Have doubt?? Can any one clear it

Question

Hi guys i have doubt.It will be nice if
some one clears it
around.
Question:
when making a connection to the database using
ConnectionPooling should we close
connection,statementobject and resultSet.
like this(this is the way i am doing too.)
try
---opening a connection,rs,stmt
other code
}catch() {
finally{
if(rs!=null)
rs.close();
if(stmt!=null)
stmt.close();
if(conn!=null)
conn.close()
Doubt:
Is it not Sufficient to close the connection.Can any one
explain in detail why resultset and statment should be
closed.

Answer 1

From my understanding, close releases resources on the object, so I would suspect that each DB driver implements their resources independently. It would be DB driver specific if closing the connection would cascade the resource cleanup to any objects that were created within that connection. I perform the same logic you do at the end of my DB calls. I have each in a try/catch since close throws SQLException, and I would prefer if each got the chance to execute. I don't do anything with an exception if close fails, because there really isn't anything you can do.
try {
      ...something to DB
}finally
   try {
       if(rs != null )
          rs.close();
   }catch(Exception e){}
   try {
       if(cursor != null )
          cursor.close();
   }catch(Exception e){}
   try {
       if(conn != null )
          conn.close();
   }catch(Exception e){}
}