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Java module J714
Fundamental classes
Exercises, examples and other material relating to training module J714. This topic is presented on public courses Learning to Program in Java, Java Bootcamp, Java Programming for the Web

A Java ArrayList holds an ordered sequence of items like an array, but there are differences: 1. An ArrayList has no fixed size but can be extended by ...
http://www.wellho.net/mouth/1502_Jav ... erics.html  [short article]
Learning to Program in Java - Writing Java programs for newcomers to programming. This course introduces you to programming in the Java programming language. ...
http://www.wellho.net/course/sjfull.html  [course]
Java Bootcamp - An intense course on Java programming, Servlets and JSPs This course introduces you to the Java programming language, and its Internet ...
http://www.wellho.net/course/bjfull.html  [course]
import java.util.*; public class Strtok { public static void main(String [] args) { String Demo = "This is a string that we want to tokenize"; ...
http://www.wellho.net/resources/ex.php4?item=j714/Strtok.java  [code sample]
Java Programming for the Web - Learn to write server- or client-side applications in Java. This course introduces you to the Java programming language, ...
http://www.wellho.net/course/jpfull.html  [course]
import java.util.*; import java.io.*; public class Hmap { public static void main(String [] args) throws IOException { BufferedReader Source ...
http://www.wellho.net/resources/ex.php4?item=j714/Hmap.java  [code sample]
import java.util.*; /** Using a vector*/ public class holt { public static void main(String[] args) { System.out.println("Shortened ...
http://www.wellho.net/resources/ex.php4?item=j714/holt.java  [code sample]
In Java, you can sort objects that implement the Collection interface, using either the comparable interface or a comparator class. What's the difference? ...
http://www.wellho.net/mouth/1062_Jav ... rator.html  [short article]

The java.util package contains many powerful tools for computer scientists, and is an essential element of most Java applications. You'll learn when and how to use stacks, hash tables and many other utility classes. You'll learn how to sort, how to make system calls (and why you shouldn't!), and how to find out more about your environment.

This topic is presented on public courses Learning to Program in Java, Java Bootcamp, Java Programming for the Web

Examples from our training material
About.java   System Properties
Access.java   Access Log analysis in Java - example
Acsort.java   Sorting in Java using the comparable interface
Arlist.java   ArrayList in Java
Bynum.java   A Comparator class
Discfree.java   Running an operating system command from Java
Handbag.java   A class in which descructor calls are delayed
Hmap.java   Hashmap example
Hmapsort.java   Sorting in Java - using collections
Hset.java   Hashset example
Mathop.java   Maths operations
Mhs2.java   A further example of sorting in Java
Mypocket.java   Forcing a destructor to run
Objvprim.java   Object to primitive comparison
Strtok.java   StringTokenizer example
Thing.java   Example of destructor
floater   Float object v float primitive
hinton.java   An Example of a Hashtable
holt.java   Using a Vector object
outmarsh.java   Using a stack
Background information
This module is available under an Open Training Notes License for free download from http://www.training-notes.co.uk.
Topics covered in this module
The fundamental packages.
java.lang.
java.util.
Other fundamental packages.
Data wrappers.
Why use data wrappers?.
Other methods on Float objects.
Other methods on other data wrapper objects.
java.lang.Math.
External low-level calls.
The System class - miscellaneous features.
The System class - garbage collection.
The Runtime and Process classes.
A word of caution on system classes.
Utility objects to hold multiple simple objects.
Vectors.
Stacks.
Hashes.
Enumerations.
The StringTokenizer.
Collections.
ArrayLists.
HashSets.
Iterators and general Collection interfaces.
HashMaps.
Sorting.
Basic sorting in Java.
Comparator classes.
The Comparable interface.
Complete learning
If you are looking for a complete course and not just a information on a single subject, visit our Listing and schedule page.

Well House Consultants specialise in training courses in Java,Python, Perl, PHP, and MySQL. We run Private Courses throughout the UK (and beyond for longer courses), and Public Courses at our training centre in Melksham, Wiltshire, England. It's surprisingly cost effective to come on our public courses - even if you live in a different country or continent to us.

We have a technical library of over 700 books on the subjects on which we teach. These books are available for reference at our training centre. Also available is the Opentalk Forum for discussion of technical questions.


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