This post starts with the question – how the callback method is called in Eclipse Platform.
Short answer is: call back method is called by host plug-in.
The example used is from a previous post which is about creating a sample plugin with a menu through plug-in wizard. I believe anyone who have played a little bit with plug-in has used it before.
This example shows how IAdaptable is used in Eclipse in a real example. To get a taste of how Adapter design pattern works in Eclipse, go to those posts: post1 post2. Suppose you have created a view by using eclipse “Extension wizard”. (If you do not know this, try to play around and get this … Read more
Adapter Design Pattern How Adapter design pattern is used in Eclipse platform? Eclipse Platform Runtime has a good example of this pattern. First of all, Adapter design pattern has a simple idea behind – wrapping the object and making it to be compatible to another interface clients expect. You can take a look at the … Read more
Adapter pattern is frequently used in modern Java frameworks. It comes into place when you want to use an existing class, and its interface does not match the one you need, or you want to create a reusable class that cooperates with unrelated classes with incompatible interfaces. 1. Adapter pattern story The Adapter idea can … Read more
This code is for showing how to sort a Double LinkedList in Java. You can use sort(List<T> list) method. It will sort the double list in ascending order. If you want to sort it in descending order, you can use sort(List<T> list, Comparator<? super T> c) . public static void main(String[] args) { LinkedList<Double> doubleList … Read more
By using the Eclipse plugin wizard, it takes no time to get a working sample plugin. Here is one I did for getting a menu. How an eclipse plugin works can be illustrated in this simple example. Activator class is the start point of the plugin. Activator class is loaded initially and if you look … Read more
To start the research of frameworks, we need to understand what is a framework and why it is created. Here we only focus on Java frameworks. One of the most significant characters of Frameworks that differ from other regular libraries is called “Reversion of Control”. When we write a java program, there is always a … Read more
Here is a good site about Spring MVC. http://maestric.com/doc/java/spring/hello_world I guess this is the right way to make a tutorial. While there are so many posts out there talking about Spring MVC examples, sample applications or tutorials, there is still a reason to make a new one. This is a good example that can make … Read more
Why do we still need Spring Web Flow while we have good web frameworks already?
Spring Web Flow(SWF) focus entirely on the definition and execution of complex conversation in a web application, i.e. web application page flow.
Here is a Java puzzle from Neal Gafter’s presentation. Which one is correct, a, b, c or d? The answer is d. There are 3 defects in this program: 1. Apparently, there is no “break” in the switch statement. 2. nextInt(2) will only return 0 or 1. 3. ‘P’, ‘G’, ‘M’ are Chars, not Strings. … Read more
Here I summarize the design patterns used in Eclipse platform. Understanding design patterns used in Eclipse is the key for understanding Eclipse platform. Eclipse architecture has a clear layered structure. Each layer is independent to each other but interactive with each other. To better understand a framework, it is a good idea to start from … Read more
Problem: When try to store Chinese to mysql database, ??? was stored.
Solution:
– set names utf8;
– set character set utf8;
– set database field’s Collation to be “utf8_general_ci”
You may be curious about how a framework works? A simple framework example will be made here to demonstrate the idea of frameworks. Goal of a Framework First of all, why do we need a framework other than just a normal library? The goal of framework is defining a process which let developers implement certain … Read more
What is the difference between a Java Library and a framework? The two concepts are important but sometimes confusing for Java developers. 1. Key Difference and Definition of Library and Framework The key difference between a library and a framework is “Inversion of Control”. When you call a method from a library, you are in … Read more