How do i change jframe image icon

There may be different size values needed: Sizes of frame icons used in Swing — spongebob. You can set titlebar icon using setIconImage of JFrame and image must be. Here is an Alternative that worked for me: yourFrame. Mmir Mmir 3 3 silver badges 10 10 bronze badges. The only one which answers how to use the image if it's a resource. Gandalf Gandalf 9, 7 7 gold badges 46 46 silver badges 85 85 bronze badges. These solutions do not work. Here is how I do it: import javax.

ImageIcon; import javax. JFrame; import java. File; import java. ActionEvent; import java. ActionListener; import javax. GridLayout; import java. BufferedInputStream; import java. BufferedOutputStream; import java. FileOutputStream; import java.

HttpURLConnection; import java. URL; import javax. JFrame; import javax. JLabel; import javax. JOptionPane; import javax. TameHog TameHog 10 10 silver badges 22 22 bronze badges. Pritam Banerjee Here's what worked for me: import java.

Isaiah Patton 31 3 3 bronze badges. Jython is Python implemented with java — otterb. Tunaki k 42 42 gold badges silver badges bronze badges. You don't need the super or this in your case. You can leave it out. If you extend your class it is not really necessary. Yes you are right. Run your project. Raymond Wachaga Raymond Wachaga 2, 2 2 gold badges 23 23 silver badges 27 27 bronze badges.

The Overflow Blog. Does ES6 make JavaScript frameworks obsolete? Podcast Do polyglots have an edge when it comes to mastering programming The loadimages code is shown a little later in this section. When the actionPerformed method is called the full size image is loaded into the main display area. Each button has its own instance of ThumbnailAction which specifies a different image to show. Most often, an image icon's data comes from an image file.

There are a number of valid ways that your application's class and image files may be configured on your file server. The following figures illustrate a few of the ways these files can be configured:. If you are writing a real-world application, it is likely and recommended that you put your files into a package. Here are some possible configurations using a package named "omega":.

The getResource method causes the class loader to look through the directories and JAR files in the program's class path, returning a URL as soon as it finds the desired file.

Using the -cp or -classpath command-line argument. For example, in the case where the images are in a JAR file named images. If your image and class files are in separate JAR files, your command line will look something like:.

In the situation where all the files are in one JAR file, you can use either of the following commands:. For more information, see the JAR Files trail. In this example, the class files and the images files are in separate JAR files. This last approach is not recommended. Most of the Swing Tutorial examples put the images in an images directory under the directory that contains the examples' class files.

Applets generally load image data from the computer that served up the applet. Because the photograph images can be slow to access, IconDemoApp. SwingWorker object to load each photograph image and compute it's thumbnail in a background thread.

Using a SwingWorker prevents the program from appearing to freeze up while loading and scaling the images. SwingWorker invokes the doInBackground method in a background thread. The method places a full size image, thumbnail size image and caption into a ThumbnailAction object.

The SwingWorker then delivers the ThumbnailAction to the process method. The process method executes on the event dispatch thread and updates the GUI by adding a button to the toolbar. JButton has a constructor that takes an action object. The action object determines a number of the button's properties. In our case the button icon, the caption and the action to be performed when the button is pressed is all determined by the ThumbnailAction.

This may not be desirable in all situations. Loading a number of very large files could cause the program to allocate a very large amount or memory.

Care should be taken to manage the number and size of images that are loaded. As with all performance-related issues, this technique is applicable in some situations and not others.

Also the technique described here is designed to improve the program's perceived performance, but does not necessarily impact its real performance.

The createImageIcon method returns null when it cannot find an image, but what should the program do then? One possibility would be to ignore that image and move on. Another option would be to provide some sort of default icon to display when the real one cannot be loaded. Making another call to createImageIcon might result in another null so using that is not a good idea.

Instead lets create a custom Icon implementation. You can find the implementation of the custom icon class in MissingIcon. Here are the interesting parts of its code:. The paintIcon method is passed a Graphics object. The following tables list the commonly used ImageIcon constructors and methods.

All rights reserved. Hide TOC. Using Swing Components. Here's a snapshot of an application with three labels, two decorated with an icon: The program uses one image icon to contain and paint the yellow splats. Click any of the thumbnail images to view the full size photographs.

Hold the mouse over a photograph. A tool tip appears that displays the photograph caption. WHITE ; g2d. BLACK ; g2d. RED ; g2d.