what are the primitives and wrapper classes in java 3f

1In Java, for each Primitive type, there is a matching class type.
2  We call them Wrapper classes:
3	Primitive types are the most basic data types
4    available within the Java language. 
5	There are 8: boolean , byte , char , short ,
6                  int , long , float and double . 
7	These types serve as the building blocks of
8    data manipulation in Java.
9	Wrapper classes: Byte, Short, Integer, Long,
10                 Float, Double, Boolean, Character
11			
12	All the wrapper classes are subclasses
13    of the abstract class Number. 
14	The object of the wrapper class contains or
15      wraps its respective primitive data type. 
16	Converting primitive data types into object
17    is called boxing, and this is taken care by the compiler.
18			
19			Differences: 
20				1. Wrappers classes are object 
21				2. null can only be assigned to classes
22				3. Wrapper class does have methods
23				4. Primitives does have default values
24						default value of primitives:  
25								 byte, short, int, long ==> 0
26								 float, double ==> 0.0;
27								 boolean ==> false;
28								 char ==> space		 
29				5. Default values of wrapper class: null
30