Thread: core java begineer

Hi

I'm new to java and this blog as well. I started learning core java
and oops concepts. Right now, i'm working on jxl which deals with
creation of excel and more on..

When i see the code to create the workbook it was written as

WritableWorkbook workbook = Workbook.createWorkbook(file, wbSettings);

I'm not clear with above snippet and how it is creating the book. I
browsed the java doc and noticed that Workbook and WritableWorbook are
Abstract class.

Also, when i see .class of both.


/* */ public static WritableWorkbook createWorkbook(java.io.File
file)
/* */ throws IOException
/* */ {
/* 286 */ return createWorkbook(file, new WorkbookSettings());
/* */ }

Please explain why we have WritableWorkbook in method of Workbook and
what it returns and flow of the alogritham

Thanks

You need to read up on method definitions and static methods.
Try this site:
Trail: Learning the Java Language: Table of Contents (The Java™ Tutorials)

Both WorkBook and WritableWorkbook classes are extended by Object (the Parent/Root of all classes).
WorkBook contains a method createWorkBook() which accepts a File type parameter and returns a WritableWorkBook after processing. createWorkBook() is only defined in WorkBook method and as it returns WritableWorkBook so

WritableWorkBook obj = WorkBook.createWorkBook(File fileObj);

This will pass fileObj to createWorkBook of WorkBook and get a WritableWorkBook object which will be assigned to WritableWorkBook object.
I hope it seems clear now.