jlabel

Customize JOptionPane Dialog

You can simply add your components to a JPanel and then add this JPanel to your JOptionPane, as shown in this small example : import java.awt.*; import java.io.IOException; import java.net.MalformedURLException; import java.net.URL; import javax.swing.*; import javax.imageio.ImageIO; public class JOptionPaneExample { private void displayGUI() { JOptionPane.showConfirmDialog(null, getPanel(), “JOptionPane Example : “, JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE); } private JPanel … Read more

find out if text of JLabel exceeds label size

The ellipsis is added by the label’s UI delegate, typically a subclass of BasicLabelUI, as part of it’s layout and preferred size calculation. The method layoutCL() may be overridden to examine the geometry, as shown on this example. As a practical matter, I’d ignore the elision and show the full text in a tool tip.

Image resizing and displaying in a JPanel or a JLabel without loss of quality

Of course you can resize the image there are many different ways like Image#getScaledInstance(int width,int height,int hints), but this has its perils. The main problem being: Image.getScaledInstance() does not return a finished, scaled image. It leaves much of the scaling work for a later time when the image pixels are used. I would not recommend … Read more

Moving JLabel to other JLabels – GUI

nb: I don’t like null layouts, I don’t condone null layouts, I would prefer to have used custom painting, but that’s a lot of work not related to the question. This example is intended to focus on the implementation of a Timeline and KeyFrame animation Because you have to move the object through both the … Read more

Update a Label with a Swing Timer

I don’t really understand your question why you are using the Random, but here are some observations: I want to update a JLabel with the countdown, every second. Then you need to set the Timer to fire every second. So the parameter to the Timer is 1000, not some random number. Also, in your actionPerformed() … Read more

How do I set a JLabel’s background color?

Use label.setOpaque(true); Otherwise the background is not painted, since the default of opaque is false for JLabel. From the JavaDocs: If true the component paints every pixel within its bounds. Otherwise, the component may not paint some or all of its pixels, allowing the underlying pixels to show through. For more information, read the Java … Read more