrame.setVisible(true);
JPanel drawPanel = new JPanel();
drawPanel.setOpaque(false);
mapFrame.setGlassPane(drawPanel);
drawPanel.setVisible(true);
drawPanel.setBorder(null);
//mapFrame.getContentPane().add(drawPanel, BorderLayout.CENTER);
frame.setFocusTraversalPolicy(new FocusTraversalOnArray(new Component[]{frame.getContentPane(), toolBar, btnNewButton_1, btnNewButton, btnNewButton_2, btnNewButton_3, menuBarUpper, MenuBasicActions, mntmNewMenuItem, mntmNewMenuItem_1, mntmNewMenuItem_2, DevicesMenu, mntmNewMenuItem_3, mntmNewMenuItem_4, HelpMenu}));
MapView hlavnaMapa=new MapView();
hlavnaMapa.Init(mapFrame);
mapFrameRef=mapFrame;
drawPanelRef=drawPanel;
}
public void paint()
{
MapDrawer drawer=new MapDrawer(drawPanelRef);
//drawer.paintComponent(drawer.getGraphics());
}
}
What i want to do is running gui on one thread and draw objects on other,so i can control gui.

In order to start the Thread you should invoke drawingThread.start(); instead of run().
start() will then start a new thread and call the method run() inside this thread. If you instead call run() it will run on the same thread as the caller.

Modal JFrame on top of full screened JFrame

package javaapplication1;
import java.awt.Color;
import java.awt.DisplayMode;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class JavaApplication1 {
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
final JFrame frame = new JFrame();
final NewJPanel p = new NewJPanel();
frame.setTitle("Frame");
frame.setSize(300, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final GraphicsDevice device = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
device.setFullScreenWindow(frame);
device.setDisplayMode(new DisplayMode(800, 600, 32, 60));
JButton btn = new JButton();
btn.setText("Button");
JPanel panel = new JPanel();
panel.add(btn);
frame.add(panel);
btn.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
JFrame f = new JFrame();
JPanel p = new JPanel();
f.setSize(300, 300);
p.setBackground(Color.red);
f.add(p);
f.setLocationRelativeTo(null);
f.setAlwaysOnTop(true);
f.setVisible(true);
}
});
}
}
I wanted the f.setVisible(true); pops out inside the full screened JFrame which is set to be modal when I clicked the button. How can I do that? Because in that code, when I click the button, the f.setVisible(true); shows outside the full screen JFrame. Looking forward for your answers.

So you want something like JInternalFrame inside of your main JFrame:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.DisplayMode;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class JavaApplication1 {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
final JFrame frame = new JFrame();
final JDesktopPane desktopPane = new JDesktopPane();
frame.setTitle("Frame");
frame.setSize(300, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final GraphicsDevice device = GraphicsEnvironment
.getLocalGraphicsEnvironment().getDefaultScreenDevice();
device.setFullScreenWindow(frame);
device.setDisplayMode(new DisplayMode(800, 600, 32, 60));
JButton btn = new JButton();
btn.setText("Button");
JPanel panel = new JPanel();
panel.add(btn);
frame.add(panel, BorderLayout.NORTH);
frame.add(desktopPane, BorderLayout.CENTER);
btn.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
JInternalFrame f = new JInternalFrame();
JPanel p = new JPanel();
p.setBackground(Color.red);
f.setSize(300, 300);
f.setResizable(true);
f.add(p);
f.setVisible(true);
desktopPane.add(f);
}
});
}
});
}
}
More about JInternalFrame you can find here

Inserting Images into a JTextPane Error

I asked about this before, but, I decided to start a new thread with a SCCE, it compiles sucessfully but it doesn't insert the image. Can anyone troubleshoot as to why it does this? Thanks, Chris.
Here is the full code:
package mathnotesplus;
import java.awt.Dimension;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.SwingUtilities;
import javax.swing.JPanel;
import javax.swing.JTextPane;
import javax.swing.JFrame;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.event.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.text.*;
/**
*
* #author ChrisCates
*/
public class MathNotesPlus extends JFrame implements TreeSelectionListener {
/**
* #param args the command line arguments
*/
public MathNotesPlus() {
setTitle("Math Notes Plus");
setSize(800, 600);
initUI();
}
JPanel panel;
JTextPane textpane;
JTree navigation;
StyledDocument document;
public void initUI(){
//The panel.
panel = new JPanel();
//Textpane and JTree
textpane = new JTextPane();
navigation = new JTree();
navigation.addTreeSelectionListener(this);
//Preferred Resolution Size
navigation.setPreferredSize(new Dimension(100, 600));
textpane.setPreferredSize(new Dimension(700, 600));
//Insertion of image into the document.
try {
document = (StyledDocument)textpane.getDocument();
Style style = document.addStyle("StyleName", null);
StyleConstants.setIcon(style, new ImageIcon("sigma.png"));
document.insertString(document.getLength(), "ignored text", style);
} catch (BadLocationException e){
System.err.println("ERROR");
}
//Putting everything into the program.
panel.add(navigation);
panel.add(textpane);
add(panel);
pack();
}
public static void main(String[] args) {
// TODO code application logic here
SwingUtilities.invokeLater(new Runnable() {
public void run() {
MathNotesPlus app = new MathNotesPlus();
app.setVisible(true);
}
});
}
#Override
public void valueChanged(TreeSelectionEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
}

Base on this working example (a very close variant of your code) that works, I can only guess that your code is failing because the image is not being found.
import java.awt.Dimension;
import java.awt.Image;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.event.*;
import javax.swing.text.*;
import java.net.URL;
import javax.imageio.ImageIO;
public class MathNotesPlus extends JFrame {
JPanel panel;
JTextPane textpane;
StyledDocument document;
public MathNotesPlus() {
setTitle("Math Notes Plus");
setSize(800, 600);
initUI();
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
}
public void initUI(){
//The panel.
panel = new JPanel();
//Textpane
textpane = new JTextPane();
textpane.setPreferredSize(new Dimension(700, 600));
//Insertion of image into the document.
try {
Image image = ImageIO.read(new URL(
"http://pscode.org/media/stromlo1.jpg"));
document = (StyledDocument)textpane.getDocument();
Style style = document.addStyle("StyleName", null);
StyleConstants.setIcon(style, new ImageIcon(image));
document.insertString(document.getLength(), "ignored text", style);
} catch (Exception e){
e.printStackTrace();
}
//Putting everything into the program.
panel.add(textpane);
add(panel);
pack();
}
public static void main(String[] args) {
// TODO code application logic here
SwingUtilities.invokeLater(new Runnable() {
public void run() {
MathNotesPlus app = new MathNotesPlus();
app.setVisible(true);
}
});
}
}