Printable View
The application has a help button, which displays a help screen but I also want it to link to my help online at BMI Help Page Contents.
Which is the best way of doing this, the code contained within the button so far isI want to add so that if they press help on the application that they can view the web page(s) as above.Code:if(evt.getSource()==cmdHelp);
optPane etc etc etc
Which is the best way?
Thanks in advance
Do you mean when they click on a link a web browser opens with the target url?
If so, they're a number of ways to do this, but i found that the simplest way is the following:
This creates a JLabel, which when clicked opens the users default web browser with a target url of "http://www.google.com". Additional features include the label being underlined and the label can have a different text string to the actual link, so in this case the label is "google", but the actual target is "http://www.google.com".Code:JLabel lblWebsiteLink = new JLabel("<html><u>" + "google" + "</u></html>");
lblWebsiteLink.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent arg0) {
Desktop desktop = Desktop.getDesktop();
try {
if (desktop.isSupported(Desktop.Action.BROWSE)) {
URI uri = new URI("http:www.google.com");
desktop.browse(uri);
}
} catch (URISyntaxException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
});
Hope this helps.
Ok thanks for that, can you explain it a little bit
such as what is the URI?
I assume I have to decalre this within the other variables?
I am working within netbeans so have just taken the following
I have several errors but i think that may be down to braces and brackets but currently the errors are sayingCode:Desktop desktop = Desktop.getDesktop();
try {
if (desktop.isSupported(Desktop.Action.BROWSE)) {
URI uri = new URI("http:www.google.com");
desktop.browse(uri);
}
} catch (URISyntaxException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
});
From these errors am I looking at a little more than brackets and braces?Code:cannot find symbol
browse(java.net.URI) in java.awt.Desktop cannot be applied to (URI)
cannot find symbol
symbol class URISyntaxException
cannot find symbol printStackTrace
exception java.io.IOException is never thrown in body of corresponding try statement.
Thanks in advance
Sorry, I forgot to show the imports.
Here it is again, just copy and paste this and run it.
Here is another example of how to create a link using the same method:Code:import java.awt.BorderLayout;
import java.awt.Desktop;
import java.awt.EventQueue;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
public class LinkExample extends JFrame {
private JPanel m_contentPane;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
LinkExample frame = new LinkExample();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public LinkExample() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(200, 100);
m_contentPane = new JPanel();
m_contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
m_contentPane.setLayout(new BorderLayout(0, 0));
setContentPane(m_contentPane);
{
final String strgLabel = "google";
final String strgTarget = "http://www.google.com";
//create underlined JLabel
JLabel lblWebsiteLink = new JLabel("<html><u>" + strgLabel + "</u></html>");
//add action listener to detect mouse click
lblWebsiteLink.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent arg0) {
Desktop desktop = Desktop.getDesktop();
try {
if (desktop.isSupported(Desktop.Action.BROWSE)) {
URI uri = new URI(strgTarget);
desktop.browse(uri);
}
} catch (URISyntaxException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
});
m_contentPane.add(lblWebsiteLink, BorderLayout.CENTER);
}
}
}
How to add hyperlink in JLabel - Stack Overflow
I would suggest changing the mouse cursor when the mouse hovers over the JLabel, however you'l have to find out how to do that yourself. (Just add 2 events, one to change the cursor, another to change it back)
Thanks for the help, I may be pushing my luck here but I am using netbeans edi so have my form all designed within netbeans.
I have the code in place but still have 1 error, the code causing the error is
From my understanding about this line which isnt much but is this something that I need, I have tried deleting it but nothing happens so do I need something else in its place?Code:m_contentPane.add(lblwebsiteLink, BorderLayout.CENTER);
The error at the side flags up the following.
http://www.ictfd.com/images/error.jpg
Thanks in advance.
:D
argh, netbeans..
All you need is the below imports..
and this JLabel..Code:import java.awt.BorderLayout;
import java.awt.Desktop;
import java.awt.EventQueue;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import javax.swing.JLabel;
Simply add the imports to the class, then add the JLabel.Code:final String strgLabel = "google";
final String strgTarget = "http://www.google.com";
//create underlined JLabel
JLabel lblWebsiteLink = new JLabel("<html><u>" + strgLabel + "</u></html>");
//add action listener to detect mouse click
lblWebsiteLink.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent arg0) {
Desktop desktop = Desktop.getDesktop();
try {
if (desktop.isSupported(Desktop.Action.BROWSE)) {
URI uri = new URI(strgTarget);
desktop.browse(uri);
}
} catch (URISyntaxException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
});
The line that was throwing an error added the label to the frame, duno why it gave an error.
If you have any more problems, screw you.
.. nah, keep asking haha.
LOL, if only life was that simple.Quote:
If you have any more problems, screw you.
Thanks for all your help
:D
The code that I pasted in
Has the system thinking about doing something but nothing does happen, everything validates fine, I get an icon at the side ofCode:final String strgLabel = "BMI Online Help";
final String strgTarget = "http://www.ictfd.com/bmiassess3/helpmovies.html";
//create underlined JLabel
JLabel lblWebsiteLink = new JLabel("<html><u>" + strgLabel + "</u></html>");
//add action listener to detect mouse click
lblWebsiteLink.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent arg0) {
Desktop desktop = Desktop.getDesktop();
try {
if (desktop.isSupported(Desktop.Action.BROWSE)) {
URI uri = new URI(strgTarget);
desktop.browse(uri);
}
} catch (URISyntaxException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
});
I tried it but still nothing, I have to admit that I lost with this code but as I say the processor kicks in when I click on the button but it doesnt open a browser window????Code:Add @override annotation
Thanks in advance
So it has no errors but when you click on the link nothing happens, no exceptions or anything?
Add some prints above and beneath the desktop.browse(uri) line.
If these appear fine.. I don't know whats wrong.
The only thing (i guess) your lost with is the desktop object, just google it, I have no idea what it is either.. but i don't need to know, for me it works :P
If your lost with anything else, you should try some other smaller projects, then come back to this one.
Hope this helps.
Well thanks for your help, I am lost with more than the desktop but I will pick it up somewhere along the line.
I did as you suggested and put a few println in, I put 1 directly under the line with the url in, that worked
I put 2 others where you suggested, neither worked.
Any suggestions?
and no there are no errors at all apart from where it asks me to
Add @override annotation
What OS are you running?
Desktop may not be supported, thats why it is neither throwing an exception or opening an browser.
As taken from:
How to Integrate with the Desktop Class (The Java™ Tutorials > Creating a GUI with JFC/Swing > Using Other Swing Features)
Add an else to the if statement, if the else is triggered (you will now if you add some prints inside it) then Desktop is not supported on your OS.Quote:
On the Solaris Operating System and the Linux platform, this API is dependent on Gnome libraries. If those libraries are unavailable, this method will return false.
Running Vista
Through your comments abt os I decided to test some code I have just managed to find, my desktop runs XP and running the following code worked great.
Code:import javax.swing.*;
import javax.swing.event.*;
import java.io.*;
public class hyperlink extends JFrame
{
public static void main(String arg[])throws Exception
{
new hyperlink();
}
public hyperlink() throws Exception
{
String s = "http://www.ictfd.com/bmiassess3/helpmovies.html";
JEditorPane pane = new JEditorPane(s);;
pane.setEditable(false);
final JEditorPane finalpane = pane;
pane.addHyperlinkListener(new HyperlinkListener()
{
public void hyperlinkUpdate(HyperlinkEvent r)
{
try
{
if(r.getEventType() == HyperlinkEvent.EventType.ACTIVATED)
finalpane.setPage(r.getURL());
}catch(Exception e)
{}
}
});
setContentPane(new JScrollPane(pane));
setSize(800,600);
setVisible(true);
}
}
However when I tried to run it on vista that has same jdk etc etc I got bucket loads of errors.
The XP system opened the url within java.
Can someone tell me why this would be?
:confused::confused::confused:
vista sucks?... no idea.
Can you recheck whether you are using the same version of jdk in both vista and XP?
Because version might make a difference at times.
the jdk on the xp pc is .1 off the version on vista,
when run java -version
javac -version same
vista 1.06.0.07
xp 1.06.0.06