Re: [Swing] Is it possibl

  To: comp.lang.java.gui
See below - works with older Java versions.

public class BrowserControl {
    // Used to identify the windows platform.
    private static final String WIN_ID = "Windows";
    // Used to identify the mac platform.
    private static final String MAC_ID = "Mac";
    // The default system browser under windows.
    private static final String WIN_PATH = "rundll32";
    // The flag to display a url.
    private static final String WIN_FLAG = "url.dll,FileProtocolHandler";
    // The default system browser under mac.
    private static final String MAC_PATH = "open";
    // The default browser under unix.
    private static final String UNIX_PATH = "netscape";
    // The flag to display a url.
    private static final String UNIX_FLAG = "-remote openURL";

     /**
      * Display a file in the system browser. If you want to display a
      * file, you must include the absolute path name.
      *
      * @param url the file's url (the url must start with either "http://"
      * or
      * "file://").
      */
     public static void displayURL(String url) {
         boolean windows = isWindowsPlatform();
         boolean mac = isMacPlatform();
         String cmd = null;
         try {
             if (windows) {
                 // cmd = 'rundll32 url.dll,FileProtocolHandler http://...'
                 cmd = WIN_PATH + ' ' + WIN_FLAG + ' ' + url;
                 Runtime.getRuntime().exec(cmd);
             } else if (mac) {
                 cmd = MAC_PATH + ' ' + url;
                 Runtime.getRuntime().exec(cmd);
             } else {
                 // Under Unix, Netscape has to be running for the "-remote"
                 // command to work. So, we try sending the command and
                 // check for an exit value. If the exit command is 0,
                 // it worked, otherwise we need to start the browser.
                 // cmd = 'netscape -remote openURL(http://www.javaworld.com)'
                 cmd = UNIX_PATH + ' ' + UNIX_FLAG + '(' + url + ')';
                 Process p = Runtime.getRuntime().exec(cmd);
                 try {
                     // wait for exit code -- if it's 0, command worked,
                     // otherwise we need to start the browser up.
                     int exitCode = p.waitFor();
                     if (exitCode != 0) {
                         // Command failed, start up the browser
                         // cmd = 'netscape http://www.javaworld.com'
                         cmd = UNIX_PATH + ' ' + url;
                         Runtime.getRuntime().exec(cmd);
                     }
                 } catch (InterruptedException x) {
                     System.err.println("Error bringing up browser, cmd='" + cmd
+ '\'');
                     System.err.println("Caught: " + x);
                 }
             }
         } catch (IOException x) {
             // couldn't exec browser
             System.err.println("Could not invoke browser, command=" + cmd);
             System.err.println("Caught: " + x);
         }
     }

     private static boolean isMacPlatform() {
         String os = System.getProperty("os.name");
         return os != null && os.startsWith(MAC_ID);
     }

     /**
      * Try to determine whether this application is running under Windows
      * or some other platform by examing the "os.name" property.
      *
      * @return true if this application is running under a Windows OS
      */
     public static boolean isWindowsPlatform() {
         String os = System.getProperty("os.name");
         return os != null && os.startsWith(WIN_ID);
     }

     /**
      * Simple example.
      */
     public static void main(String[] args) {
         displayURL("http://www.javaworld.com");
     }

}

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