Exercises, examples and other material relating to training module J715. This module is presented on Private Courses and Specially Run Courses only

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Good Programming practise - where to initialise variables It's a good idea to initialise your variables directly before you use them for the first time if you're going to use them as accumulators. By accumulator ... http://www.wellho.net/mouth/1181_Goo ... ables.html  [short article]

Build on what you already have with OO If I start recalling a "Goons" sketch, then I'll show my age .... but never mind. It was a RERUN that I saw ;-) Spike Milligan is counting votes at ... http://www.wellho.net/mouth/836_Buil ... th-OO.html  [short article]

Example object public class P3 { String Name; String Postcode; String County; String Area; P3 () { } public static P3 make(String Incoming) { if ... http://www.wellho.net/resources/ex.php4?item=j715/P3.java  [code sample]

Solution - base class (abstract) public abstract class Place { String Name; String Postcode; String County; String Area; Place () { } public static Place make(String Incoming) ... http://www.wellho.net/resources/ex.php4?item=j715/Place.java  [code sample]

Final example application import java.io.*; import java.util.*; public class MF { public static void main(String [] args) { Hashtable info = read_data("postcodes"); ... http://www.wellho.net/resources/ex.php4?item=j715/MF.java  [code sample]

Sample extended class import java.io.*; public class PF1 { public static void main(String [] args) { File Source = new File("postcodes"); if (! Source.exists()) ... http://www.wellho.net/resources/ex.php4?item=j715/PF1.java  [code sample]

Object P4 definition public class P4 { String Name; String Postcode; String County; String Area; P4 () { } public static P4 make(String Incoming) { if ... http://www.wellho.net/resources/ex.php4?item=j715/P4.java  [code sample]

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You've learnt the fundamentals of Java Ð the language itself, the structure of classes and packages, and also the use of the utility classes in java.util. Now it's time to put all the fundamental elements together in a complete example. This module is written as an exercise, with a completed sample answer.

This module is presented on Private Courses and Specially Run Courses only

Area.java	defintion of an area of the UK
District.java	definition of a district of the UK
MF.java	Final example application
Multifinder.java	Full application
P3.java	Example object
P4.java	Object P4 definition
PF1.java	Sample extended class
PF2.java	Second example application
PF3.java	Third example application
PF4.java	Final lookup on data example, ignoring area v district distinction
Place.java	Solution - base class (abstract)
Placefinde.java	Solution - application class