Can't locate ImageIcon in JButton

Question

I am trying to assign a png type image to a JButton which is already created.

I've added a resource folder in the root folder of the project named images. I've tried to approach it with many ways as similar questions already exists but I can't seem to figure it out...

ImageIcon ico = new ImageIcon("/images/water.png");
bSquares[pos][line].setIcon(ico);

I've also tried many other paths like The source: ImageIcon ico = new ImageIcon("/TelikoDama/images/water.png");

I think it's the paths fault, or maybe my eclipse does not locate it? I don't know.

This is the NPE Im getting:

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
    at javax.swing.ImageIcon.<init>(ImageIcon.java:205)
    at cheeckers.gameUI.initializeGui(gameUI.java:112)
    at cheeckers.gameUI.<init>(gameUI.java:33)
    at cheeckers.gameUI$1.run(gameUI.java:226)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:312)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:745)
    at java.awt.EventQueue.access$300(EventQueue.java:103)
    at java.awt.EventQueue$3.run(EventQueue.java:706)
    at java.awt.EventQueue$3.run(EventQueue.java:704)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:715)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

EDIT I found a workaround, I've manually set the path of the folder in the .classpath:

<classpathentry kind="src" path="/src/images"/>

AND acessed the image like this:

Image ico = new ImageIcon(this.getClass().getResource("/images/water.png")).getImage();
                        bSquares[pos][line].setIcon(new ImageIcon(ico));

are you sure you added the resource folder to the class path? you may post a screenshot of the package explorer view .... — Ueli Hofstetter, May 23 '15 at 14:45
This has been asked many times before, for example, please see this [duplicate question](http://stackoverflow.com/questions/16631636/what-is-the-correct-path-to-display-an-imageicon-png-file-for-windows-7) which was used to close your question. And for more similar questions/answers, please check out this [search of this site](http://stackoverflow.com/search?q=%5Bjava%5D+imageicon+not+working). In fact, this second link is the most important since it will introduce you to the search capabilities of this site and help reduce unnecessary duplicate questions. — Hovercraft Full Of Eels, May 23 '15 at 15:03
That was me stating that I know that this subject has been asked tho I cant go out and figure it out, wasn't me? I know the search function of the site, this is not the first time I'm in a community like this — , May 23 '15 at 15:06
@JoeVox: Please have a look at [how to add images to Java Project](http://stackoverflow.com/a/9866659/1057230). Hope this helps somewhat in your endeavour :-) — nIcE cOw, May 23 '15 at 15:27

Akash Rajbanshi · Accepted Answer · 2015-05-23T15:00:56.477

2

You should probably use this code to get the image file for pretty much every components that you find in java UI:

JButton button = new JButton();
Image img= ImageIO.read(getClass().getResource("//images/water.png"));
button.setIcon(new ImageIcon(img));

edited May 23 '15 at 15:00

answered May 23 '15 at 14:52

Akash Rajbanshi

1,553
11
23

if I init like this I cant set it to an icon, even if I cast it – May 23 '15 at 14:55
@JoeVox: then you create an ImageIcon with the image using the correct constructor. The API will help you here. Please have a look at it. – Hovercraft Full Of Eels May 23 '15 at 15:00
I've made changes to the code...I think it should work now :) – Akash Rajbanshi May 23 '15 at 15:01
It resonds as: Unhandled type exception type IOException – May 23 '15 at 15:08
@JoeVox: http://stackoverflow.com/search?q=%5Bjava%5D+Unhandled+type+exception+type+IOException – Hovercraft Full Of Eels May 23 '15 at 15:09
you should surround the code in try catch block – Akash Rajbanshi May 23 '15 at 15:09

Can't locate ImageIcon in JButton

1 Answers1