I have seen a program and was hoping to replicate one feature of it in my program. The program is a flashcard app, and when you create a new deck it adds another section to the homescreeen. I will attach images. I would love some advice on how to do this.
One of possible way is to use correct layouts, here is examples. Using this you may dynamically add any components (labels, images, buttons etc.) into your JPanel (I recommend to use JPanel as main container of all components instead of JFrame that should be one and just contain your JPanel).
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I have read many different topics and information sources but I can't really understand the differences of containers in java I know JPanel, JFrame and Container are similar and should be used at different levels within the construction of a program and I know there is JWindow and acts relatively the same. I am fairly new to programming so I am just unfamiliar with the setup. Here is what I have found out/assumed about each one, please correct me if i'm wrong.
JPanel is for the integration between JFrame or a Container typically separating different sections for labels, buttons, sliders etc...
JFrame acts as a receiver of JPanels and can construct them based on instructions from the coder, JFrame can also take the same labels, buttons, sliders etc....
Container is the same as JFrame though I am assuming container is a parent of JFrame.
I'm unsure of JWindow I just found out about this one.
Both JPanel and JFrame are Containers, yet more specialized for specific purposes. And yes, you have to assemble them correctly so they act as your user interface.
But as Container does not do much on it's own you probably never put that into your UI directly. Use it as base class to construct more specialized other classes.
To move along get some simple example running, you could follow the Java Tutorials.
i have 5 jFrames in my java project. And i want to make like a Main Menu.
I mean, i want that the program starts with a jFrame and when i click a button insteand of open the jFrame, all the elements like labels, buttons and tables are being shown in my principal jFrame.
And if i click other button the main frame will clean and charge other jframe.
It is possible? im programming with java jdk 8 and netbeans.
Thanks
Edit:
I think who marked duplicate didn't understand my question. I don't want to open or close the frame, or other frames, I want to load the structure and components of several in the same frame. Please read my question before you start complain that is duplicated
i have 5 jFrames in my java project.
And that's a problem.
And i want to make like a Main Menu. I mean, i want that the program starts with a jFrame and when i click a button insteand of open the jFrame, all the elements like labels, buttons and tables are being shown in my principal jFrame. And if i click other button the main frame will clean and charge other jframe.
Yes this can be solved by getting the contentPane (usually a JPanel) from the JFrame whose content you want to display within the currently displayed JFrame, and making it the contentPane of the displayed JFrame, for example:
// create the new JFrame, the one whose content you wish to display
NewJFrame newJFrame = new NewJFrame();
// get its contentPane
Container newContentPane = newJFrame.getContentPane();
// add this content pane into the displayed JFrame
displayedJFrame.setContentPane(newContentPane);
// revalidate and repaint the JFrame so that its new data is well displayed
displayedJFrame.revalidate();
displayedJFrame.repaint();
// displayedJFrame.pack(); // and you might need to do this if sizes are way off
But this extra gymnastics is bulky, prone to bugs and unnecessary. You are painting yourself in a corner by having your class extend JFrame, forcing you to create and display JFrames, when often more flexibility is called for. In fact, I would venture that most of the Swing GUI code that I've created and that I've seen does not extend JFrame, and in fact it is rare that you'll ever want to do this. More commonly your GUI classes will be geared towards creating JPanels, which can then be placed into JFrames or JDialogs, or JTabbedPanes, or swapped via CardLayouts, wherever needed. This will greatly increase the flexibility of your GUI coding.
For this situation what I recommend is that you do that, that your GUI classes create JPanels, and that you add the ones that you want to swap to a JPanel that uses a CardLayout. And then whenever you want to show a different "card", call show(...) on the CardLayout object, passing in the JPanel that uses it, as well as the String key that was used when adding the "card" JPanel to the CardLayout-using JPanel. This is all well-explained in the CardLayout Tutorials.
Other useful links:
For rationale on why to avoid manually swapping please see: What's so special about CardLayout vs manual adding/removal of JPanels?
For using a CardLayout to help control a "multi-page" application with multiple classes, please see: How to Integrate Multi-page Java Desktop Application from Multiple GUI Classes
I am trying to learn some Java GUI stuff. I am trying to create a special jPanel, which I have created in another class [it is a Panel with two labels on it] inside one class, and using a passed JFrame add it to that JFrame from the other class. I have been trying myJFrame.add(thePanel) and such, but it never seems to actually do anything. I have tried doubly making sure it is sset to visible, is at a reasonable location, ect.
I am trying to create the panel in one class, and .add it to the given jframe. There is probably something I am not understanding.
I am not the best at the java GUI stuff... so please be kind :) Any advice you can give would be wonderful.
I am using Netbeans. If I drag the special Panel I created over to my panel in the Design editor, it adds an instance of that panel, but I can't seem to make my own instance of this and have it appear.
I am somewhat new to the whole java swing scene, and I just want some clarifications due to a slight confusion I have. I have learned about orientation and buttons and all the basics. Also pointing to some good (non oracle) tutorials will be highly appreciated.
As far as I understand, we have our JFrame which is a window.
Then our JFrame consists of ContentPane, which I am using a container for.
Container content = frame.getContentPane();
Now that I have this container, can I add more containers within those containers? Let's say that I would like to have different parts that do different things, and for that I would like to create classes and such that each handle their own containers?
So what I am asking for is, how does one go about storing different content within the container? What is the proper way to go about it?
An example I would give is let's say I have a scoreboard (for soccer) that is on the top part of the window, on the middle part of the window there is some work related business stuff, and on the bottom part of the window I have some textbox that does its thing with a few buttons.
Sorry if this question is stupid, I am just trying to learning swing, and want to know proper way to arrange different components within the window.
Yes, you can. Create an instance of JPanel and add your components to it, and then add them to the frame's content pane using a string:
JPanel panel = new JPanel();
//code to add stuff to the panel
frame.getContentPane().add("Center", panel); //"North", "South", "East", "West", or "Center"
I am creating a JList dynamically and I want to use it on different JPanels where I can call a setQuery(query); on it. There is a Search Button + field connected to it too. Is there a way to place the JList, search button and search field on like 10 different panels without having to duplicate the code everywhere? I can't place it on a seperate JPanel as it has other buttons / gui elements that need be around it depending on what JPanel is being displayed. I've looked everywhere but there is not much mention of reusing a dynamic JList.
You can place a component in one visualized container only. Consider creating a method that creates these components for you, that returns a JPanel that holds the components, and perhaps have all created JLists share the same ListModel, and all JButtons the same AbstractAction.
Or another option, if you are using CardLayout to swap JPanels, and you want all of the panels to hold these components above, consider not doing this but moving the JList, JButton, and JTextField out of the cards and on to a less dynamic portion of your GUI.
Also, this is not clear to me:
I can't place it on a seperate JPanel as it has other buttons / gui elements that need be around it depending on what JPanel is being displayed.
Please clarify and tell us more. Images might help as well.
Also consider the decorator pattern Your list/search panel would be the main component, while the variations would result from decorating the original.