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 Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own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 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)
Some other Articles
Strange behaviour of web directory requests without a trailing slashLanguages compared - based on developer community sizeDefault file (MiMe types) for Apache httpd and Apache TomcatGuidlines for posting on a forumJava Compiler - needs all classes, compiles them all tooUploading to a MySQL database through PHP - examples and common questionsHST Power Car TravelWatch SouthWestCalling on Melksham / Trowbridge / Devizes / Chippenham businessesGetting somewhere with the train serviceTrying out our Java examples on our web site
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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.
Link to Ezine home page (for reading).
Link to Blogging home page (to add comments).
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