Coonection Problem in java (oracle)

Posted on 2009-07-08
Last Modified: 2013-11-23
Hi ,

i am using 2 java class ,

1st class  program

DBConn dba=new DBConn();
Connection con=null;

String query="insert into gen_info(EMP_NAME,EMP_ID,TECH) "+ "values(?,?,?)";
//Statement st=con.createStatement();
PreparedStatement psmnt=null;

boolean s = psmnt.execute();
if (s)
      System.out.println("Succesfully inserted");
      System.out.println("Cant Insert");

its call DBConn class , thats have connection coding
                              // System.out.println("Failed to load isqlPlus driver.");
                              //DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());

                        catch (Exception ae) {

                        try {

                              String url1 = System.getProperty("JDBC_URL");
                              if (url1 != null)
                                    url = url1;
                              PreparedStatement psmnt=null;
                              con = DriverManager.getConnection(url,
                                          "system", "tspl");
                              psmnt = con.prepareStatement(query);
                        } catch (Exception e) {
                  } catch (Exception e) {

afterfinish this its return back to 1st  preparestmaent is null its throw the null pointer excetion
kindly help me to reslove this !!

Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2

Expert Comment

ID: 24807142

Did you remember to make objects of the connections? ( = new ...())
LVL 20

Author Comment

by:Sathish David Kumar N
ID: 24810959
I am using 2 class sirtam so preparestatement variable is null when the nrturn back excute the query .
LVL 20

Accepted Solution

Sathish David  Kumar N earned 0 total points
ID: 24924004
prepareStament is local to that class so thats value is null so its say null ponter exception

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

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

INTRODUCTION Working with files is a moderately common task in Java.  For most projects hard coding the file names, using parameters in configuration files, or using command-line arguments is sufficient.   However, when your application has vi…
Introduction Java can be integrated with native programs using an interface called JNI(Java Native Interface). Native programs are programs which can directly run on the processor. JNI is simply a naming and calling convention so that the JVM (Java…
Viewers learn about the third conditional statement “else if” and use it in an example program. Then additional information about conditional statements is provided, covering the topic thoroughly. Viewers learn about the third conditional statement …
Viewers learn how to read error messages and identify possible mistakes that could cause hours of frustration. Coding is as much about debugging your code as it is about writing it. Define Error Message: Line Numbers: Type of Error: Break Down…

630 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