Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Simple SQL Applet

Posted on 2002-05-12
4
Medium Priority
?
431 Views
Last Modified: 2013-12-29
Hey all, I'm trying to write my first SQL applet which connects to an Access database.  I'm just trying to get the framework of this to work so I can experiement with it later.  

I am using an ODBC bridge driver.  
Here is my error:

java.security.AccessControlException: access denied (java.lang.RuntimePermissi
 accessClassInPackage.sun.jdbc.odbc)
        at java.security.AccessControlContext.checkPermission(AccessControlCon
xt.java:270)
        at java.security.AccessController.checkPermission(AccessController.jav
401)
        at java.lang.SecurityManager.checkPermission(SecurityManager.java:542)
        at java.lang.SecurityManager.checkPackageAccess(SecurityManager.java:1
3)
        at sun.applet.AppletSecurity.checkPackageAccess(AppletSecurity.java:16

        at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:109)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:262)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:322)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:130)
        at SqlTest.init(SqlTest.java:39)
        at sun.applet.AppletPanel.run(AppletPanel.java:341)
        at java.lang.Thread.run(Thread.java:536)



Here is my Applet: VERY SIMPLE -- Dont laugh:


/*
 * @(#)SqlTest.java 1.0 02/04/10
 *
 * You can modify the template of this file in the
 * directory ..\JCreator\Templates\Template_2\Project_Name.java
 *
 * You can also create your own project template by making a new
 * folder in the directory ..\JCreator\Template\. Use the other
 * templates as examples.
 *
 */


import java.awt.*;
import java.applet.*;
import java.sql.*;
import javax.swing.*;


public class SqlTest extends JApplet {
     
     String fName = new String();
     String lName = new String();
     
     public void init() {
         
          String url = "jdbc:odbc:dsnTest";
          String sqlString = "Select * Customer";
         
         
          ResultSet rs;
          Statement strSQL;
         
          Connection con;
         
          try
          {
               //create instance of the driver
               Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
               
               //creat the connection
               con = DriverManager.getConnection(url);
               
               //make sql statment
               strSQL = con.createStatement();
               rs = strSQL.executeQuery(sqlString);
               
               
               while(rs.next())
               {
                   
                    fName = rs.getString("First Name");
                    lName = rs.getString("Last Name");
                    if(fName == null)
                         System.out.println("NULL!!");
                    if(lName == null)
                         System.out.println("Last name is null");
               }
                   
         
                             
          }
          //catch all exceptions
          catch(Exception e)
          {
               e.printStackTrace();
               return;
          }

         
     }

     public void paint(Graphics g)
     {
         
          g.drawString("First Name: " + fName, 50, 60);
         
         
     }
}
0
Comment
Question by:smartin7
  • 3
4 Comments
 
LVL 35

Expert Comment

by:girionis
ID: 7005526
 The exception you are getting is thrown by the applet security manager and it does not have to do with errors in your code. Bare in mind that applets can only communicate with the database server that resides on the same machine where Applet was downloaded from. You cannot connect to any other server without first signing the Applet with a digital certificate.

  Hope it helps.
0
 
LVL 35

Accepted Solution

by:
girionis earned 200 total points
ID: 7005530
0
 

Author Comment

by:smartin7
ID: 7006483
Girionis,
   Thanks for the information, thats exactly what I need.  It appears I need to create a policy file.  This is a great link.  Thanks again!

-Scott
0
 
LVL 35

Expert Comment

by:girionis
ID: 7007048
 No problem. Thank you for the points :-)
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

After being asked a question last year, I went into one of my moods where I did some research and code just for the fun and learning of it all.  Subsequently, from this journey, I put together this article on "Range Searching Using Visual Basic.NET …
By the end of 1980s, object oriented programming using languages like C++, Simula69 and ObjectPascal gained momentum. It looked like programmers finally found the perfect language. C++ successfully combined the object oriented principles of Simula w…
Viewers will learn about the different types of variables in Java and how to declare them. Decide the type of variable desired: Put the keyword corresponding to the type of variable in front of the variable name: Use the equal sign to assign a v…
Viewers will learn about if statements in Java and their use The if statement: The condition required to create an if statement: Variations of if statements: An example using if statements:
Suggested Courses

971 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question