Class.forName()

[Suresh Appagundi]

What makes the difference between getting the instance of the Particular
class using
Class.forName() {what is dynamic loading? how it useful?}
and
new keyword?
thanks in advance
Suresh

[Amit KumarS]

hiiiii....
as far as Class.forName() is concerned it is used to load a class at runtime. i.e. at the time of compilation we don't know which class should be loaded in memory but through programming we decide which class is to be loaded then we say
Class.forName("Foo");
this will load Foo into memory when this line is reached during runtime.
now if you want to make an instance of this at that time then you can call

 
Class.forName("Foo").newInstance(); 

now this will return an object of Class "Object" and you can typecast it to your class and then use it..
but new is used to create an object of the class when that class is already loaded in the memory. we use new for those classes which we have added in bytecode using import statement.
i hope i have answered your query.. if any doubt please revert back
Thanks
Amit

[Pradeep bhatt]

Some of the examples of dynamic classloading are JDBC drivers, Servlet instance, EJB instances etc.

[Dirk Schreckmann]

Moving this to the intermediate format...

[Jacquie Barker]

A class's byte code is loaded by the Java Virtual Machine at run time the first time an instance of that object is created using the "new" operator; but, if you want to load a class WITHOUT having to create an instance of it, Class.forName() does the trick!