I am encountering a problem loading an HTML file in an editor pane and displaying it. The code I am using is:
window_pane = new JEditorPane("file:///assets/www/index.html");
But that just gave some errors:
Exception in thread "main" java.io.FileNotFoundException: \assets\www\index.html (Het systeem kan het opgegeven pad niet vinden)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(Unknown Source)
at java.io.FileInputStream.<init>(Unknown Source)
at sun.net.www.protocol.file.FileURLConnection.connect(Unknown Source)
at sun.net.www.protocol.file.FileURLConnection.getInputStream(Unknown Source)
at javax.swing.JEditorPane.getStream(Unknown Source)
at javax.swing.JEditorPane.setPage(Unknown Source)
at javax.swing.JEditorPane.setPage(Unknown Source)
at javax.swing.JEditorPane.<init>(Unknown Source)
at nl.xedus.battlex.java.WebBrowser.<init>(WebBrowser.java:33)
at nl.xedus.battlex.java.WebBrowser.main(WebBrowser.java:72)
ScreenShot:

Can anybody help please?
That looks like a relative path in your file URL. You need to use an absolute path. For resources bundled with your application you can get a URL like this:
This assumes that there is an HTML file named ‘foobar.html’ at the root of your classpath. Extend the pseudocode to serve your needs.