You can read the Force.com Workbook "Get Started Building Your First App in the Cloud - Quick 30 min Tutorials". In this book you can learn how to build a very simple application which uses some Apex code.
After that, you can take a look at the "force.com CookBook" ISBN: 978-0-9789639-2-7. It has a chapter that explains clearly about writing Apex code.
Of course, guideline document from Salesforce about Apex is also a great help.
Hi,
You can read the Force.com Workbook "Get Started Building Your First App in the Cloud - Quick 30 min Tutorials". In this book you can learn how to build a very simple application which uses some Apex code.
After that, you can take a look at the "force.com CookBook" ISBN: 978-0-9789639-2-7. It has a chapter that explains clearly about writing Apex code.
Of course, guideline document from Salesforce about Apex is also a great help.
Hope this help,
TL
"Development with the Force.com Platform"
ISBN: 0-321-64773-4
Best I've seen so far.