The container uses a BorderLayout. I have a JPanel that I added to the CENTER. However the JPanel doesn't have a variable name for it. I could do contents.remove(nameofPanel) But since I added it like this contents.add(new CustomJPanel(), BorderLayout.CENTER); Now I'm trying to remove the current CustomJPanel and add a new one. How d...
What would be the most appropriate image type to display a jpg image (loaded from a local folder) on a JPanel? Cheers. ...
Hi Everyone, Riddle me this: I have a JTabbedPane that has custom JPanels in it. When I try and access those JPanels, all I get back is null. I know that the panels have been added because on the UI I can see the tabs. I can also interact with the panels and switch between tabs. It doesn't matter how I add these JPanels, it always return...
I need to draw a graph over a JPanel by overriding the JPanel's paintComponent() method. While designing gui using netbeans when i drag/drop a JPanel over JFrame it generates code by creating a private variable, JPanel object. In such a case how can i override its method to draw over it... or else if i write code for a class by exten...
Is there a way to convert a JPanel (that has not yet been displayed) to a BufferedImage? thanks, Jeff ...
How to make a JPanel scrollable? I implemented the scrollable interface yet when adding it to the containing panel with tabbedPane.add("Editor", new JScrollPane(storeyEditor = new MNScrollablePanel())); nothing works Code: public class MNScrollablePanel extends JPanel implements Scrollable { public Dimension getPreferredScroll...
Hi all, Well the title is quite self explanatory. I want to build two panels one on-top of each other in layers using java. I want the top layer to contain a JPanel which will contain a graphics2d object. I'd like both the JPanel and graphics2d to have transparent background (I still want the content drawn by the graphics2d visible). Do...
Hi all, I am struggling ( ! ) with java GUI development. All these small things that make obvious sense just don't work. I'll explain what I am trying to do and where I am failing (this is quite frustrating): I've got this graphics2d object which resides inside a panel. Now this graphics draws an image, it can go on and draw forever. t...
Hi everyone, I'm having some trouble designing an MDI Application with Swing. I have no trouble implementing the JDesktopPane & JInternalFrames, my question will be a little more specific. Here is my base container Frame in a glance: package applicationGUI; import javax.swing.JFrame; public class DesktopContainer extends JFrame{ /* F...
I'm changing a program from AWT to Swing, as proposed on the second chapter of Java Swing's book, and the panel just disappears when I do the change from Panel to JPanel. The same doesn't happen when I change from Button to JButton. It seems to be a bug, since it appears to be trivially simple to do so - just adding an extra J to the na...
I have a JFrame with a JPanel on it. I want to add another JPanel which is a preconfigured component onto the Jpanel inside my JFrame. If I do this: subPanel.setLayout(new BorderLayout()); subPanel.add(preconfiguredPanel,BorderLayout.CENTER); my Panel will show. If I do this: subPanel.add(preconfiguredPanel); my JPan...
JPanel pMeasure = new JPanel(); .... JLabel economy = new JLabel("Economy"); JLabel regularity = new JLabel("Regularity"); pMeasure.add(economy); pMeasure.add(regularity); ... When I run the code above I get this output: Economy Regularity How can I get this output, where each JLabel starts on a new line? Thanks Economy Regular...
I have problem displaying drawing on JPanel. I created three class which linked to each other as the following. I was wondering why this code, doesn't display my drawing. c.add(pDraw); pDraw.add(draw); 1) MAIN public class mainPage { public static void main(String[]args){ JFrame appFrame = new Frame(); appFrame.setVis...
I'm having a problem adding a JPanel on top of an Image. This is what I'm trying to do: Image bgImage = loadImage(filename); JPanel jp = new JPanel(); jp.setBounds(100,100,100,100); jp.setOpaque(true); jp.setBackgroudColor(Color.red); bgImage.add(jp); After doing this, I only see the bgImage. I tried everything but I still can't sho...
My program have 3 classes. 1) main, 2) frame, 3) drawingBoard. The logic of my program is that, a new drawing will be displayed every times user click on New pattern button (and this working fine). 1st class - main method public class mainPage { public static void main(String[]args){ JFrame appFrame = new Frame(); appFra...
I set the JPanel background color as white. However when I save it into JPG or other image format, the background are all in black. I have put this code TYPE_INT_ARGB but it doesnt work. How can I set the background to other color? e.g. blue, white etc. public void paintComponent(Graphics g) { int width = getWidth(); i...
Hello there. I am writing a simple application in Java that does some particle simulation on a bunch of sheep (don't ask). For this I want a window with a JPanel for graphics (which will be resizable with a simple combobox that contains some standard resolutions) and some other elements like buttons to start and pause the simulation etc....
I'm creating a form with a JPanel inside it for some graphics and some buttons for controlling the thing. For some reason I have to specify the JPanel to be 10 px less wide and 30 px less high than the actual graphics I want to put inside it. What causes this problem? This is the code: public class Window { public Sheepness sheepness;...
How can I display jpg image which I stored in arraylist in JPanel? Im not able to display the jpg files in the JPanel. String[] pictureFile = {"A.jpg","B.jpg","C.jpg"}; List<String> picList1 = Arrays.asList(pictureFile); Collections.shuffle(picList1); ImageIcon icon = new ImageIcon("picList1.get(0)"); JLabel label1 = new JLabel(...
Hello, I cannot get my JPanel within my JApplet to receive keyboard events. I CANNOT FATHOM why! Note that... Clicking the panel (with mouse) before typing makes no difference. This is by far the most common advice I see given on the Net. I have tried using the 'low-level' java.awt.KeyEventDispatcher interface. That makes no differen...