How do I dynamically update a JFrame and replace it with another JFrame without seeing the action visually,
I usually use [this.dispose] to close the current window and call a new JFrame.
Is there a better way to go about the problem.?
Don't create a new JFrame.
Instead you update the components on the current frame. One common way to do this is to use a Card Layout.
Related
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 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.
I'm new to java.I'm creating a swing based UI. I've created 2 frames, each one in separate .java file inside same package.
These two frames represents 2 screens (panels) of application. When Next button in first frame is clicked, it should move to second frame.
When I checked, these two classes are having main method, I think it should be correct way for creating applications. there should be only one main method.
When Next is clicked, I'm trying to make setVisible(false) for main panel of first frame and setVisible(true) for main panel of second frame. But this cannot be done, since the panels within a class are private. Any resolution for the above problem?
As I'm beginner, Can somebody suggest me in how to start up with these kind of applications? what are the guidelines that need to be followed? And please help me in finding documentation related to starting up with the development of such applications.
After going through the answers, My comments are:
I used the following code to go to next panel from first panel, but didn't worked.
private void gotoNextPanel(){
// jPanelFirstScreen.setVisible(false);
JPanelSecondScreen jpanelSecondScreen= new JPanelSecondScreen();
jpanelSecondScreen.setVisible(true);
UpgradeUtilityGUI upgradeUtilityGUI = new UpgradeUtilityGUI();
upgradeUtilityGUI.removeAll();
validate();
repaint();
// upgradeUtilityGUI.add(jpanelSecondScreen);
upgradeUtilityGUI.getContentPane().add(jpanelSecondScreen, "card2");
jpanelSecondScreen.setVisible(true);
validate();
repaint();
}
I'm using netbeans, and 've added two panels to the cardlayout of frame. And when I use the above code to change panels, Nothing is happening, the first panel is still appearing. Can somebody tell me, how to write code for moving from one panel to another when both the panels 've been added to cardlayout of jFrame ?
Use a CardLayout, as shown here (and one frame) as mentioned by others.
When Next is clicked, I'm trying to make setVisible(false) for main panel of first frame and setVisible(true) for main panel of second frame. But this cannot be done, since the panels within a class are private. Any resolution for the above problem?
Make the panels public access level and they will be available from other packages.
One problem in that code snippet is implied by the line:
UpgradeUtilityGUI upgradeUtilityGUI = new UpgradeUtilityGUI();
It goes out of scope before ever being added to a container. Also, their should be no need to remove anything when adding a new card to the layout, and no need to call repaint().
If your application is as simple as having only two panels you shouldn't create two JFrames. You should create a JFrame with two JPanel each of them contains the neccessary information for you. If you are ready with your first panel you can call setVisible(false) on it, and call setVisible(true) on the 2nd frame. It is the one of the most easy-to-understand solution.
But, it only depends on you if it is good for you or you would like to use some more detailed solution.
Don't use two or more JFrames, nor with separated and compiled Jar files, this is road to the hell, better would be look at CardLayout,
What you should do is have a single JFrame for the application, then you add and remove JPanels as you want to move between screens.
Each of your JPanels should basically have the following...
1. A JButton called "Next"
2. A ButtonListener for each button, that tells the JFrame to load panel2, panel3, etc.
As part of the ButtonListener, you basically just want to call something like JFrame.removeAll() to remove the existing panel, then JFrame.add(JPanel) to add the next panel.
By having 1 JFrame, you also only have 1 main() method.
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.
I'm developing a desktop application using NetBeans IDE.
1) I'm opening a new JFrame after a button click. While I'm closing any of the opened frames, both are getting closed.
2) And I want to update a new Tabbed JPanel on a JFrame after button click.
Thanks in advance.
Probably you are using the wrong argument. I guess for the JFrames that you want to close without closing the entire application you are doing:
jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
While to actually close only the desired frame without closing rest of the frames you need to do:
jFrame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
1) Why did you create lots of Top-Level Containers on Runtime, create only one JFrame and other would be JDialog(Modality) or JWindow(un-decorated), re-use that,
2) really no battery included in my Magic Globe today, for better and sooner hepl you have to post here SSCCE
I want to update a new JTabbedPane on a JFrame after the button click.
You can just update via a reference to the tab's JPanel and call repaint(), but sooner or later you should consider the Model–View–Controller pattern.