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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 Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own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))
Splitting Java strings and extracting numbers

In Java you can use packages in the utility class to handle strings, or you can use methodsin java.lang.String which has been enhanced from version to version and now includes methods such as String.split().

Examples from today's course - taking a line of data (which could have been read from a file) and splitting it into elements which are then used to perform a calculation. [here].

That's a useful piece of code - but we've mixed up the logic of extracting the data and doing the calculation with the main program - not a good idea for the future extensibiity. So I refactored the example above - passing the string into a factory within a class to extract the data from it, and return me an object. I then ran a couple of methods on the object to do calculations that had been in the main code. Neat. Source [here].within a class to extract the data from it, and return me an object. I then ran a couple of methods on the object to do calculations that had been in the main code. Neat. Source [here].

Output ... in BOTH cases:

  trainee@kingston:~/2015$ java Station
  Swanseahas grown to a factor 1.5598733
  trainee@kingston:~/2015$


So we're seeing a growth in traffic at Swansea station from 2005 to 2013 of 55.9%
(written 2015-01-13, updated 2015-01-15)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
J707 - Java - Strings
  [1446] An answer to a student asking 'Help' - (2007-11-27)
  [1557] Trying out our Java examples on our web site - (2008-02-27)
  [2649] Length, size or capacity in Java? - (2010-02-24)
  [3048] String handling - from first steps to practical examples - (2010-11-13)
  [4414] Java - converting an integer to a fixed length string - (2015-02-04)


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TransWilts / Press and Publicity report for AGM / 30th January 2015
Java Utility class - flexible replacement for array. Also cacheing in objects and multiple catch clauses example.
Preparing data through a little bit of Perl
Philosophy behind object design - and how I applied in to a Java example
Splitting Java strings and extracting numbers
Interview conditions,and other instructions to staff
Refactoring Perl applications to give them a rosy future
Checking MySQL database backups have worked (not failed)
Cucumber example - test::unit, scenario outlines, datafile driven test
Global Regular Expression matching in Ruby (using scan)
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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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