These methods are not popped up while creating the object (ctrl + spacebar). Do I have to add any other package for this to work??
Do I have to add any other package for this to work?
No. They are methods inherited from parent classes that should not be used by programmers. Instead, layout managers should use them.
Edit
I'd thought this was to do with component size and location within a frame. It was only after looking more closely at the (horrible(1)) pictures of the screen I realised they were methods related to a JFrame, which changes the answer slightly.
setSize(..) should be not used, but pack() should. The former is no better than a guess, while the latter (called after components are added via layouts) will produce the correct size).
setLocation(..) is also less than optimal. setLocationRelativeTo(null) will center a packed frame on-screen, while setLocationByPlatform(true) (which I prefer) will place the app. in the position (determined by the OS) for the 'next' application (usually they will be stacked and offset slightly).
Coming back to the (1) note above:
Don't take pictures of a computer screen. All OS offer the ability to create a screenshot of either the current screen or the current app. In Windows that would be Print Screen for the entire screen or Alt + Print Screen for the focused app.
Your question is about eclipse's content assist, right?
If so, then please look at Window -> Preferences -> Java -> Appearance -> Type Filters. If there java.awt.* is selected, then methods of Component like setSize and setLocation are not shown.
Related
I'm trying to make all my components to resize properly with JFrame Netbeans, but if I put the auto resizing to my components, it has like a margin between them, and if I try to put them together, it messes up the components , and I need them to be touching each other.
Thanks!
Double-click on the extra space between the components: it should open a dialog where you can change its size.
You can also click the extra space, and use the mouse wheel.
Netbeans form designer is very powerful and handy when you master it, but it requires some effort at first, especially for large user interfaces. If not already done, take some time to follow this tutorial: https://netbeans.apache.org/kb/docs/java/quickstart-gui.html
Also, if your user interface is large, it's better to break it in several smaller panels. You can design each panel independently with the form designer.
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.
I am creating a game in java using Swing.
I am using
mainJFrame.setExtendedState(mainJFrame.getExtendedState() | JFrame.MAXIMIZED_BOTH);
on my JFrame to start it as a maximized window.
After this I am using
mainJFrame.pack();
to be able to get the correct x & y coordinates of components in the GUI. I need those coordinates since i'm painting custom images to the GUI. So far everything is fine.
When a user has passed a level, i rebuild the GUI to updated it to the new level settings and then i call pack() again.
When calling pack() the components are placed in the wrong place, slightly below where they are supposed to be.
However, manually resizing the window causes the components to go to the right place again.
I have tried calling mainJFrame.revalidate() and mainJFrame.repaint() after the pack() but this gives no effect.
If needed I can supply printscreens and code.
Thanks for your time.
Manually resizing the window validates the enclosing container and all of its subcomponents. To avoid the effect you describe, call setVisible() only after you have added components and invoked pack(). More related suggestions may be found here. If the problem persists, please edit your question to include an mcve that exhibits the problem.
I have a general question that is Java related.
I am writing an application that has a GUI menu. I am trying to change one part of the GUI menu based on the selection of a Radio button.
Do I need to:
Redraw the whole window or just update that part with:
setVisible(true)?
If I just use the statement from #1 above .. the GUI is fine -- until I move the mouse over it and then I see the previous button choice. What am I doing wrong?
Swing components have a repaint(), revalidate(), and doLayout() method. One of those should probably be able to redraw whichever pieces you want. However, doLayout is not something that you should be taking responsibility for, that's the layout engines responsibility.
You may also want to check out this post, the first response has a pretty good explanation, and links to an article with more detail.
In terms of the second part of your question, I'm not sure, but we may need to see some code to get an idea. Is the 'replaced area' actually being removed from the view?
..in my application the user select which device platform type they want top test (that choice is a set of two radio buttons on the left). When the user selects either Android or iOS, the center grouping of check boxes changes to reflect a group of android devices they can test or a group of iOS devices that they can test.
Put a panel in the 'center grouping'.
Use a CardLayout for the panel.
Add both iOS & Android controls to the panel with the card layout.
Flip between them as needed.
Call revalidate() on the top level component.
So when I start up Netbeans, they create a little panel on the desktop for showing the progress of loading. I'm pretty sure Microsoft Office 2010 uses this too. I was curious how to make one of those in java?
I looked through the API and saw JDesktopPane. But I don't think that's what I'm looking for unless you can take that and put in on the actual desktop, but I'm unsure. Thanks in advance!
you can actually do it using JPanel.. you don't need to do anything else..no need of desktop pane
all you need to do is design a JPanel and put a progress bar inside it that will link to a process and show how much it has been completed.
JPanel doesn't have normal frame functionality like minimize, Close etc and will act exactly as you are trying to make up.
Update : Just tried doing what you wanted.
You need to start working on JFrame. and set its decoration to false.
in Netbeans, you can just go to Frame properties and set Undecorated to true
or inside code you can just write setUndecorated(true);
then you have to design your frame, put a progress bar inside it, link it to a function, set its onTop value to true (which means it will always be on top) and set its position to center of screen. done!! you are ready with your window!!