/**
  * By default, this applet raises a security exception, unless
  *  you configure your policy to allow applets from its location
  *  to write to the file "writetest".

  <applet code=WriteFile.class width=700 height=150>
  </applet>  
*/

import java.awt.*;
import java.io.*;
//import java.lang.*;
import java.applet.*;
import java.util.Date;
import java.security.*;

public class WriteFile extends Applet {
    String myFile = "D:\\Testing\\writetest.txt";    // The file to write
    File f = new File(myFile);
    DataOutputStream dos;

    String message = "";

  public void init() {
    String osname = System.getProperty("os.name");
    System.out.println("os.name is " + osname);
    System.out.println("Java version is " + System.getProperty("java.version"));
    // Following added for tests with IE7 - Still does not allow wildcards in .java.policy file
/*
grant codeBase "file:/D:/JavaDevelopment/Testing/WriteFile/-" {
/*  permission java.io.FilePermission "D:/Testing/writetest.txt", "read, write";  IE7 works*/ /*
  permission java.io.FilePermission "D:/Testing/*", "read, write";   // IE7 fails
};
*/
    AccessController.doPrivileged(new PrivilegedAction() {
        public Object run() {
            System.out.println("Starting PrivilegedAction");
         	try {
           	  dos = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(myFile),128));
         	  dos.writeBytes("Cats can hypnotize you when you least expect it\n" + new Date() + "\n");
         	  dos.flush();
              dos.close();
         	  message = "Successfully wrote to the file named " + myFile 
                                  + " -- go take a look at it!";
         	}
         	catch (SecurityException e) {
         	  message = "writeFile: ex: " + e;
              e.printStackTrace();
            }
         	catch (IOException ioe) {
         		message = "writeFile: caught i/o exception " + ioe;
              ioe.printStackTrace();
            }
            repaint();              // go show message
            return null;
        }
    });
  } // end init()

 public void paint(Graphics g) {
   g.drawString(message, 10, 10); // show the message
/*
	try {
  	  dos = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(myFile),128));
	  dos.writeBytes("Cats can hypnotize you when you least expect it\n" + new Date() + "\n");
	  dos.flush();
	  g.drawString("Successfully wrote to the file named " + myFile + " -- go take a look at it!", 10, 10);
	}
	catch (SecurityException e) {
	  g.drawString("writeFile: ex: " + e, 10, 10);
   }
	catch (IOException ioe) {
		g.drawString("writeFile: caught i/o exception", 10, 10);
   }
*/
 }
}