Jeanne Boyarsky

This week, we're delighted to have Jeff Friesen helping to answer questions about the new book Java XML & JSON.
See the table of contents or a free preview online.

The promotion starts Tuesday, February 12th, 2019 and will end on Friday, February 15th, 2019

We'll be selecting four random posters in this forum to win a free copy of the book provided by the publisher, Apress.


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Please see the Book Promotion page to ensure your best chances at winning!

Posts in this welcome thread are not eligible for the drawing, and should be reserved for welcoming the author. Questions posted in this topic are subject to removal.

Campbell Ritchie wrote: You will also have to use the NIO classes and try‑‑resources from Java7,

Note that these are on the 809 (OCP), not the 808 (OCA)

Congratulations! Those are awesome scores!

I appreciate that you posted your end of chapter and mock scores here. It's helpful for people assessing whether they are ready.

Got it. So the idea is to have four local databases instead of one.

I think you are going to need to look at bandwidth use for the database. It might be easier to have one database that all four grids reference. Or it might be easy to keep the views in sync and be a moot point.

I wrote a blog post about the possible meanings of "it's easy". Can you think of any more?

Are you saying that you still get:
mes1: Sender: null subject: null content: null date: null
mes2: Sender: google100gmail.com subject: Subject content: how's going? date: 2/1/1998

Where did you hear the word? What was the context? Is there sample code? Did you read it on a website?

rian bron wrote:
//output "Daniel"
//output "Daniel"
is these outputs are correct. or whether the first output will be "hello".

They will both be "hello" because you are calling the "get" method before anything else happens.

rian bron wrote:
and another question, is it possible to write the constructor name only as Tester(String _name); instead of public Tester(String _name)?

In this case, you can. When you remove the "public", the access type is package-private. This means you can use it in that class or package.

When I run your code, I get:
mes1: Sender: google100@gmail.com subject: hello  content: How are you today? date: 1/1/2019 mes2: Sender: google100gmail.com subject: Subject content: how's going? date: 2/1/1998

The output you describe shouldn't be possible. Maybe try re-compiling in case you aren't running the same code you posted here?

Interesting question. I'd say it's a web application. Or an enterprise web application. Or a web platform.

That's not a lot of data so whatever you choose, it'll be quick.

Since you are migrating between schemas, you need to express how the data should change. While I imagine that data warehouse tools can do this, it seems like overkill for your scenario. I recommend just writing a program to do it.

Bob Matthews wrote:The four computers are used to run four different database table configurations

I don't understand this. Are you saying to separate tables across four computers? That seems unnecessary.

Things to think about: how much data will you have in the database? is this program IO or CPU bound? What limitations do you hit on a single computer? How many users will you have?

Will Myers wrote:I can see this book is 456 pages which doesn't seem long enough to cover the topics in any great detail (the OCP study guide is around 950 pages) so who is the target audience?

The OCP study guide has to cover a bunch of edge cases and details that are on the exam. It also needs to have practice questions that take up a lot of space.

The Nutshell book actually covers a lot more material in a shorter space.

First, a big thanks to Ben Evans & David Flanagan for being here to promote the book Java in a Nutshell.

The winners are:

Will Myers
Vanessa Williamson
Dave Tolls
Cezar Apulchro

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Book Promo Winner - Java in a Nutshell - Tuesday, January 29th, 2019


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As noted in the Book Promotion Eligibility Requirements and Legal type stuff, the winners have 8 days to submit their information. Within 3 days of receipt of your email, we will reply to let you know we got it. If you don't hear back, the goat might have eaten your email. Please let us know by posting in the Ranch Office so we can check on it. Once you have received your copy please let us know by editing the Book Promotions Winners Page and updating the 'Status' column to say you have it.

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