How do I change the default application icon in Java?

Question

I'm using NetBeans, trying to change the familiar Java coffee cup icon to a png file that I have saved in a resources directory in the jar file. I've found many different web pages that claim they have a solution, but so far none of them work.

Here's what I have at the moment (leaving out the try-catch block):

URL url = new URL("com/xyz/resources/camera.png");
Toolkit kit = Toolkit.getDefaultToolkit();
Image img = kit.createImage(url);
getFrame().setIconImage(img);

The class that contains this code is in the com.xyz package, if that makes any difference. That class also extends JFrame. This code is throwing a MalformedUrlException on the first line.

Anyone have a solution that works?

See also: http://java.sun.com/javase/6/docs/api/java/awt/Window.html#setIconImages(java.util.List) http://java.sun.com/javase/6/docs/api/javax/swing/ImageIcon.html#ImageIcon(java.net.URL) — McDowell, Oct 16 '08 at 19:12

score 81 · Accepted Answer · edited Oct 16 '08 at 19:06

81

java.net.URL url = ClassLoader.getSystemResource("com/xyz/resources/camera.png");

May or may not require a '/' at the front of the path.

edited Oct 16 '08 at 19:06

Bill the Lizard

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answered Oct 16 '08 at 19:01

JeeBee

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Thanks. This is a perfect example of why we need StackOverflow. I found 100 different "solutions" by googling before I posted this question and got an answer in 5 minutes. – Bill the Lizard Oct 16 '08 at 19:05
6

It's pretty safe to put the "/" in front. Also, it lets you take the same string and do a getResourceAsStream, which is sometimes more useful. – Daniel Spiewak Oct 16 '08 at 19:09
1

Wow--the power of StackOverflow! :-) – Onorio Catenacci Oct 16 '08 at 19:11
Glad to help - I'd just not one day beforehand had to do something similar :) – JeeBee Oct 17 '08 at 11:27
1

And where is the png file actually stored? – CodyBugstein Jan 20 '14 at 09:55
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JAR/classes/com/xyz/resources/camera.png But you should be using Maven to manage your project and build, so in code it would be PROJECT/src/main/resources, and Maven will copy it into the correct place in its Jar/War creation phase. – JeeBee Sep 26 '14 at 10:54

score 14 · Answer 2 · edited May 12 '14 at 21:39

14

You can simply go Netbeans, in the design view, go to JFrame property, choose icon image property, Choose Set Form's iconImage property using: "Custom code" and then in the Form.SetIconImage() function put the following code:

Toolkit.getDefaultToolkit().getImage(name_of_your_JFrame.class.getResource("image.png"))

Do not forget to import:

import java.awt.Toolkit;

in the source code!

edited May 12 '14 at 21:39

tbodt

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answered Jan 16 '13 at 09:41

Ayoub Aneddame

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what should be the size of image, whatever i import looks too small, or scalled?? – Space Rocker Apr 05 '13 at 12:13

score 4 · Answer 3 · edited Oct 19 '13 at 19:07

4

Try This write after

initcomponents();

setIconImage(Toolkit.getDefaultToolkit().getImage(getClass().getResource("Your image address")));

edited Oct 19 '13 at 19:07

pb2q

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answered Oct 19 '13 at 18:46

user2895893

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score 4 · Answer 4 · answered Oct 16 '08 at 20:37

4

Or place the image in a location relative to a class and you don't need all that package/path info in the string itself.

com.xyz.SomeClassInThisPackage.class.getResource( "resources/camera.png" );

That way if you move the class to a different package, you dont have to find all the strings, you just move the class and its resources directory.

answered Oct 16 '08 at 20:37

John Gardner

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If you use a relative path and then create a subclass in a different package, that path will no longer be valid and your code will break. Using absolute paths prevents this (e.g. "/com/xyz/resources/camera.png") – hohonuuli Nov 02 '10 at 18:28

score 2 · Answer 5 · answered Oct 24 '12 at 01:05

    /** Creates new form Java Program1*/
    public Java Program1() 


    Image im = null;
    try {
    im = ImageIO.read(getClass().getResource("/image location"));
    } catch (IOException ex) {
    Logger.getLogger(chat.class.getName()).log(Level.SEVERE, null, ex);
    }
    setIconImage(im);

This is what I used in the GUI in netbeans and it worked perfectly

score 2 · Answer 6 · answered Jul 24 '16 at 00:48

You should define icons of various size, Windows and Linux distros like Ubuntu use different icons in Taskbar and Alt-Tab.

public static final URL ICON16 = HelperUi.class.getResource("/com/jsql/view/swing/resources/images/software/bug16.png");
public static final URL ICON32 = HelperUi.class.getResource("/com/jsql/view/swing/resources/images/software/bug32.png");
public static final URL ICON96 = HelperUi.class.getResource("/com/jsql/view/swing/resources/images/software/bug96.png");

List<Image> images = new ArrayList<>();
try {
    images.add(ImageIO.read(HelperUi.ICON96));
    images.add(ImageIO.read(HelperUi.ICON32));
    images.add(ImageIO.read(HelperUi.ICON16));
} catch (IOException e) {
    LOGGER.error(e, e);
}

// Define a small and large app icon
this.setIconImages(images);

score 1 · Answer 7 · answered Sep 21 '13 at 00:58

1

In a class that extends a javax.swing.JFrame use method setIconImage.

this.setIconImage(new ImageIcon(getClass().getResource("/resource/icon.png")).getImage());

answered Sep 21 '13 at 00:58

user2601995

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score 0 · Answer 8 · answered Jan 26 '19 at 01:23

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You can try this one, it works just fine :

`   ImageIcon icon = new ImageIcon(".//Ressources//User_50.png");
    this.setIconImage(icon.getImage());`

answered Jan 26 '19 at 01:23

Spicy strike

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score -1 · Answer 9 · answered Oct 21 '17 at 18:32

-1

inside frame constructor

try{    
       setIconImage(ImageIO.read(new File("./images/icon.png")));   
   }
catch (Exception ex){
       //do something
   }

answered Oct 21 '17 at 18:32

Alex S

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score -2 · Answer 10 · edited Jul 24 '16 at 01:33

-2

Example:

URL imageURL = this.getClass().getClassLoader().getResource("Gui/icon/report-go-icon.png");
ImageIcon iChing = new ImageIcon("C:\\Users\\RrezartP\\Documents\\NetBeansProjects\\Inventari\\src\\Gui\\icon\\report-go-icon.png");      
btnReport.setIcon(iChing); 
System.out.println(imageURL);

edited Jul 24 '16 at 01:33

ron190

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answered Sep 26 '14 at 09:01

Rrezart A. Prebreza

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How do I change the default application icon in Java?

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