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For 2021 - online Python 3 training - see ((here)).

Our plans were to retire in summer 2020 and see the world, but Coronavirus has lead us into a lot of lockdown programming in Python 3 and PHP 7.
We can now offer tailored online training - small groups, real tutors - works really well for groups of 4 to 14 delegates. Anywhere in the world; course language English.

Please ask about private 'maintenance' training for Python 2, Tcl, Perl, PHP, Lua, etc.
First Java Application - calculating the weight of a tablecloth

From last week's Java course - the first practical demonstration program I wrote:
• prompts for user input
• reads that input
• calculates
• outputs results

That's the stage I look to get to quickly on a course to give my delegates some idea early on of how the language goes together - source code in this case is [here].

In Java, reading from the keyboard is reading from a stream for which you have to use an appropriate class. You must catch exceptions which can be of various types, all of which are direct or indirect subclasses of a base class object. If this is starting to feel complex, fear not. "If you want to do something that's commonly done, chances are people have done it before and made it available" ... and indeed I have provided a class (well reader) which hides all this complexity from the newcomer and lets you read numbers easily.

The actual application reads the width and length of a table, and calculates the weight of a table cloth to fit that table, with appropriate overhang. Should you ask "who weighs their table cloths" I will answer "we do" - weighing linen is a very useful way for a commercial cafe or hotel to tell similar but not the same pieces apart once they've been washed and ironed, and our scales are a vital piece of laundry equipment!
(written 2014-11-29)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
J601 - Java Introduction
  [25] Release numbers - (2004-08-23)
  [111] Training notes available under Open Distribution license - (2004-11-07)
  [124] PHP v Java - (2004-11-20)
  [317] Programming languages - a comparison - (2005-05-20)
  [792] Is Java the right language to learn? - (2006-07-04)
  [871] Java oversold? - (2006-09-19)
  [1049] Java 6, Apache Tomcat 6. - (2007-01-21)
  [1158] Private Java Course - A customer's pictures - (2007-04-22)
  [1418] A Golf Club Decision - Perl to Java - (2007-11-01)
  [1466] Effective Java training - the bootcamp approach - (2007-12-09)
  [1497] Training Season Starts again! - (2008-01-07)
  [1557] Trying out our Java examples on our web site - (2008-02-27)
  [1766] Diagrams to show you how - Tomcat, Java, PHP - (2008-08-22)
  [1908] Java CLASSPATH explained - (2008-11-26)
  [2115] Finding your java program - the CLASSPATH variable - (2009-04-02)
  [2423] What is a JVM, a JRE, a JDK - components of the core Java Environment - (2009-09-26)
  [2536] All the Cs ... and Java too - (2009-12-13)


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Some other Articles
Test Driven Development - a first example of principle in C
Flexible public courses - residential or commuting, programming newcomer or experienced, C or C++
Splitting out code into name blocks for clarity and reusability
Misty Melksham Morning
First Java Application - calculating the weight of a tablecloth
Musings on a Welsh town
Java - factory method, encapsulation, hashmap example
Does Santa Claus need a CRB check?
Folk music train, Westbury to Swindon round trip, 14th December 2014
Good, stable, reliable local businesses
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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.

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