I have written a swing application in Java and want to display the logo of the application at program start-up for a couple of seconds before the actual program GUI appears. How do you think I can do this in swing?
A built-in Splash-Screen Functionality was added in Java SE 6, take a look here .
You can use SplashScreen: SplashScreen.getSplashScreen().setImageURL(imageURL)
If it does not meet your requirements for some reason you can either create instance of java.awt.Window or javax.swing.JWindow and put image at the middle of the window. Use Timer to disappear this window after specific timeout.
You can also use Frame or JFrame and call its f.setUndecorated(false)
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I am developing a Java Desktop application.
Whenever I launch a Java app from command prompt It launches from Left Top corner of the windows screen.
I want to determine like to launch the application from center of the screen like.
How to do this.
If you're using Swing, on your JFrame containing your code use
Note that this will also work on anything else extending from java.awt.Window
JFrame.setLocationRelativeTo(null);
This will set your JFrame relative to nothing, and it appears in the center of the main monitor
Check the documentation on java.awt.Window HERE
I'm writing a program that currently switches back and forth between different JPanels placed on a JFrame that also has a JMenuBar. (We're required to use Swing.)
I need to write a tutorial and right now I have it giving step-by-step instructions from a popup window. However, it doesn't seem to resonate well with test users and quite frankly it's annoying to switch back and forth between screens.
After checking out JDesktopPane and JInternalFrame it seems to make sense to place my entire program in a desktop pane and then create the tutorial using an internal frame. I'm worried that this will force me to place my different screens each in an internal frame which is NOT what I want to do. I just want the tutorial to be an internal popup(?) that can be minimized and moved around if necessary.
Am I going about this the correct way or is there a more efficient/practical way to implement the same tutorial popup feature?
I'm not 100% clear on your problem -- is it that your tutorial keeps popping up new windows for each step? I would assume that you wish both the main program and the tutorial to both be in view while the tutorial is running, and if this is so, perhaps the tutorial should reside in a non-modal JDialog, and then you swap tutorial screens via a CardLayout. ... unless I'm mis-reading your requirements and problem.
Multi-window applications often have a main-window, and all other windows are kind of 'parented' to it. Minimizing such a sub-window will hide its content and show the title-bar at the bottom-left of the screen. Also, these windows do not have their own Icon in the Task-bar, only the main-window does.
How can I make a window being attached this way to another window?
If that is possible, is it also possible without a referenfe to the actual main window?
#2: I'm embedding Java into such an application and I would like to be able to use awt or swing additionally to the native dialogs, which have this behavior by default.
See How to Use Internal Frames.
have look at JInternalFrames for MDI application
read Oracle tutorial, try code example
my question is two folds:
Can you pass the screen of one Swing application to another Java program so the latter can act as a "viewer" of the former? Perhaps by passing a buffered image? Can you do this for an existing Java application without code change? (if Swing allows getting the buffered image of any component by default)
A related question is let's say the above is possible and the Swing application is minimized but constantly changes its screen. Does Swing update its screen (perhaps buffer) so the previewer can show it appropriately? Does the OS matter in this case?
Thank you!
all swing compoments are serializable, so you can store and send any view to other application
1) You can create a BufferedImage of any Swing component. Screen Image does the work for you.
2) I've never tried it,but I don't see why your couldn't recreate the image as needed.
Is it possible to write a Java application (Swing / JavaFX) who doesn't get the focus when launched? So that the application who had the focus before keeps it's focus?
Yes, sure. First if you create Window (not frame or JFrame) it does not get focus by default.
Second, just call f.setFocusableWindowState(false); on your frame and get the same behavior.