A question from Campbell posted in the announcement thread

Campbell Ritchie wrote:Now that Java8 is out and there are new features, do we think Bloch ought to write a 3rd edition or leave the new features to people like Horstmann? You will find several discussions of Java8 books in the Java8 forum.

What do you think?

Where's the 'Thumbs Down' button?

My favourite software design tool is a pencil, paper, and an eraser. If your handwriting is a bit 'free-form' then try writing slower to improve it, the extra time taken will give you more time to consider your design options.

Aftab Hassan wrote:New Server RunTime Environment

I'm guessing that this is an option you found in Eclipse?

I'm also guessing by the 'apt-get' reference that you're using Linux. In which case if you run the command "ps -ef | grep java" and look for the process that looks like your application then you'll most likely be able to find out what servlet container is being used. It'll be the one bundled in with Eclipse, probably Jetty or Tomcat.

On page 3

Effective Java wrote:The book's Web site, http://java.sun.com/docs/books/effective, contains an expanded version of each example, which you can compile and run

Not any more I'm afraid. Has it moved home? Or is it just gone? It would be nice to try out the examples for real without having to type them in by hand.

Sticky thread here where you can make your book and online course suggestions

Do you have a book in mind that you think would be great as the CodeRanch Book of the Month? If so, post your suggestions here.

2014 Book schedule:

August : Effective Java by Joshua Bloch

September : Clean Code by 'Uncle' Bob Martin

October : The Pragmatic Programmer: From Journeyman to Master by Andrew Hunt, David Thomas

November : Practical API Design: Confessions of a Java Framework Architect by Jaroslav Tulach

December : Secrets of the JavaScript Ninja by John Resig, Bear Bibeault

2014 Online course schedule:

August 25th - October 20th : "Algorithmic Thinking" run by Rice University (via Coursera)

September 15th - November 16th : "An Introduction to Interactive Programming in Python" run by Rice University (via Coursera)

Suggestion pool:

Agile Software Development: The Cooperative Game (2nd Edition) by Alistair Cockburn (1 vote)

A Discipline of Programming by Edsger W. Dijkstra (1 vote)

Java Puzzlers by Joshua Bloch & Neal Gafter (1 vote)

The Software Conspiracy by Mark Minasi (1 vote)

Geekonomics: The Real Cost of Insecure Software by David Rice (1 vote)

Iron-Clad Java: Building Secure Web Applications by Jim Manico & August Detlefsen (1 vote)

It is the intention that the choice of books will be driven by the members. I picked the first one just to get us going although we did have a small vote on it in the original thread.

I agree that some advance notice of the schedule would be help the logistics of getting hold of a copy of the book. I think a sticky thread would serve that purpose just nicely.

Then option 1 applies. They'll just be looking for a basic working knowledge of using the shell (equivalent to Windows Command Prompt). My recommendation for practice would be to install Ubuntu on a VM like VirtualBox.

Pallavi Sadit, We liked your idea so much that we've gone and made it a reality... How awesome is that! (Awesome enough for another Cow, that's for sure)

We have a brand new forum to meet in: The Bunkhouse Lounge

And we have our first feature: Book Club - August 2014 : “Effective Java” by Joshua Bloch

I hope you'll dust off your copy and join us.

Howdy folks,

Welcome to the Bunkhouse Lounge! This is where we come to talk about our favourite books, discuss what we like, don’t like, don’t understand, anything at all. There’s enough room for everyone so drop in and make yourself comfortable.

For the Month of August we are inviting you to read Joshua Bloch’s “Effective Java” with us. Grab yourself a copy and let the discussions begin!

Thinking of buying a copy from Amazon? Support CodeRanch by using this referral link:
- Amazon (US) : “Effective Java” by Joshua Bloch

I think it really depends on what the job is that you're applying for. That requirement would mean different things.

If you're applying for a Software Developer job, then that statement means "Our application servers are Linux and we want you to roughly know your way around them. Oh by the way, our admin guys tells us it's Bash".

If you're applying for a Server Support / Admin role then that statement means "Our application servers are Linux and we want you know everything there is to know about them. Oh and by the way, our existing scripts are written in Bash and you'd better know why that's important".

I'm very jealous Jelle. I have that game on pre-order and I'm expecting it to arrive on Friday, i.e. the release date. You're a lucky so and so for getting it 2 days early!

This week, we're delighted to have Godfrey Nolan helping to answer questions about the new downloadable video training Android Security Essentials Live Lessons.

The promotion starts Tuesday, July 29th, 2014 and will end on Friday, August 1st, 2014.

We'll be selecting four random posters in this forum to win a free copy provided by the publisher, Addison-Wesley.

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.

Howdy, welcome to the Ranch!

I've edited the title of your post, using all capitals gives the impression you're shouting so please KeepItDown (<- read this article)

You'll get the most help here if you ShowSomeEffort first. We are NotACodeMill so nobody is going to do it for you. So, show us what you've tried so far and tell us what particular thing you're having trouble with. Something along the lines of "I thought doing this thing here would work but it didn't. I expected this to happen but instead that happened" would be a good place to start.

Hello P Mayur, Please be mindful that we are all volunteers here and a bit of patience on your part goes a long way. We have a couple of articles discussing our policy on this that I invite you to read. Firstly -> EaseUp, secondly -> PatienceIsAVirtue. You've been getting some excellent help here so far so please sit tight, I'm sure that help will continue in due course.

In the meantime why don't you take the opportunity to read over again the posts from Ulf and Henry to see if there's something you missed. For example, the suggestion to put some System.out.println() statements in your code to print out the values of your variables at key points of your code flow will help you closely inspect whether you are getting the values you expect at those points in your program. It's a simple but effective technique.

Pallavi Sadit wrote:My vote for "Effective Java" This book has lots to offer at each read.

Agreed, I think this would be a great place to start.

Jaikiran Pai wrote:Maybe choosing a non-technical book might help the interest?

There's probably some mileage in that idea but my only thought is where we would host the discussion. For example, I think that Pragmatic Thinking and Learning is an excellent non-technical book but in what forum would we discuss it?

Alright, so our resident Servlet and JSP Ninja has passed on his copy to the next worthy winner.

And that winner is.......... Harsha Lingareddy. Congratulations!

Java 8 supports this out of the box with Parallel Streams. No need to implement it yourself.

First, a big thanks to Joel Murach for being here to promote the book Murach's Java Servlets and JSP.

The winners are:

Shiva Gajjala

Bruce Alspaugh

Bear Bibeault

Faisal Ahmad

Harsha Lingareddy

Please send your snail mail address to bookpromotion AT javaranch DOT com. To ensure the quickest response, please provide the following:

Your name (first and last - preferably the one you use on CodeRanch)
Address (including country)
Phone Number
Email
Whether you prefer an e-book if one is available

Also, please include the following as the subject of your Email.

Book Promo Winner - Murach's Java Servlets and JSP - Tuesday, July 22nd, 2014

As noted in the Book Promotion Eligibility Requirements and Legal type stuff, the winners have 8 days to submit their information.

Thanks and congrats to all the winners.

Hello Jos, While we don't mind if you cross post your questions on other sites we do ask that you let us know that you have done so. Please have a read of the link to see why -> BeForthrightWhenCrossPostingToOtherSites.

This question was also posted here

Oh yes, I heard the stories..... You crazy cats!

With regards to deciding how big to make your Thread Pool, it depends on the hardware you are running your application on. Suppose you have a Quad Core machine, then you can only run 4 threads in parallel. If you're writing files to a physical mechanical disk then how many write heads does it have? You can't write 100 files in parallel if your disk only has 2 write heads.

Often having a thread pool too large will actually degrade performance because you are introducing contention on your physical resources. Martin Thompson calls this Mechanical Sympathy

Wow, that Moose can talk!

What an interesting idea! It's hard to predict how well it would work here but I definitely think it's worth trying.

Here's some "classics" from my book collection to get us started with suggestions:

Clean Code - 'Uncle' Bob Martin

Test-Driven Development by Example - Kent Beck

Effective Java - Joshua Bloch

This information is readily on the net already so I don't think there's any point going over it again here. Try Wikipedia: Memory Leak for starters. As for how to resolve it. It depends on what's causing it.

Do you have a specific problem that you want to discuss?

Not sure what you mean by this. Can you elaborate with an example?

Suppose that you could find out such statistics. What good would it do you?

It will not necessarily be representative of how many actual java developers there are in the World. For example: I'm a Java Developer but I'm not a "Certified" Java Developer in any way so I would not be counted in your statistics. Also some geographical regions put more importance on having a certification. In my observation it seems that in India people seem to hold certifications in quite high regard, but in the UK where I live nobody I've met is particularly fussed about it.

But the whole point is moot because as Ulf says, you're very unlikely to be able to find out such information.

Essentially the same question as this other one you posted. You have gotten some replies so let's continue over there.

As a side note to the discussion: An abstract class with nothing but abstract methods defined in it serves the same purpose as an interface. So make it an interface.

Then in your classes instead of extending Animal you should implement it

I would not be so quick to dismiss Jeanne's suggestion of the Patterns of Enterprise Application Architecture book. The majority of the patterns described in it are still very much as valid today as they were when published. Martin Fowler's website provides a pretty high level summary of each pattern but the book itself is the complete reference. Highly recommended.

I don't want to belabour the point too much but "as fast as possible" is not a realistic requirement. This is the response you'll get from any customer when you ask them "How fast to you need it?". You need to clarify what this means and be able to define how fast is fast enough. Any faster than that is a waste.

If you really do need performance to be "as fast as possible" then you'd better dust off that credit card because you're going to need it to buy that 10 acre data center filled with top of the range over-clocked super computer farm. Oh, and brace yourself for the monthly energy bill.

Andy Storm wrote:but writing to database adds penalty to performance

Until you know you have a performance problem and can prove that the bottleneck is in writing to your DB then I would not worry about it. Implement the simplest thing that solves your problem. Then if, and only if, you have observed substandard performance through thorough testing and measurement, should you look to implement any optimisations.

Otherwise you may spend a lot of time, and potentially money, fixing an issue that just doesn't exist.

Where there are people, there will be politics and opinions. That's just human nature.

While your CEO is perfectly entitled to have an opinion, and he may choose to announce it to the break room, you are not obliged to agree with him or engage in a discussion about it with him.

He may be just as outraged that you have no opinion on the matter as you are that he has such a strong opinion.

Bear Bibeault wrote:If it were one of my dogs, the Earth would be 70% shedded fur.

If it were my cat, the Earth would be lost under the sofa.

Hello, welcome to the Ranch!

Do you have a question?

This week, we're delighted to have Joel Murach helping to answer questions about the new book Murach's Java Servlets and JSP. Check out the table of contents: http://www.murach.com/books/jsp3/toc.htm

The promotion starts Tuesday, July 22nd, 2014 and will end on Friday, July 25th, 2014.

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

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.

That and the fact that replicating data across multiple, physically separated, nodes in a non-trivial / extremely hard problem. This is why projects like Hadoop exist and are so popular.

I second Ulf's recommendation.