On the JDialog you’ve created you should call pack() first, then setLocationRelativeTo(parentFrame), and then setVisible(true). With that order the JDialog should appear centered on the parent frame. If you don’t call pack() first, then setting the location relative to the parent doesn’t work properly because the JDialog doesn’t know what size it is at that … Read more
but when i run it i get this: You get an empty screen because you add the components to the frame after the frame is visible. As has already been suggested you need to use an appropriate layout manager. FlowLayout is the easiest to start with. invoke setVisible(true) AFTER adding the components to the frame. … Read more
Here are a few suggestions: Use a GridLayout for the top panel; in this case, zero means the number of rows is determined by the specified number of columns and the total number of components in the layout: JPanel north = new JPanel(new GridLayout(0, 9)); Here’s an outline of how you can make your center … Read more
The problem is, the JFrame‘s default Layout manager is a BorderLayout, this means that your ShowImage pane is filling the entire area of the frame (in black). I bet if you changed the background of the ShowPane to red. It would show up completely filled in red instead Now you can have a look at … Read more
Do not add components to JFrame after the JFrame is visible (setVisible(true)) Not really good practice to call setSize() on frame rather call pack() (Causes JFrame to be sized to fit the preferred size and layouts of its subcomponents) and let LayoutManager handle the size. Use EDT (Event-Dispatch-Thread) call JFrame#setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE) as said by @Gilbert Le … Read more
This is a simple example for adding the background image in a JFrame: import javax.swing.*; import java.awt.*; import java.awt.event.*; class BackgroundImageJFrame extends JFrame { JButton b1; JLabel l1; public BackgroundImageJFrame() { setTitle(“Background Color for JFrame”); setSize(400,400); setLocationRelativeTo(null); setDefaultCloseOperation(EXIT_ON_CLOSE); setVisible(true); /* One way —————– setLayout(new BorderLayout()); JLabel background=new JLabel(new ImageIcon(“C:\\Users\\Computer\\Downloads\\colorful design.png”)); add(background); background.setLayout(new FlowLayout()); l1=new JLabel(“Here … Read more
Basically, you need to make a transparent window and a translucent content pane. This will mean anything added to the content pane will continue to be rendered without additional alphering… public class TranscluentWindow { public static void main(String[] args) { new TranscluentWindow(); } public TranscluentWindow() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try … Read more
If you don’t need much in the way of custom behavior, JOptionPane is a good time saver. It takes care of the placement and localization of OK / Cancel options, and is a quick-and-dirty way to show a custom dialog without needing to define your own classes. Most of the time the “message” parameter in … Read more
Try this. addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.out.println(“Closed”); e.getWindow().dispose(); } });
You need the line frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); Because the default behaviour for the JFrame when you press the X button is the equivalent to frame.setDefaultCloseOperation(WindowConstants.HIDE_ON_CLOSE); So almost all the times you’ll need to add that line manually when creating your JFrame I am currently referring to constants in WindowConstants like WindowConstants.EXIT_ON_CLOSE instead of the same constants declared … Read more