Applied Enterprise JavaBeans™ Technology

D.3. Dynamic instantiation

You will undoubtedly be familiar with the standard technique for instantiating new classes in Java, which is

MyClass myObject = new MyClass(); 

This causes MyClass to be initialized, and an instance of this class to be created. Java also provides a mechanism for instantiating classes dynamically—that is, where information about the class is provided at runtime. Using the techniques described above, we can get a Class reference to a class identified only by its name, and then instantiate it by calling newInstance() on the Class. For example:

Class class = Class.forName(”com.something.MyClass”); 
com. something.MyClass myObject = class.newInstance(); 

This will cause the class’s default constructor to be executed (if ...