Help with the connection statement

Question

Hi,
I want the initialization of the database i.e.,
Class.forName(DEFAULT_DRIVER);
Connection connection = DriverManager.getConnection(DEFAULT_URL);
To be done in one method (in a class) and other methods should use this connection object inside.Is it possible to do something like this.Hope that you got my question correctly.
A reply would be appreciated.
Thanks
AS

Answer 1

smartnash, looks like you're going to have your whole
app written for you on this forum, one question at a
time.
This is pretty basic Java. Have you read about
scope?
public static Connection initDatabase()     
try
Class.forName(DEFAULT_DRIVER);               
System.out.println("Driver loaded
loaded successfully");               
Connection connection =
ction = DriverManager.getConnection(DEFAULT_URL);     
System.out.println("Got a connection to the
to the database");           
catch(Exception e)
e.printStackTrace();     
return connection;     
}Look at what you've done - you've declared a local
variable named connection inside the try block. The
instant you leave the try block connection is out of
scope. The compiler is complaining because you're
trying to return a variable that is no longer in
scope.
Read the messages that the compiler and runtime are
giving you and think about them.
Your solution, since this is a static method, is to
declare a private static variable connection. Use
this method to initialize and return THAT:
public class ConnectionManager
private static Connection connection;
public static Connection initDatabase()     
if (ConnectionManager.connection == null)
try
Class.forName(DEFAULT_DRIVER);               
System.out.println("Driver loaded
iver loaded successfully");               
ConnectionManager.connection =
onnection =
DriverManager.getConnection(DEFAULT_URL);     
System.out.println("Got a connection to
nnection to the database");           
catch(Exception e)
e.printStackTrace();     
ConnectionManager.connection = null;
return ConnectionManager.connection;     
}You'll want another static method to close your
connections, too.
Sorry, I didn't compile or test this, but you get the
idea. - MOD
Hi,
Thanks for the information.Where else do you think I can et information other than the forums and online?.Do you think there is something wrong in me asking the questions.?
I dont know whether you will get time to reply to this Q,Will keep on posting.
As