So called because this article puts together all the parts of a web service by hand so that when you use the available tools out there designed to make things easier and quicker you can work out what has gone wrong and how to fix it.
If you intend to build an application designed for more than a single user then you will need to provide a means for users to authenticate themselves. Authentication is the means for a user to provide information that allows your application to identify who you are.
The application will then typically use authorisation to check which functions and information you are allowed to access. To take a look at what is involved in an authentication system lets build a simple system to get you started.
In the previous post we looked at displaying information in a hierarchy using JTree.
Now all this is fine but, usually when we use a JTree it is because we want to be able to select an item, one or more. For our example let us concern ourselves with selecting a single item and displaying the detail associated with that item. Continue reading “Using JTree to select information”
In the last post we saw how you can easily create a JTree using an array of strings. The JTree however did not display the values in a hierarchy but displayed all the values at the same level. So in this post we will build our Java Desktop Application using JTree with a hierarchy. Continue reading “Using JTree to display a hierarchy”
JTree is a Swing class used display a tree like structure such as the one shown below.
Now unlike some of the more basic swing objects JTree is designed Continue reading “Getting started with JTree Part 1”
The other day I came across an example where a formula written in a Java program could be represented in standard notation on the screen. I thought this was brilliant. I recall back in my Uni days using the formula editor in Microsoft Word to present formulas. Now I don’t have a use for this in Java yet but, you never know. However in case anyone out there does have a requirement to represent a formula written in a programming language in standard notation then maybe this will help. Continue reading “Math Formula in Java”
One of the challenges when writing Desktop applications in Java has always been deployment. The write once run code anywhere concept has always been attractive but it has been the running of the code which has traditionally been the stumbling block.
Over the years there have been many solutions developed to overcome these challenges. Initially there was Continue reading “Java Executables”