java programming

> Please give me difference between class and Class

what exactly are you referring to?

> Can i store non-primitive type of a field ,class in a class?

yes

public class A
{
   private B field;
}

class it can be variable name.

class is a keyword used to declare a java class.
Class is a inbuild class in java.lang package

class  is used in two places
either declaring a class
like
public class A
{
   private B field;
}

or it can be used to get the class object of an object :)
like this
obj.class.getName();

Class is a class in java.lang package
"Instances of the class Class represent classes and interfaces in a running Java application"

>class it can be variable name.

NO. It's a java keyword and indicate to declare a class.

Class (with C uppercase) is a particular class used into java program. See here the doc:
http://java.sun.com/j2se/1.4.2/docs/api/java/lang/Class.html

>class it can be variable name.
wrong comment from me apologize for tht

>>Can i store non-primitive type of a field ,class in a class?  

Alternatively, if you mean this, then you can

public class A {
    private Class clazz;
}

The member variables (fields) can be of type primitives, or a particular class.
The class java.lang.Class is no different to any other class in this respect.

What the class java.lang.Class provides is details about a particula java class.