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Training, Open Source Programming Languages |
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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 Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own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)) |
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Java beans and classes, .war and .jar files
A Java Bean is a class that includes a constructor that takes no parameters, and getter and setter methods with names like getLength and setLength to read and write properties. So at a basic (Java) level, a bean is just a class that happens to conform to some conventions. However - when you come to tag libraries such as those used in Java Server Pages (JSPs), the convention becomes a mandatory rule that must be applied to make the class usable in this way. A .war file (Web Archive file) is a .jar (Java Archive file) that includes a welcome file such as index.html at the top level of the tree, and a subdirectory WEB-INF that contains a web.xml file. So at a basic level, a .war file is just a .jar file that happens to conform to some conventions. However - when you come to deploying web applications in a container vehicle such as Tomcat, the conventions become mandatory rules that much be followed if the web application is to deploy correctly. (written 2007-02-10) Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles J812 - Java Beans[2155] No subject or title? - (2009-05-03) [3046] Java Beans, tag libraries and JSPs - what and why. - (2010-11-13) A653 - Web Application Deployment - Tomcat - Configuring Web Applications [465] Changing Tomcat's web.xml and reloading a web application - (2005-10-15) [479] New servlet from old - (2005-10-28) [754] tar, jar, war, ear, sar files - (2006-06-10) [1006] Apache httpd and Apache Tomcat together tips - (2006-12-24) [1082] Straight from the .jar - (2007-02-16) [1192] What are WEB-INF and META-INF directories? - (2007-05-18) [1552] Extra public classes in deploying Apache httpd and Tomcat - (2008-02-24) [1564] Default file (MiMe types) for Apache httpd and Apache Tomcat - (2008-03-04) [1909] javax.servlet cannot be resolved - how to solve - (2008-11-26) [2088] Changing the 404 - file not found - page in Tomcat - (2009-03-18) [3044] Changing a Servlet - more that just editing and compiling - (2010-11-12) [3996] Tips on Tomcat - moving applications around - (2013-02-05)
Some other Articles
Wiltshire - multicultural communityIn answer to 'am I glad I started a blog' ... Save the Train - an update I'm not the father Java beans and classes, .war and .jar files Heartbeat script in Perl Well House Manor in the Snow Making a mountain out of a molehill Java Deployment course - lunch break Rail trouble forced me to buy hotel |
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 pageThis 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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