Summary In Swing there is the possibility of validating and invalidating JComponents. invalidate() marks a component-hierarchy as invalid and either it is then validated programmatically or implicitely validate() validates a component hierarchy, i.e. basically checks layout and ensures it is uptodate revalida…
Tag: swing
How to change the default JFrame Window color?
I am building an app for Windows using Java Swing/AWT interfaces in IntelliJ Idea. I am using a default JFrame to display my application GUI. However, I would like to change the default frame outline (window) colour to either transparent or custom colour. Here is what I am trying to achieve: This is the windo…
How to implement the wait(); statement properly?
I’m getting an issue when I’m trying to make a tic tac toe game. The Issue that I’m coming across is presented when I’m trying to use a wait(); statement in order to pause the game so the player is able to look at who won the game and what the winning squares are, however when I try to…
Cannot display JComboBox in JTable with TableModel
Below code to display a JTable with 3 columns, which respectively contain a JComboBox, a String and a double, and which should display yellow. The problem is that I cannot get the JComboBox in the first column to display as … a combo box; instead I get a String saying “javax.swing.JComboBox……
How to place GUI components in java in the center?
I’m trying to create a mini form, that suppose to look like this: So far I got this: The problem is that I need to have this gap from the left, so that my form will be at the center, but I don’t …
Any workaround for Java/Swing bug under Mac OS when opening new windows as tabs
I’m developing a swing based Java application (Java 8) for Mac and Windows. Some users have set the mac system preference under “General” “Prefer Tabs when opening documents” to &…
How can make a JTextArea?
I am trying to make a textArea for my input, but it broke my code. It does not draw the characters or grid any more, and all I see is a small button in the top right corner. Screenshot of output Here’s my code with the JTextArea: What can I do to make my code work with the JTextArea? I
How can I access the same text area variable?
The code below works as such: User clicks the run button Program reads the file from designated location Program removes content from , including tags themselves Program …
(TXT File) Java GUI Login
I want to login from a text file called “members.txt” which using 2nd (username) and third (password) line with “/” delimiter. But when I run it, it seems they recognize all of text file’s account in sequence. Please help. Here’s my code. Answer Actually you are reading eve…
I am not able to load a graph via JFileChooser and actually display it
So, I have a class that inherits from JFrame with two JSplitPanes and a menu bar. One JSplitPane has a JSplitPane on top and a textarea on the bottom and the other one two JPanels left and right. I want to parse a pnml-file (or more, but I’m just trying to get one working right now) that I chose via