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To set the default button to suppose jButton4 the following code has to be used: this.getRootPane().setDefaultButton(jButton4); But where to add this?
What all I tried:
I tried to add it in main function but it gave me an error, I tried to put it inside the button action performed block but it did not work, I tried to put it just before the main function it gave me an error.
Question: So where do I put this line of code so it works? I am using Netbeans GUI to make the program.
You could add this line everywhere you want to set the default button (a button click, where you create your UI etc.).
I think a nice place is where you create your UI elements.
In your case it would be, just after initComponents();
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I recently started coding with Apex and have been utilizing the 'system.debug()' method. It helps me keep track of variables in my code by printing the variable in the 'debug log'. Now I am studying Java, and I was wondering if an equivalent method exists in Java. I would like to see what my variables are in certain parts of my code.
You can use a PrintStream, like System.out to call print or println in order to display your debug. You can also redirect System.out to file using setOut.
However, if you use an IDE and a debugger, you can create a breakpoint to the line that you wish to debug and let a debugger run until it reaches your line.
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I have a problem with my project. I'm making a tool for numerical methods (a lesson in college). I have done nearly all of the project but I have a problem with my design.
When I resize it before making anything it resizes well but, if I set the size of the matrix after the matrice processes the panel isn't resizing.
The code works well if the rank is <=5, but the bigger matrices cause that problem.
I'm using window builder and the code is messy but I'll be glad if you try to help me.
Thanks for your helps!
Some of things that I noticed in your code.
Don't use null layout at all and avoid setBounds() method
Always hand over it to Layout manager to set the position and size the components.
Use ActionListener for JButton instead of MouseListener if you want to capture click event only.
Note: I can't run your code on my system due to character encoding issue. You have used some character other than English in your code.
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I created the Tab panel which is having 3 tabs, and in each tab I'm displaying chart.
My problem is I want to use arrow key to move a chart back and forth.
But when I pressed arrow it switches the tab.
How I can remove this default behavior of Arrow key of swiching tabs?
You have to unregister keybinding.
For example:
tabComponent.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("LEFT"), "none");
tabComponent.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("RIGHT"), "none");
You may want to take a look at this How to use KeyBindings.
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I wish to create a button exactly same as this (from iOS5).
You will have two images, for ON and for OFF.
Whenever you click the button, you will switch images with button.setImage(..).
Swing constraints:
Button will still be rectangular, even though the image is oval
Animation possible, but quite hard AFAIK. From the way you asked your question, I think it will take you a while to study swing more
In swing, there is JToggleButton which can have two status. However, if you want the button of the same shape and the same visual effect, you should implement it.
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I was developing an java swing application to add view and modify the list of medicines.While adding the medicines it should show the list from the database(like google search box).For example if we press "p" it should show 'paracetamol' from the database.
You should implement a change listener on the text input box, when the text is changed, run a query to the database with the contents of the input box.