Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at javax.swing.ImageIcon.<init>(Unknown Source)
at com.ui.ChatFrame.<init>(ChatFrame.java:44)
at com.ui.ChatFrame$6.run(ChatFrame.java:412)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
I've tried to add a background image to my calculator , however I have ended up with this ...Calculator.jpg
How do I fix it so the image is behind my buttons etc (as a background) And how do I fix my textarea so it is back to the normal size and not the height of the image? My code is below, please be specific.
import javax.swing.*; import java.awt.*; import java.awt.event.*; /** * Program using SWING components to create a Christmas themed Calculator. */
public class GridBag1 extends JFrame implements ActionListener { private JFrame window= new JFrame("Christmas Calculator");
This is my code and it works! But how/where do I set a background image for it to appear as the background of my calculator? The code I have for it is this -
import javax.swing.*; import java.awt.*; import java.awt.event.*; /** * Program using SWING components to create a Christmas themed Calculator. */ public class ChristmasCalculator implements ActionListener
I've been trying to post background picture for a long time in java. I've just finished writing breakout game and I want it to be more special and full of interesting things. I want to upload picture in java. I write
GImage image= new GImage("LEONARDO.JPG"); image.setSize(50,50) add(image,200,400)
I have tried to set a background Image to a calculator usinf JLabel. However I've ended up with my image to the left of my calculator , my calculator textfield becoming the size of the background image and then all my buttons below it. Like so(if you can view the image)..Calculator.jpg
How can I fix this so the background is behind my buttons and my text area is a normal size again.
Actually i want to develop a game for that i need a background with a image and over this background i want to move some objects (which are images) and also want to add some button.
Here is my Code.
The Main Class
package last; import java.awt.*; import javax.swing.*; public class Last extends JFrame{ public static void main(String[] args) { Last l =new Last(); l.setSize(900, 600);
[Code] .....
When i execute the above program only the background image is shown.
I would like to learn how to add an image background to a window in java that I can put controls like buttons, textboxes, and checkboxes in front of. I already tried using a JLabel with an ImageIcon but I cannot overlay controls over the JLabel. From what I understand there are multiple ways to do this. What is the best way and how can I do it?
I am trying to set a picture in the background of my GUI. I had already made the GUI with the all the required buttons and labels. So I was trying to separately make a class which extends JPanel and add a picture to a panel by overriding the paintComponent() method, and then added it to a frame (I did not set the default layout of the frame, so it was the default...), and it worked very fine. Here is the code:
Then I needed to add this panel with background picture to the background frame of my already made frame with all the buttons on it.The layout of the parent frame of my GUI was BorderLayout(50, 50), panels (with buttons) were added to it n the north and south positions.
Then I tried to add a JPanel with the background image to the parent frame (of my GUI), (I wanted it to elapse the entire frame, and come under all the buttons and controls, which were only present in the north and south positions of the border layout), and then the panels holding the buttons to the north and south postions of this panel, everything disappeared.
If I don't do anything except adding this panel with the background image to the parent frame, it only takes up the place not taken up by the two panels on the frame (Border Layout)
how to add this panel to the parent frame of my GUI such that it elapses the entire parent frame's background, and the panels containing the buttons should sit on it.
IMPORTANT PARTS OF CODE:- Java Code: //TOP LEFT PANEL JPanel topleftpanel = new JPanel(new FlowLayout(FlowLayout.LEFT, 5, 5)); parentPanel_top.add(topleftpanel); topleftpanel.setOpaque(false);
I've tried multiple things but I can't seem to figure out how to get my JButton over the background graphics. On lines 104-108 I create the JButton I need to put on the screen, though I have no clue how to draw it. How I can paint over this background and have my button stay there?
public static final int WIDTH = 1024; public static final int HEIGHT = 640; private Thread thread; private boolean running; private BufferedImage image; private Graphics2D g;
I'm making a pong game but I would like to use a basketball court image behind my code to give it a prettier look (the ball is also a basketball), but I can't seem to get my code to appear on top of my basketball court image, the image just overlaps my code.
In my program one of the panel has a background image and I need that background image to be updated/refresh or changed whenever the panel reaches certain number of clicks
here's the code
Constructor/gui import java.awt.*; import javax.swing.*; import javax.swing.text.*;; public class demo { JFrame frame = new JFrame ("Idle Game Test!"); JPanel backGroundPanel = new JPanel ();
[code].....
also is there other way to access those static variables? the way i implemented them works but i do think there are other ways that are more suitable or better but i cant figure out.
How can i add a background image for this code without disappearing the button and label? I want a frame that has a background and still shows the buttons and label that I place. and how can I insert Buffered Reader in this code, this is a file organizer, but it only shows first line of a text file. I want to show the whole text file. And is it possible to also show path of the file?
I am unable to clear disappear the background of .png image added in a translucent JPanel. I have tried it using JLabel but the image added is with white background. How can i get rid of this white background...
import javax.swing.*; import java.util.*; import java.awt.*; public class HomePage { JFrame frame; JPanel pnl1, pnl2, pnl3; JLabel lbl;
The serializable class ImagePanel does not declare a static final serialVersionUID field of type long public class ImagePanel extends JPanel{ ^^^^^^^ ^ ^^2 problems (1 error, 1 warning) mh_sh_highlight_all('java');
im basically just trying to put the image inside the GUI and centre the text underneath it. Which is hard to believe since the text is above the image in the code .
I've got a problem with my applet when I run it in a browser (firefox mainly but nothing else is working neither). First of all, the program is "unsigned" according to firefox security system, but I don't think that's where to problem lies. When I start the applet (as an html application) it says:
AccessControlException
Then it says: Access denied ("java.io.FilePermission" "bla, bla, bla (img source on my harddrive)" "read")
How do I get this to work? This is the picture I'm trying to implement: [URL]...
Can we cance/stop a long running database query execution instantly so that we can do any another task.
As i know swing uses a single thread i,e Event Dispatch Thread (EDT), But at the same time we can use Swingworker class for better use of UI. When we use Swingworker class the process goes to a different thread and our basic UI is not Frozen. Infact we can do another task. But what I want is I want to stop of cancel the execution of swingworker thread ( Because I that thread takes long time to execute). How can I do that??
I used ProgressMonitor and in the cancel option i canceled the task ( worker.cancel(true) also i closed the connection and statement for executing the database query using stmt.close() and conn.close() methods.
But it does not work. How to cancel a long running database background process in a Java Swing Program.
So I am trying to add a logo to my existing program. However nothing shows up when I run it. I am getting no errors and everything else seems to be fine. This is just the logo part if you need the whole code it will be separate (just trying to make things easier.
class Logo extends JPanel { public Logo() { super(); setPreferredSize(new Dimension(200,200)); } public void paint(Graphics g) { g.setColor(Color.red); g.fillRoundRect(60,60,110,90,5,5); g.setColor(Color.black); g.drawString("DEAD BUG", 70, 105);
I'm writing a Java Swing program for my software development class to allow a user to create a map for a side scroller video game. I'm stuck on a particular part of my GUI where I'm trying to create a properties box for specific tiles. When I draw the components onto the JPanel and display it as it is, it shows two check boxes per row. On the ScrollPane however, all the check boxes go straight onto one line and draw out the scroll pane. Right now I am only concerned with just making the basic GUI.
Here is what I have so far:
Within the main class, I am creating the JFrame and adding components to it. I am attempting to create a JScrollPane which will hold the properties check boxes...
Here is the method where I am implementing the code. It works, but it doesn't display correctly.
private void createPropertiesBox() { PropertiesBoxPanel pbp = new PropertiesBoxPanel(); propertiesBox = new JScrollPane(pbp); propertiesBox.setViewportView(pbp); frame.add(propertiesBox);
[Code] .....
I've been tinkering with this code for quite some time now and I cannot seem to make a breakthrough on how to fix this.
I've added a small program that reads from a .txt file to the windows 8 startup folder using a .bat file ... The problem I have Is I've used relative paths for text files In the program and It doesn't work unless I change them to absolute paths.
The .bat file Is basically java -cp[absolute path to program directory] ReadAFileApp . Is there something (most likely yes!) I'm missing here ?
