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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 Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own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))
Which Version of Java am I running?

Write a test program to use the getProperty method on System:

public class Sample {
  public static void main (String [] args) {
  System.out.println("*** Hello Melksham ***");
  System.out.println(System.getProperty("java.vm.vendor").toString());
  System.out.println(System.getProperty("java.version").toString());
  }
}


Compile it

[trainee@easterton a9tom]$ javac Sample.java

and run it!

[trainee@easterton a9tom]$ java Sample
*** Hello Melksham ***
Sun Microsystems Inc.
1.6.0_10-beta
[trainee@easterton a9tom]$


It is VITAL (did I shout vital loudly enough for you?) to have the correct version of Java in use when you run your Tomcat!. Today's course ... I am using Sun's Java 6 (a.k.a. 1.6) which will work with Apache Tomcat up to version 6. Don't assume that Tomcat and Java version numbers always match up nicely in this way - they don't
(written 2009-04-02)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
J708 - Java - Packages
  [754] tar, jar, war, ear, sar files - (2006-06-10)
  [2419] Where is my Java class? - (2009-09-24)
  [2865] Relationships between Java classes - inheritance, packaging and others - (2010-07-10)

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)
  [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)
  [4317] Java - an update of the basics - (2014-11-16)
  [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
Answering a question with a question
Previous and next
or
Horse's mouth home
Forward to
Finding your java program - the CLASSPATH variable
Some other Articles
Spring Sprung
Choosing a railway station fairly in PHP
Why do we delay new forum members through authorisation?
Finding your java program - the CLASSPATH variable
Which Version of Java am I running?
Answering a question with a question
Whatever next ... the joys of being an employer
Business Networking for Melksham - 23rd April
MySQL - looking for records in one table that do NOT correspond to records in another table
Why most training fails ...
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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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