SWT: A Developer's Notebook

Executing the Example

To execute the examples in this book, you will need to do one of two things—either create a runner class or include a main( ) method in each example.

How do I do that?

The first approach is to create a simple class called Runner, shown in Example 2-2.

Example 2-2. A Runner class to execute examples

public class Runner {
    
    public static void main(String[] args){
        SimpleShell ss = new SimpleShell( );        
    }
}

Each time you change the class name of the example you wish to run, you must change the name of the class that’s being instantiated in your Runner class (which is a bit of a pain, admittedly).

The second approach is to embed a main() method in each example class you create, like this:

import org.eclipse.swt.widgets.*;

public class SimpleShell {
    
     // Class body from previous lab
    public static void main(String [] args)
    {
        SimpleShell ss = new SimpleShell( );
    }
}

In this book, I will use the Runner class method so that I can keep the example code clean of code not directly related to the technique being demonstrated.

Note

If you embed a main( ) method in each class, you have to go through the process of creating a Run Configuration for each one. What a mess that is.

In Eclipse, to execute a class that contains a main( ) method you must create a Run Configuration. To do this, select Run Run from the Eclipse menu. This invokes the dialog shown in Figure 2-2.

Figure 2-2. The Eclipse ...