Category "swing"

Swing: Intercept click on a JRadiobutton

I want to intercept the click on a JRadioButton in a button group. More precise: When JRadioButton A is chosen and the user clicks on JRadioButton B, I want to

Why does paintComponent get called only on some JPanels?

I'm trying to add a background to different JPanels (henceforth they will be called Window). These Windows are classes I created and make them inherit JPanel. T

When Grabbing a File through JFileChooser why does this fail?

I'm trying to understand Java Swing GUIs. So I created a simple GUI to select a File. When I attempt to use the FFMPEG wrapper to get file information I get the

MySQL error Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException

This is my register page: Registration was working before adding Email checker functionality. This function for check did someone used this email on database.

How do I center align the components in a Java GUI?

I am a beginner programmer and I'm currently working on a project by making a simple Login screen layout using Java. So far I'm doing pretty good, but is there

How do you embed a Swing JPanel into a JavaFX frame?

From Integrating JavaFX 2.0 with Swing and SWT there is a code that allows you to embed a JFXPanel inside a Swing JFrame. I was wondering is there a reverse of

GraphStream & Swing - Can't display my graph correctly

I'm a beginner with GraphStream and Swing, I would like to insert a Graph in a JPanel, but while trying I get the following display: Main Frame I added a graph.

How to Remove Red JFormDesigner Evaluation Text?

I installed JFormDesigner for IntelliJ with an evaluation license to convert some forms from NetBeans, and upon realizing that it put a huge ugly watermark on e

How to Overlap Panels in Swing?

I am attempting to have multiple JPanels that can "overlap", also allowing me to perform custom painting. For this I am using a MainPanel, which extends JLayere

UNDO/REDO for JTextArea

I am writing a text editor. And here I ran into a problem. I need to implement UNDO and Redo function for JTextArea. For this I use UndoManager. But, if I cance

How to combine rectangles?

I am working with the Java Swing library. I have two rectangles of the same width and height and the same coordinates. I want to combine them into one so I can

Why are none of the titles showing in JTable?

I added some rows to a DefaultTableModel, but none of them was shown. My question is - what is the problem? It seems to me like Intellij idea just playing a jo

Colored Emojis in Java Swing Labels

I was wondering how to dispaly colored emojis in swing. I have a feeling that the Swing (awt) font engine is unable to do this. I've tried using the windows emo

Drawing multiple objects in Java [duplicate]

I would like to draw multiple objects like ovals, rectangles and lines together. But somehow I can draw only an object. When I try to draw ano

Eclipse windowbuilder not showing the full frame

I'm trying to use Eclipse windowbuilder, but when I go to the design page the frame gets cut. Below is an image of what I am seeing. This is just a simple JFra

How to get file's icon and type description in Ubuntu?

With Java 11 on Windows, I can get info about my files using: import javax.swing.filechooser.FileSystemView var type = FileSystemView.getFileSystemView().getSy

Can't close JFrame, from click inside JPanel

I have the following situation: I have a JFrame(GridBagLayout) with 3 JPanels in it (headerPanel, bodyPanel, footerPanel); On the bodyPanel I have a login butto

How to fix scaling of a java-based application on a high dpi display in linux?

I just switched to java 11 (AdaptOpenJDK) so that my java Swing application looks ok on high dpi displays at different system scaling settings. It works ok on

How do I use the same variable between buttons?

I've created a rock paper scissors game in java, but I don't know how I could use the same variable to work between 3 different buttons (rock, paper scissors).

Issue on label and panel's transparency

Here there is my frame: As you can see, there are some components (JLabel, JPanel, JTable, JScrollPane) on which I called the metod setBackgroundColor(new Colo