Comments on: Talking to MySQL: Your First Look at JDBC http://www.sitepoint.com/blogs/2004/10/29/talking-to-mysql-your-first-look-at-jdbc/ Tue, 14 Oct 2008 00:31:49 +0000 http://wordpress.org/?v=2.5 By: aparna_grk http://www.sitepoint.com/blogs/2004/10/29/talking-to-mysql-your-first-look-at-jdbc/#comment-11671 aparna_grk Thu, 08 Dec 2005 13:00:27 +0000 #comment-11671 hi, in this code, can u telme how i cant display both the id and the item? The ‘System.out.print.ln(”—” + it.next());’ display only the String Item, since it calls the 'toString()' method. But how can one also return the int id value.? Kindly guide. thanks hi, in this code, can u telme how i cant display both the id and the item?
The ‘System.out.print.ln(”—” + it.next());’ display only the String Item, since it calls the ‘toString()’ method. But how can one also return the int id value.?
Kindly guide.
thanks

]]> By: vgarcia http://www.sitepoint.com/blogs/2004/10/29/talking-to-mysql-your-first-look-at-jdbc/#comment-4467 vgarcia Wed, 31 Dec 1969 19:00:00 +0000 #comment-4467 <p>Cool stuff Kev. Looking forward to more in the series.</p> Cool stuff Kev. Looking forward to more in the series.

]]> By: Angus Rose http://www.sitepoint.com/blogs/2004/10/29/talking-to-mysql-your-first-look-at-jdbc/#comment-4468 Angus Rose Wed, 31 Dec 1969 19:00:00 +0000 #comment-4468 <p>Excellent tutorial. The only thing I'd add is a finally block for each method that uses a connection object e.g.</p> <p>finally<br /> {<br /> try{<br /> <br /> conn.close();<br /> conn = null;<br /> <br /> }catch(SQLException sqle){<br /> System.err.println("DatabaseConnector.deleteItem(int id)");<br /> System.err.println(<br /> "Error closing database connection:\n" +<br /> sqle.getMessage());<br /> }<br /> }</p> <p>It just frees up an unused resource - the connection object in this case.</p> Excellent tutorial. The only thing I’d add is a finally block for each method that uses a connection object e.g.

finally
{
try{

conn.close();
conn = null;

}catch(SQLException sqle){
System.err.println(”DatabaseConnector.deleteItem(int id)”);
System.err.println(
“Error closing database connection:\n” +
sqle.getMessage());
}
}

It just frees up an unused resource - the connection object in this case.

]]> By: gesf http://www.sitepoint.com/blogs/2004/10/29/talking-to-mysql-your-first-look-at-jdbc/#comment-4469 gesf Wed, 31 Dec 1969 19:00:00 +0000 #comment-4469 <p>A very interesting article...!<br /> Thanks for sharing your knowledge with us Kevin ;)</p> A very interesting article…!
Thanks for sharing your knowledge with us Kevin ;)

]]> By: Kevin Yank http://www.sitepoint.com/blogs/2004/10/29/talking-to-mysql-your-first-look-at-jdbc/#comment-4470 Kevin Yank Wed, 31 Dec 1969 19:00:00 +0000 #comment-4470 <p>Angus, opening and closing database connections is a time-consuming process, which is why the class caches the connection, keeping it open between method calls. When the object is garbage collected, the connection will be closed on its own. The application will use a bit more memory keeping that connection open, yes, but the performance boost is worth it.</p> Angus, opening and closing database connections is a time-consuming process, which is why the class caches the connection, keeping it open between method calls. When the object is garbage collected, the connection will be closed on its own. The application will use a bit more memory keeping that connection open, yes, but the performance boost is worth it.

]]> By: asp_funda http://www.sitepoint.com/blogs/2004/10/29/talking-to-mysql-your-first-look-at-jdbc/#comment-4471 asp_funda Wed, 31 Dec 1969 19:00:00 +0000 #comment-4471 <p>Absolutely spiffing Kev, nothing less was expected. :D<br /> Its nice being back, sipping Java!! ;)</p> Absolutely spiffing Kev, nothing less was expected. :D
Its nice being back, sipping Java!! ;)

]]> By: ed.j http://www.sitepoint.com/blogs/2004/10/29/talking-to-mysql-your-first-look-at-jdbc/#comment-4472 ed.j Wed, 31 Dec 1969 19:00:00 +0000 #comment-4472 <p>Most excellent. Up to this point I understood everything, except why only the string of the object was printed ... I had a friend explain to me that the line 'System.out.print.ln(" - " + it.next());' assumes, i.e. 'calls' the 'toString()' method of the object.<br /> Very good tutorial so far! I cut my teeth on your PHP/MySQL book years ago, and I haven't looked back ...</p> Most excellent. Up to this point I understood everything, except why only the string of the object was printed … I had a friend explain to me that the line ‘System.out.print.ln(” - ” + it.next());’ assumes, i.e. ‘calls’ the ‘toString()’ method of the object.
Very good tutorial so far! I cut my teeth on your PHP/MySQL book years ago, and I haven’t looked back …

]]> By: Tom http://www.sitepoint.com/blogs/2004/10/29/talking-to-mysql-your-first-look-at-jdbc/#comment-4473 Tom Wed, 31 Dec 1969 19:00:00 +0000 #comment-4473 <p>To get the test driver to run, I had to change the semi-colon to a colon:</p> <p>java -classpath .:mysql-connector-java-3.0.15-ga-bin.jar com.sitepoint.ToDoTest</p> <p>Otherwise, java said that it could not find com/sitepoint/ToDoTest.</p> To get the test driver to run, I had to change the semi-colon to a colon:

java -classpath .:mysql-connector-java-3.0.15-ga-bin.jar com.sitepoint.ToDoTest

Otherwise, java said that it could not find com/sitepoint/ToDoTest.

]]> By: Ken http://www.sitepoint.com/blogs/2004/10/29/talking-to-mysql-your-first-look-at-jdbc/#comment-4474 Ken Wed, 31 Dec 1969 19:00:00 +0000 #comment-4474 <p>is there any place to get the schema and data for the todolist tables-a sql file??</p> is there any place to get the schema and data for the todolist tables-a sql file??

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