I can replace any given JFrame icon in Swing with a call to JFrame.setIconImage(). However, I have an existing application that pops up lots of JOptionPanes and other JFrames/dialogs, and rather than track them all down I'm wondering if there is a way to switch these over to my custom icon all in one place? Also, in some instances (ProgressMonitor, for example) I don't have access to the actual JFrame to fiddle with.
You can store the JFrames you created on a List. Then, you can use a loop to get every frame on this list, and apply the icon.
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I am making project with GUI. The thing is, that I have a button and what I need to do is that after clicking this button I need to change Frame layout. For example, like when you are installing some program and you click "next" button, the Frame layout changes and you can see some different content. Basicly, dynamic wizard.
I have tried use another Frame, but it opens in another window and that is not what I want. I want to open it in the same window.
Another thing I have tried is set visibility of these components I don't want to be displayed to false, but I find it unprofessional and it is overlook in making a desing, when I have components over themselfs.
So do you guys have any idea? Thank you.
Most of the times for a wizard like GUI, you should have JFrame and a set of JPanels. In each step you can pass the shared data as constructor arguments to each panel, and when you are making one of them invisible and make another one visible, you can get some date from the previous step panel and pass it to the next step panel(if needed).
It is very common that your panels extend the JPanel and have some argument in their constructor(s). You use these data for initializing your panel and managing the state of the overall progress.
There is no a total plan for all situations. So you should decide what to do which is best fit for your case.
Try not to have multiple JFrames.
Hope this would be helpful.
because I am displaying multiple images in my java programm, each image into a new jframe.
I need to identify the selected jframe in oder to make changes on the displayed image and show it in the same jframe.
So, How could I recognize the last selected jframe ?
I suggest you to use some other layout such as CardLayout to share same display space for multiple panel instead of using multiple JFrame.
See The Use of Multiple JFrames, Good/Bad Practice?
If you want to stick with current approach then create a global static reference of type JFrame to keep the reference of selected JFrame.
Use FocusListener to keep track of the selected JFarme
So, How could I recognize the last selected jframe ?
Keep the references of all opened JFrame and iterate all to check for JFrame#isFocused() or JFrame#isActive()
I always wondered on how can I make a program with multiple JFrames. I mean I just want one class to handle all the GUIs and stuff but how can I effectively do this? A lot of tutorials say that we make JFrame by inheriting from JFrame. But what If I want many frames?
Ex:
Title of Application in one frame with some options
Menu is one frame
Main working application is one frame
Like in a game.
But I am not sure if I am pertaining to JPanel? I am completely puzzled with the 2. I just want one un-moving frame but basically the content of the frame is changing.
When I click START for example, it will change to the gaming style of frame.
you are looking for a JFrame with a CardLayout. Some background:
A JFrame is the physical window. It comes with a title bar and three buttons: minimize, maximize, and close. Think of this as a picture frame.
A JPanel is a "content holder" of sorts. Typically, you put your other components (buttons, animations, whatever) on a JPanel, and then slap that JPanel into a JFrame. Using our picture frame example, a JPanel would be the photo paper you put in the picture frame. The other components would then be the actual contents of the picture itself, and what you have at the end is a nice picture...or in your case, an application.
Setting the JFrame to utilize a CardLayout essentially lets you have multiple JPanels inside the same JFrame at once, while still only showing one at a time. So for your application, you would have (at least) two JPanels: one for the menu, and one for the game. When the app starts, you show the MenuPanel. When the user clicks "start", you switch to the GamePanel. The MenuPanel will be put in the background and will be inaccessible until you call it to the foreground again.
If, on the other hand, you create multiple JFrames, you will have two or more physically separate windows that can be dealt with individually. This can actually be kind of cool for game development. Although it takes more time to build and link the GUI for the second window, you can then have that window affect game settings in realtime (rate of fire, bullet strength, player speed, etc.)
I think that what you are after is the Card Layout:
A CardLayout object is a layout manager for a container. It treats
each component in the container as a card. Only one card is visible at
a time, and the container acts as a stack of cards. The first
component added to a CardLayout object is the visible component when
the container is first displayed.
You can see how it is used here.
This layout manager allows you to manage situations where your frame needs to be shared across various functions. In your case for instance, you could have a functionality to handle the settings section of the game and another one to handle the actual game itself.
You could then use the manager to switch between these particular items.
you can also use Desktopane() and InternalFrame() for multiple frame.
Internalframe quite similar to Jframe but it need to setVisible(true) or show() everytime.
Which ever IDE you are using, you can create multiple JFrames in the same package, and have separate codes for each of them.
If you want to link each frame, you will have to create instances from each JFrame. for example, if when the button is pressed, we need to invoke a new Frame (that we have already created)
NewJFrame1 frame1=new NewJFrame1();
frame1.setVisible(true);
then you can decide what to with your current JFrame.
eg : (Hide, Close)
I have developed my Java code in Netbeans, and now I want to develop the GUI for my application.
The application communicates with a server, so it's going to have a login frame for sure. After that there will be a main frame. From the main frame the user can choose where to go and as you can understand there will be a lot of frames.
I have already developed a version of the application where there are a lot of frames and using the "setVisible()", but I want something better looking. I want a stable frame and inside it, changing the panels or something similar.
How would I do this?
You might use JInternalFrames if you like them, or simply use a main panel with a CardLayout, and display the appropriate card depending on the clicked menu item, or the selected JTree node (as it's done in Windows Explorer and similar applications).
Use the Swing tutorial to get you started.
You can, at any time, make any Container object a JFrame's ContentPane. You can also add and remove Containers from any other Container. If you want a user to be able to jump to any of a dozen panels at any time, CardLayout, as suggested in another answer, is easily the best route. If, however, you intend to lead the user along a somewhat controlled path, you can start with a login JPanel. When that's done, you can create the next panel (a JPanel or something else), add it, and dispose of the first one. And so on until the user exits.
If the transition from one panel to another affects nothing else in the program besides the two panels and the parent Container (JFrame or descendant), this is probably the way to go. If a bunch of other places in the program need to know about the change, you'll want a more centralized mechanism, maybe using CardLayout.
In my program I have two JFrame instances. When I click next button I want to show next frame and hide current frame. So I use this.setVisible(false) and new Next().setVisible(true). But in Next window if I click back button I want to set previous frame to be visible again and next frame must be ended (which means it must be exited).
Is there any special method(s) to do this? How can I do it?
Consider using CardLayout instead of hunting for how many JFrames there are. Then..
only one JFrame would be needed
any of Next/Back Actions will be only switching between cards
There are lots of examples in this forum - e.g. as shown here.
That is an odd & quirky GUI. I suggest instead to run a JFrame for the main GUI, and when the user wants to search, pop a JOptionPane (or modal JDialog) to accept the details to search for. This will not have the effect described above, but will follow the 'path of least surprise' for the end user.
If you want to destroy a JFrame releasing all associated resources you shold call dispose() method on it.
You may place your JFrames on a list data structure and keep a reference to current position according to the window you are displaying. In that way it will be easy to move to next and previous. But note that each frame added to the list will use memory and will have its state as you placed it in to the list.
If you are trying to create a wizard like UI, you should look up Sun(oracle)tutorial here.
create the instance of your main window in next() window.. and use same method which you chosed befoe to hide your main window, for example if your main window is named as gui then what we have to do is.
gui obj = new gui();
and if you click on back button now than do these also
this.setVisibility(false);
obj.setVisibility(true);
that's all you need.
good luck.