Re: File creation Problem

Padmanabhan,

Applets cannot write files, expect to the host that they came back from.
And you have to identify the host exactly the same way that the applet was
loaded from.

Nick




"Padmanabhan R (RBIN/ACF)" <Padmanabhan.R@in.bosch.com>@midrange.com on
05/17/2000 11:29:40 AM

Please respond to JAVA400-L@midrange.com

Sent by:  owner-java400-l@midrange.com


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cc:

Subject:  File creation Problem


Hello ,

          I tried to run the following code , but it is throwing out
the security exception.

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

public class SimpleSaver extends Applet
{

     public void init()
     {
          Button b = new Button("Beans Book");
          b.setFont(new Font("System", Font.BOLD, 36));
          add(b);
          Saver f = new Saver(b);

     }


class Saver
{

public Saver(Button b){


     try{

               FileOutputStream f = new
FileOutputStream("Sav.tmp");
               ObjectOutput s = new ObjectOutputStream(f);
               s.writeObject(b);
               s.flush();
               }catch(Exception e)
                {
                    e.printStackTrace();
                    System.out.println(e);
               }


                    }

  }

}

Exception

E:\jdk1.2\bin\appletviewer.exe     SimpleApplet.html
Working Directory - E:\samples\
Class Path - E:\samples\;
;.;d:\Kawa\classes.zip;e:\jdk1.2\lib\tools.jar;e:\jdk1.2\jre\lib\rt.jar;E:
\j
dk1.2\lib\dt.jar;E:\jdk1.2\jre\lib\jaws.jar;E:\jdk1.2\jre\lib\i18n.jar;E:
\jd
k1.2\lib\servlet.jar;E:\jdk1.2\lib\as400Driver.jar;i:
\proddata\http\public\j
t400\utilities\;i:\proddata\http\public\jt400\lib\jt400.jar
java.security.AccessControlException: access denied (java.io.FilePermission
Sav.tmp write)

     at java.security.AccessControlContext.checkPermission(Compiled Code)

     at java.security.AccessController.checkPermission(Compiled Code)

     at java.lang.SecurityManager.checkPermission(Compiled Code)

     at java.lang.SecurityManager.checkWrite(SecurityManager.java:946)

     at java.io.FileOutputStream.<init>(FileOutputStream.java:96)

     at java.io.FileOutputStream.<init>(FileOutputStream.java:62)

     at SimpleSaver$Saver.<init>(SimpleSaver.java:26)

     at SimpleSaver.init(SimpleSaver.java:13)

     at sun.applet.AppletPanel.run(Compiled Code)

     at java.lang.Thread.run(Thread.java:479)

java.security.AccessControlException: access denied (java.io.FilePermission
Sav.tmp write)

Process Exit...
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