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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.
Java Compiler - needs all classes, compiles them all too

Remember that when you compile a java source file ...

a) You must have the classes it will use when it runs available to the compiler so that it can check (a bit frustrating at times if you're compiling on one machine but going to be running on another)

b) If you supply only java course code for some of the classes used within the class you're compiling, or have updated the sources of those used classes, Java will automatically recompile them. (this can be a bit confusing when you see an error message referring to "line 65" and don't even have a line 65 in the file you've asked to be compiled - the error being in one of the other files)

Here's an example where I compiled a "Sales" application on last week's Java Course:

Dorothy:c2 grahamellis$ ls
Period.java Product.java Sales.java Single.java
Dorothy:c2 grahamellis$ javac Sales.java
Dorothy:c2 grahamellis$ ls
Period.class Product.class Sales.class Single.class
Period.java Product.java Sales.java Single.java
Dorothy:c2 grahamellis$


See that running here

(written 2008-03-03)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
J606 - Java Roadmap - Beyond the Fundamentals
  [1049] Java 6, Apache Tomcat 6. - (2007-01-21)
  [1910] Java - Generics - (2008-11-27)
  [2036] Java Tag Libraries / how they work / Tomcat Deployment - (2009-02-11)
  [3043] Gathering information - logging - with log4j. First steps. - (2010-11-12)
  [4305] Learning to program in Java - yes, we can help. - (2014-09-26)

A502 - Web Application Deployment - Java - Basic Tools
  [754] tar, jar, war, ear, sar files - (2006-06-10)
  [1082] Straight from the .jar - (2007-02-16)
  [1192] What are WEB-INF and META-INF directories? - (2007-05-18)
  [1771] More HowTo diagrams - MySQL, Tomcat and Java - (2008-08-24)
  [1909] javax.servlet cannot be resolved - how to solve - (2008-11-26)
  [2153] Class Loading and Variable Conversion in Java - (2009-05-02)
  [2422] Looking inside Java classes - javap and javadoc - (2009-09-25)
  [2859] Using java, javac, jar, and CLASSPATH - a simple example - (2010-07-07)
  [3151] Disassembling Python and Java - previously compiled code - (2011-01-29)
  [3819] Packing a tar, jar or war file - best practise - (2012-07-26)
  [4412] Java -making sure you have the right versions - (2015-02-02)


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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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