import java.awt.Frame;
import java.awt.FileDialog;
import java.io.File;
import java.io.IOException;
import com.apple.mrj.MRJFileUtils;
public class ExecTest extends Frame
{

    public static void main(String[ ] args)
    {
        new ExecTest();
        System.exit(0);
    }

    public ExecTest()
    {
        String url = "http://developer.apple.com/java/";

        try
        {
            //Attempt to let MRJ do all the work for us.
                    MRJFileUtils.openURL(url);
            //If this was successful, then we need not go on.
                  return;
        }
        catch (IOException exc)
        {
            //This can occur if problems arise while attempting
            //to open the URL.
        }
        catch (NoSuchMethodError err)
        {
            //This can occur when earlier versions of MRJ are used which
           //do not support the openURL method.
            }
        catch (NoClassDefFoundError err)
        {
         //This can occur under runtime environments other than MRJ.
            }

        //If we make it here, MRJ was unsuccessful in opening the URL, and
       //we need to do it the hard way, using Runtime.exec.

        String browserName;

     //Set up a FileDialog for the user to locate the browser to use.
           FileDialog fileDialog = new java.awt.FileDialog(this);
        fileDialog.setMode(FileDialog.LOAD);
        fileDialog.setTitle("Choose the browser to use:");
        fileDialog.setVisible(true);

   //Retrieve the path information from the dialog and verify it.
     String resultPath = fileDialog.getDirectory();
     String resultFile = fileDialog.getFile();
     if(resultPath != null && resultPath.length()!= 0 &&            resultFile != null && resultFile.length() != 0)
        {
            File file = new File(resultPath + resultFile);
            if(file != null)
            {
                browserName = file.getPath();

                try
                {
 //Launch the browser and pass it the desired URL
                Runtime.getRuntime().exec(new String[] {browserName, url});
                }
                catch (IOException exc)
                {
                    exc.printStackTrace();
                }
            }
        }
    }
}