/**
  * By default, this applet raises a security exception.
  *
  *  If you sign this applet, it can run and write a file
  *  named "tmpfoo" in your working directory. 
  * 
  * Based on http://java.sun.com/security/signExample/writeFile.java
  */

import java.applet.Applet;
import java.awt.*;
import java.io.*;

// To compile, add java40.jar to the class path. 
import netscape.security.PrivilegeManager;

public class WriteFile extends Applet {

    public void paint(Graphics g) {

        String slash = System.getProperty("file.separator");

        try {
            // Support added for Netscape's Capabilities API. 
            if (SecurityContext.isCapableOf("UniversalFileAccess")) {
                PrivilegeManager.enablePrivilege("UniversalFileAccess");
            }

            String userdir = System.getProperty("user.dir");
            g.drawString("Successfully read user.dir ..." + userdir, 10, 10);

            String fileName = userdir + slash + "tmpfoo";

            DataOutputStream dos;
            dos = new DataOutputStream(new FileOutputStream(fileName));
            dos.writeChars("This was written by a trusted applet.\n");
            dos.close();
            g.drawString("Successfully wrote to file " + fileName, 10, 30);
        }

        catch (Exception e) {
            g.drawString("WriteFile: caught " + e, 10, 10);
        }
    }
}