how to activate html-links in a JEditor pane

[Andy Jung]

Hi,

loading and displaying a html-file in a JEditorPane works fine (see code snippet provided),
except for the functionality of html links.

Do I have to provide this functionality separately in a programmatical way, and if yes, how is it accomplished?

   
                // HTML-file to be loaded in this dialog:
                final File aboutFile = new File("about.html");
                try {
                    final JEditorPane about
                            = new JEditorPane(aboutFile.toURI().toURL());

                    JOptionPane.showMessageDialog(
                            URLyBirdClientWindow.this,
                            about,
                            "About",
                            JOptionPane.PLAIN_MESSAGE);

[Maneesh Godbole]

The API for JEditorPane has a code snippet on using HyperlinkListener

[Andy Jung]

thanks for the hint, that should do

[Andy Jung]

common links work fine, but having a link referring to an email-adress like this:

<a href="mailto:[e-mail]"/>

results in the following exception:
java.net.UnknownServiceException: protocol doesn't support input

How can I achieve, that a JEditorPane invokes the default email program if clicking on that link?

[Rob Spoor]

Andy Jung wrote:results in the following exception:
java.net.UnknownServiceException: protocol doesn't support input

When? From your own code or from the API's code? Posting the stack trace may help.

[Andy Jung]

it comes from Sun's API. Complete stack trace is:

java.net.UnknownServiceException: protocol doesn't support input
        at java.net.URLConnection.getInputStream(URLConnection.java:779)
        at javax.swing.JEditorPane.getStream(JEditorPane.java:812)
        at javax.swing.JEditorPane.setPage(JEditorPane.java:418)
        at suncertify.gui.dialogs.HelpDialog$1.hyperlinkUpdate(HelpDialog.java:83)
        at javax.swing.JEditorPane.fireHyperlinkUpdate(JEditorPane.java:327)
        at javax.swing.text.html.HTMLEditorKit$LinkController.activateLink(HTMLEditorKit.java:828)
        at javax.swing.text.html.HTMLEditorKit$LinkController.mouseClicked(HTMLEditorKit.java:638)
        at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:253)
        at java.awt.Component.processMouseEvent(Component.java:6041)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3260)
        at java.awt.Component.processEvent(Component.java:5803)
        at java.awt.Container.processEvent(Container.java:2058)
        at java.awt.Component.dispatchEventImpl(Component.java:4410)
        at java.awt.Container.dispatchEventImpl(Container.java:2116)
        at java.awt.Component.dispatchEvent(Component.java:4240)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3995)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
        at java.awt.Container.dispatchEventImpl(Container.java:2102)
        at java.awt.Window.dispatchEventImpl(Window.java:2429)
        at java.awt.Component.dispatchEvent(Component.java:4240)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)

I used exactly the code snippet from the JEditorPane-API Maneesh suggested.

[Rob Spoor]

The setPage method does not work for mailto URLs.

In the HyperlinkListener get the protocol of the URL. If that is "mailto" don't call setPage but use Desktop.mail(URL) instead.

[Andy Jung]

Rob Prime wrote:
In the HyperlinkListener get the protocol of the URL. If that is "mailto" don't call setPage but use Desktop.mail(URL) instead.

Thanks, that works ! A very nice new 1.6-feature I didn't know before.

[Andy Jung]

is there any API-constant specifiying the protocol "mailto" for html-links, so I don't have to hard-code this (see following code-snippet)?

if ("mailto".equals(e.getURL().getProtocol())) { ...