Gregory D. Speegle's JDBC: Practical Guide for Java Programmers (The Practical PDF

By Gregory D. Speegle

JDBC: sensible advisor for Java Programmers is the fastest technique to achieve the talents required for connecting your Java program to a SQL database. sensible, tutorial-based insurance retains you centered at the crucial initiatives and methods, and incisive factors cement your knowing of the API gains you will use many times. No different source provides so concisely or so successfully the precise fabric you must wake up and operating with JDBC instantly. * offers tutorial-based guide in key JDBC innovations, complemented via instance code.* based round an incrementally constructed instance of a three-tiered program for a video apartment e-commerce site.* Designed that can assist you take on average JDBC initiatives: connecting your database to the net, showing question effects, utilizing saved tactics, updating the database, storing metadata, engaging in transactions, operating with binary huge gadgets, enforcing protection, and more.* through the better half site, presents code for the examples, instruments for loading the instance database, hyperlinks to helpful JDBC websites, and a discussion board during which to engage with different readers.

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Extra info for JDBC: Practical Guide for Java Programmers (The Practical Guides)

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Show() ; PJ. setViewportView(dataTable); //from JTableJDBC public void exitWindow(int i) { CJ. closeConnection(dbConnect, dbStatement ) ; System. exit (i) ; } CallableJDBC The data members for CallableJDBC are similar to PreparedJDBC, except that we have a CallableStatement object instead of a PreparedStatement. The main() m e t h o d is simple and obvious. In the constructor (lines 17-28), there are a couple of subtle differences. First, since the query is slightly different, the text for the input field is changed in line 19.

Run tests to d e t e r m i n e if y o u r d a t a b a s e benefits f r o m PreparedStatements. java to include timing i n f o r m a t i o n a n d to execute a very long q u e r y m a n y times (with different p a r a m e t e r s ) . One possible e x a m p l e is to g e n e r a t e a list of c u s t o m e r s who have never r e n t e d a given title. T h e n m o d i f y the p r o g r a m to use Statements i n s t e a d of PreparedStatements. D e t e r m i n e which is faster. ~ Chapter 3: Querying the Database m 3.

The ResultSet interface also includes the m e t h o d s first() and last(), which move the cursor to either the first or last row, respectively. Additionally, the interface contains the m e t h o d getRow(), which r e t u r n s the row n u m b e r . This provides an easy m e c h a n i s m to d e t e r m i n e the n u m b e r of rows in the ResultSet, rs. last () ; numberRows = rs. 0 ResultSet objects replaces the use of vectors within our JTable example. The p r o g r a m c o n s i s t s of two new parts: JDBC2TableModel, which e x t e n d s JDBCTableModel, and TableModelJDBC2, which e x t e n d s TableModelJDBC.

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