Home Accessibility Courses Twitter The Mouth Facebook Resources Site Map About Us Contact
For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))
Java - an update of the basics

Java is a programming language - a way of specifying a series of operations to be performed one after another to a computer which is written in a coded way - often described as "English Like" - rather than in a binary pattern of zeros and ones which all computers work with at the lowest level.

If you're using Java, you'll usually write your operations or instructions into a file with a .java extension, and then use a program (a "java compiler") to convert those instructions into a format that's not human-readable called a "class file". That class file is designed to be efficient in operation when you run your program, to be modular so that code can easily be shared between multiple programs, and to be portable so that it can run on all sorts of different systems without needing to be changed. And in order for it to run so widely, each machine it runs on needs to be provided with a common interface to run it - that's itself a program called a Java virtual machine or JVM.

Java started off at release 1.0 and has progressed through to Java 1.8. Sun Microsystems, Java's originators, were very conservative in moving release numbers forward, sticking with "1.x" because the code written for 1.0 is still operational on 1.8 (i.e. to this day) with no breaks in compatability.

However, Java was extended and provided with so many extra packages over time that it's became a different prouct and so it was known as "Java 2" from around version 1.2 ... and that carried on until "Java 2" version 1.5. From that point onward, the marketing name has been Java 5, Java 6, Java 7 and now Java 8.

Now an Oracle product, with Oracle having bought out Sun Microsystems in 2010, Java these days is both a server and a device programming language, with web servers supporting major applications written in Java, and phones such as the Android also having their apps written in Java. The days of it being just an embedded language within a browser are a distant memory.

At Well House Consultants, we have taught Java from the early days of the language - and you'll find many examples on our web site including stand alone ones, ones to be embedded in browsers ("applets") and also server side code in the form of Servlets and JSPs (Java Server Pages).

Java is a well designed language - however, in the earlier days it was much oversold and I found that a significant proportion of delegates learning the language were doing so to use in applications for which its wasn't / isn't suited - there are circumstances where Perl or Tcl or PHP were much better in those earlier days, and today perhaps Python, Lua, PHP or Ruby might be a good decision. And so - with many other courses to offer, and many other people teaching Java, we dropped public Java courses while continuing to offer the training on closed or private courses to companies and organisations who we felt were using Java for reasons that we could endorse - of which there are many.

Progressing, Java has branched off in many directions. Where there were just 8 standard add-on packages with Java 1.0, there are now thousands, and it's simply not possible for one small company to honestly say they know them all (or even all of the common ones!) ... and training requirements will often include not only the basics, but also some extension or other. And as we just know "of" the extensions, rather that their detail, our private Java courses these days are limited to the fundamentals of programming in the language. We are happy - very happy - to teach your group "Learning to program in Java" and indeed I have a series of such courses coming up. And we also provide one area of more extended training, which is in deploying Java applications under the Apache Tomcat server - that as a public course as well as a private course - see [here].
(written 2014-11-16)

Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
A504 - Web Application Deployment - Java - Terminologes, Technologies and releases.
  [124] PHP v Java - (2004-11-20)
  [1766] Diagrams to show you how - Tomcat, Java, PHP - (2008-08-22)

J050 - Java - General
  [2087] Comparing Java Courses - what can we do? - (2009-03-17)
  [2091] C, C++ and C# ... Java and JavaScript - (2009-03-20)
  [2114] Which Version of Java am I running? - (2009-04-02)
  [2417] Java Programming Fundamentals - (2009-09-24)
  [2420] Exceptions in Java - why and how - (2009-09-24)
  [2504] Learning to program in ... - (2009-11-15)
  [2861] MySQL and Java - connectivity past, present, and future thoughts - (2010-07-09)
  [3573] New in Java 7 - and why we are not running public Java 7 courses - (2012-01-08)
  [4305] Learning to program in Java - yes, we can help. - (2014-09-26)
  [4412] Java -making sure you have the right versions - (2015-02-02)
  [4430] The spirit of Java - delegating to classes - (2015-02-18)

Back to
Too many Staffies, too many lurchers
Previous and next
Horse's mouth home
Forward to
Learning to Program - how we start to teach you at Well House Consultants
Some other Articles
Are administration / review charges on hotel guests acceptable?
An example of Model-View-Controller techniques in a Perl / CGI script
PHP - some quick fixes if scripts have issues, and how to use our support
Learning to Program - how we start to teach you at Well House Consultants
Java - an update of the basics
Too many Staffies, too many lurchers
Welcoming genuine forum posters quickly - but turning away off topic advertisers
PHP training - refreshed modern course, backed up by years of practical experience
Moving community rail support from amateur to professional
Officially overcrowded in the first year
4759 posts, page by page
Link to page ... 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96 at 50 posts per page

This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

Link to Ezine home page (for reading).
Link to Blogging home page (to add comments).

You can Add a comment or ranking to this page

© WELL HOUSE CONSULTANTS LTD., 2024: 48 Spa Road • Melksham, Wiltshire • United Kingdom • SN12 7NY
PH: 01144 1225 708225 • EMAIL: info@wellho.net • WEB: http://www.wellho.net • SKYPE: wellho

PAGE: http://www.wellho.net/mouth/4317_Jav ... asics.html • PAGE BUILT: Sun Oct 11 16:07:41 2020 • BUILD SYSTEM: JelliaJamb