I have a simple problem with opening a new JFrame called focalSumFrame while clicking on JButton called focalSum. I am working in netBeans IDE. My code looks like this:
private void focalSumActionPerformed(java.awt.event.ActionEvent evt) {
focalSumFrame.pack();
focalSumFrame.setVisible(true);
}
It's more efficent and easier to use JDialogs and/or CardLayout for alternative pages of your program. Creating other JFrames to use as your pop-ups is a very ineffective way to go about what you're trying to do.
JDialog Information
Card Layout Information
Related
right now I´m trying to programm a little Tetris clone.
Therefore I want to have ONE jFrame, which should contain multiple jPanels (for the Main Menu, the game itself, Options, etc etc...).
I searched a bit and a lot of people say that one should use a CardLayout.
So I went to my NetBeans GUI Builder, made a jFrame switched it to CradLayout and added 2 Panels;
the first panel only contains a button, and the second panel contains my "game" (my graphical display of my Tetrismatrix, the graphical display of the next Block, and a exit button).
Pictures for better understanding:
The "Main Menu" is only a button that says "Start game" (can´t post more than 2 links because I´m new).
My current "Game Menu"
The structure of the "Card Layout in the NetBeans GUI Builder"
To achieve the switch between the Panels I´m using this (found after a little research):
#Action
public void cardSwitcher() {
CardLayout cl = (CardLayout) (gamePanel.getLayout());
cl.next(gamePanel);
}
Pressing the "Start Game" button then calls the method cardSwitcher().
When I now run my jFrame it starts just fine, I see my Start Game button and everything. But as soon as I press the button I get an ClassCastException.
"javax.swing.GroupLayout cannot be cast to java.awt.CardLayout"
So now my question is, can I even achieve my goal to have 1 Frame with multiple jPanels in it switching these with the CardLayout or is there a easier/better way to do this?
Thanks in advance for any help.
PS: I´m sorry for wrong spelling or bad grammar, I´m not a native speaker.
In addition if the question is already answered and I was to dumb to find the Post about it I´m going to remove this post immediately. And I´m always open for constructive critic.
Yes you can switch panels in cardLayout. You should take the cardLayout directly from the component on which you defined it (probably JFrame#getLayout()) not from panel inside the cardLayout (from what you've written I assume that gamePanel is inside cardLayout).
I have found that there are many similar topics here, but my problem is something more complicated.
Background of my problem:-
I have a JFrame called Main. On this JFrame I have two buttons and one JPanel called WorkingPanel. Then I have another JPanel(called PlayerPanel) but this one is a seprate file (as a class).
Now I want that when I click a button, it should change WorkingPanel to PlayerPanel. I have wrote following code.
private void MenuButtonPlayerViewMouseClicked(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
WorkingPanel = new PlayerPanel();
System.out.println(WorkingPanel.getName());
WorkingPanel.revalidate();
WorkingPanel.repaint();
WorkingPanel.setVisible(true);
Window.revalidate();
Window.repaint();
}
Please guide me, Thanks.
I have found that there are many similar topics here, but my problem is something more complicated.
On the contrary, your description is of a rather basic problem that is very easily solved by using a CardLayout. I suggest that you do this now. If you had it in place your method could be as simple as:
private void MenuButtonPlayerViewMouseClicked(java.awt.event.MouseEvent evt) {
cardLayout.show(cardPanel, WORKING_PANEL);
}
where cardLayout is your CardLayout variable, cardPanel is the JPanel that displays the "cards" that displays the swapping JPanels, and WORKING_PANEL is a String constant that you used when you added your WorkingPanel instance to the cardPanel.
Point 2:
Don't use a MouseListener on a JButton as it won't behave correctly. For instance, if you disable the button via setEnabled(true) the button won't truly be disabled. Instead use an ActionListener with JButtons as the tutorials will show you. That is what they are for.
Edit
For examples of CardLayout-using GUI's, please check out:
getting Jcomponent from other class changes frame size
Java CardLayout Main Menu Problem
Change size of JPanel using CardLayout
Java CardLayout JPanel moves up, when second JPanel added
Java swing; How to toggle panel's visibility?
Clear components of JFrame and add new componets on the same JFrame
gui multiple frames switch
JLabel displaying countdown, java
This one is unusual in that it uses a CardLayout and has one panel fading into the other panel:
CardLayout showing two panels, flashing.
You could use CardLayout instead of that approach. You will be able to switch between different panels very easy and efficiently. It's also wort of mentioning that use of CardLayout is less verbose approach.
Use a CardLayout, containing your two panels, but only showing one at a time. The CardLayout is documented, with examples, in the Swing tutorial.
I'm trying to set a variable to be a new JPanel and then add it once a button is pressed, but it is not working and I don't know why.
code:
private void nextButtonActionPerformed(java.awt.event.ActionEvent evt) {
remove(scriptPanel);
scriptPanel = new GemPanel();
add(scriptPanel);
validate();
repaint();
pack();
}
GemPanel is just a JPanel class I made. When I press the next button, it re-sizes the frame to be as small as possible and nothing actually happens. If I re-size it to normal, the original scriptPanel is still there.
What gives?
Instead of trying to remove and add entire panels, a better, less problem prone approach would be to use a CardLayout that will allow to swap views. You can see more at How to use Cardlayout
Also, by the looks of your method signature, it seems you're using the Netbeans builder too. You may also want to take a look at How to Use CardLayout with Netbeans Gui Builder
I'm a java beginner, and I'm now on the GUI.
My problem is that to make my gui I've made several panel in different classes like connexion panel, menu panel etc... and for each panel I've a button which should interact with my JFrame window. So I don't know for example how the button in the menu will interact with my JFrame window (which is in a different class) to refresh it and then to put another panel to replace it .If someone can help please?
i'm a java beginner , and i'm now on the GUI , my problem is that to
make my gui
please to read offical Oracle tutorials Using Swing Components before asking a question here in Creating a GUI With JFC/Swing
i've made several panel in different class like connexion panel , menu
panel etc.... and for each panel i've a button which should interact
with my JFrame window .So i don't know for exemple how the button in
the menu will interact with my JFrame window (which is in a different
class )to refresh it and then to put another panel to replace it
seems like as CardLayout is best solution without unwanted side effects
I am developing an application which needs to pop up new JFrame B with different components, when I click on a button on JFrame A. How do I achieve that?
I don't want to use the tabs.
Use a JDialog , problem solved!
See this java tutorial for more help : How to Make Dialogs
I'm not sure why no one has suggested CardLayout yet, but this is likely your best solution. The Swing tutorials have a good section on this: How to use CardLayout
In a nutshell (a simple solution), you register a listener with the JButton and then have the listener perform the tasks you want it to perform:
setVisible(true) for one frame.
setVisible(false) for the other one.
Regards!
One way to approach this would be to create another jFrame and then add a listener onto your button like so:
jFrameNew.setVisible(true);
This way you have a whole new frame to work with. If you want to just have a pop-up message you can also try using the jDialog frames.
Depending on which IDE you are using...for example Netbeans has a gui that makes designing interfaces slightly easier, so you can test out the different frames.