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ImageJ is an open source Java image processing program inspired by NIH Image for the Macintosh.

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package ij.plugin;
import ij.IJ;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;

/**
 * This plugin implements the File/Import/URL command and the commands in the Help menu that 
 * open web pages. It is based on Eric Albert's cross-platform (Windows, Mac OS X and Unix) 
 * BrowserLauncher class.
 * 

* BrowserLauncher is a class that provides one static method, openURL, which opens the default * web browser for the current user of the system to the given URL. It may support other * protocols depending on the system -- mailto, ftp, etc. -- but that has not been rigorously * tested and is not guaranteed to work. *

* Yes, this is platform-specific code, and yes, it may rely on classes on certain platforms * that are not part of the standard JDK. What we're trying to do, though, is to take something * that's frequently desirable but inherently platform-specific -- opening a default browser -- * and allow programmers (you, for example) to do so without worrying about dropping into native * code or doing anything else similarly evil. *

* Anyway, this code is completely in Java and will run on all JDK 1.1-compliant systems without * modification or a need for additional libraries. All classes that are required on certain * platforms to allow this to run are dynamically loaded at runtime via reflection and, if not * found, will not cause this to do anything other than returning an error when opening the * browser. *

* This code is Copyright 1999-2001 by Eric Albert ([email protected]) and may be * redistributed or modified in any form without restrictions as long as the portion of this * comment from this paragraph through the end of the comment is not removed. The author * requests that he be notified of any application, applet, or other binary that makes use of * this code, but that's more out of curiosity than anything and is not required. This software * includes no warranty. The author is not repsonsible for any loss of data or functionality * or any adverse or unexpected effects of using this software. *

* Credits: *
Steven Spencer, JavaWorld magazine (Java Tip 66) *
Thanks also to Ron B. Yeh, Eric Shapiro, Ben Engber, Paul Teitlebaum, Andrea Cantatore, * Larry Barowski, Trevor Bedzek, Frank Miedrich, and Ron Rabakukk * * @author Eric Albert ([email protected]) * @version 1.4b1 (Released June 20, 2001) */ public class BrowserLauncher implements PlugIn { /** The com.apple.mrj.MRJFileUtils class */ private static Class mrjFileUtilsClass; /** The openURL method of com.apple.mrj.MRJFileUtils */ private static Method openURL; private static boolean error; /** Opens the specified URL (default is the ImageJ home page). */ public void run(String theURL) { if (error) return; if (theURL==null || theURL.equals("")) theURL = IJ.URL; try {openURL(theURL);} catch (IOException e) {} } /** * Attempts to open the default web browser to the given URL. * @param url The URL to open * @throws IOException If the web browser could not be located or does not run */ public static void openURL(String url) throws IOException { String errorMessage = ""; if (IJ.isMacOSX()) IJ.runMacro("exec('open', getArgument())",url); else if (IJ.isWindows()) { String cmd = "rundll32 url.dll,FileProtocolHandler " + url; if (System.getProperty("os.name").startsWith("Windows 2000")) cmd = "rundll32 shell32.dll,ShellExec_RunDLL " + url; Process process = Runtime.getRuntime().exec(cmd); // This avoids a memory leak on some versions of Java on Windows. // That's hinted at in . try { process.waitFor(); process.exitValue(); } catch (InterruptedException ie) { throw new IOException("InterruptedException while launching browser: " + ie.getMessage()); } } else { // Assume Linux or Unix // Based on BareBonesBrowserLaunch (http://www.centerkey.com/java/browser/) // The utility 'xdg-open' launches the URL in the user's preferred browser, // therefore we try to use it first, before trying to discover other browsers. String[] browsers = {"xdg-open", "netscape", "firefox", "konqueror", "mozilla", "opera", "epiphany", "lynx" }; String browserName = null; try { for (int count=0; count





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