Re: browsing htm page inside JAR file

=?ISO-8859-1?Q?Arne_Vajh=F8j?= <>
Sat, 06 Sep 2008 21:18:01 -0400
Mike wrote:

On Sep 6, 6:37 pm, "John B. Matthews" <nos...@nospam.invalid> wrote:

In article <48c2de71$0$90273$>,
 Arne Vajh?j <> wrote:

Mike wrote:

I'm trying to access an ?html? page inside a JAR file. Then, I want to
display it using Java's Desktop.getDesktop().browse (URI). In other
words, I want to display it using the user's default browser. I was
able to get an URL a(jar:file...) and then convert it to an URI but
Java won't launch and open the default browser (Internet Explore
specifically) with the URI. Can someone show me Java code doing this?

A classloader can load content from inside a jar file.
A standard browser can not.
So it is not possible. You need to extract the file first.

Alternatively: you can display the html from the jar in a JTextPane or

OK. See my next comment.

JEditorPane; or you can read an absolute, browsable URL string from the
jar, construct the corresponding URI, and browse that.

That's the part that doesn't work. Can you show me Java code that does
that. I don't think is possible.

That is something completely different from using the system default

It is possible.

The following works.

C:\>jar tvf showhtml.jar
     57 Sat Sep 06 21:16:18 EDT 2008 META-INF/MANIFEST.MF
     49 Sat Sep 06 20:58:26 EDT 2008 september/text.html
    603 Sat Sep 06 21:15:48 EDT 2008 september/ShowHtml$1.class
   2250 Sat Sep 06 21:15:48 EDT 2008 september/ShowHtml.class

package september;

import java.awt.BorderLayout;

import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;

public class ShowHtml extends JFrame {
     private static String load(InputStream is) throws IOException {
         StringBuffer sb = new StringBuffer("");
         BufferedReader in = new BufferedReader(new InputStreamReader(is));
         String line;
         while((line = in.readLine()) != null) {
             sb.append(' ');
         return sb.toString();
     private JEditorPane html;
     public ShowHtml() {
         getContentPane().setLayout(new BorderLayout());
         html = new JEditorPane();
         try {
         } catch(IOException ex) {
             html.setText("**** Can not find HTML resource ****");
         getContentPane().add(html, BorderLayout.CENTER);
     public static void main(String[] args) {
         SwingUtilities.invokeLater(new Runnable() {
             public void run() {
                 JFrame f = new ShowHtml();


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