BareBonesBrowserLaunch.java

package se.kth.karamel.webservice;

import java.util.Arrays;
import javax.swing.JOptionPane;

/**
 * <b>Bare Bones Browser Launch for Java</b><br>
 * Utility class to open a web page from a Swing application in the user's default browser.<br>
 * Supports: Mac OS X, GNU/Linux, Unix, Windows XP/Vista/7<br>
 * Example Usage:<code><br>    
 *    String url = "http://www.google.com/";<br>    
 *    BareBonesBrowserLaunch.openURL(url);<br></code> Latest Version: <a
 * href="http://www.centerkey.com/java/browser/">www.centerkey.com/java/browser</a><br>
 * Author: Dem Pilafian<br>
 * Public Domain Software -- Free to Use as You Like
 *
 * @version 3.1, June 6, 2010
 */
public class BareBonesBrowserLaunch {

  static final String[] browsers = {"google-chrome", "firefox", "opera",
    "epiphany", "konqueror", "conkeror", "midori", "kazehakase", "mozilla"};
  static final String errMsg = "Error attempting to launch web browser. Open a browser and enter the "
      + "URL: http://localhost:9090/index.html ";

  /**
   * Opens the specified web page in the user's default browser
   *
   * @param url A web address (URL) of a web page (ex: "http://www.google.com/")
   */
  public static void openURL(String url) {
    try {  //attempt to use Desktop library from JDK 1.6+
      Class<?> d = Class.forName("java.awt.Desktop");
      d.getDeclaredMethod("browse", new Class[]{java.net.URI.class}).invoke(
          d.getDeclaredMethod("getDesktop").invoke(null),
          new Object[]{java.net.URI.create(url)});
      //above code mimicks:  java.awt.Desktop.getDesktop().browse()
    } catch (Exception ignore) {  //library not available or failed
      String osName = System.getProperty("os.name");
      try {
        if (osName.startsWith("Mac OS")) {
          Class.forName("com.apple.eio.FileManager").getDeclaredMethod(
              "openURL", new Class[]{String.class}).invoke(null,
                  new Object[]{url});
        } else if (osName.startsWith("Windows")) {
          Runtime.getRuntime().exec(
              "rundll32 url.dll,FileProtocolHandler " + url);
        } else { //assume Unix or Linux
          String browser = null;
          for (String b : browsers) {
            if (browser == null && Runtime.getRuntime().exec(new String[]{"which", b}).getInputStream().read() != -1) {
              Runtime.getRuntime().exec(new String[]{browser = b, url});
            }
          }
          if (browser == null) {
            throw new Exception(Arrays.toString(browsers));
          }
        }
      } catch (Exception e) {
        JOptionPane.showMessageDialog(null, errMsg + "\n" + e.toString());
      }
    }
  }

}