Oracle Stored Procedure in Java

Question

I am try to write a stored procedure which is to written using java and then loaded into oracle. What this stored procedure does is insert some values into an oracle table. Here is a piece of code that i have tested before doing the whole real thing. But the stored procedure compiled, loaded into oracle without problems. Once the stored procedure is executed, it does nothing.
Heres the code -
import java.sql.*;
import oracle.jdbc.driver.*;
public class test{
public static void insert()
Connection cn = null;
PreparedStatement ps = null;
String sql ="INSERT INTO Testing.test VALUES ('JEFF')";
try{
cn = new OracleDriver().defaultConnection();
ps.execute(sql);
ps.close();
cn.commit();
cn.close();
}catch(Exception e){
Here is the table structure in Oracle 9i -
Name Null? Type
USER NOT NULL CHAR(12)
Hope u guys can help me out.

Answer 1

Once the stored procedure is executed, it does nothing.Actually it DOES do something - it throws a NullPointerException. You have a catch block with nothing in it, so your code doesn't report the problem.
How do you execute this? Is there another class that calls it?
This doesn't use a stored procedure. You need a java.sql.CallableStatement for that.
Where did you get this code? Does it even compile?
When I tried to create a table named "user" in my Oracle instance it complained. I made it "application_user" instead. How did you ever try this problem?
I think you need a JDBC tutorial:
http://java.sun.com/docs/books/tutorial/jdbc/
Here's how I'd write it:
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
public class OracleInsertTest
    public static final String DRIVER   = "oracle.jdbc.driver.OracleDriver";
    // Substitute your host, database, username, and password
    public static final String DATABASE = "jdbc:oracle:thin:@host:1521:database";
    public static final String USERNAME = "username";
    public static final String PASSWORD = "password";
    public static void main(String [] args)
        if (args.length > 0)
            try
                Class.forName(DRIVER);
                Connection connection = DriverManager.getConnection(DATABASE, USERNAME, PASSWORD);
                String sql = "INSERT INTO application_user(name) VALUES(?)";
                PreparedStatement statement = connection.prepareStatement(sql);
                statement.setString(1, args[0]);
                int numRowsInserted = statement.executeUpdate();
                System.out.println("# rows inserted: " + numRowsInserted);
                statement.close();
                connection.close();
            catch (Exception e)
                // Empty catch blocks are usually a very bad idea.
                e.printStackTrace();
        else
            System.err.println("No command line argument given");
}MOD