JavaPrimitiveData Type

Data Type : http://cs-fundamentals.com/java-programming/java-primitive-data-types.php 
Java's 8 type primitive data type

Data Type               Wrapper Class( It can be return )
int                              Integer
long                           Long
boolean                     Boolean
string                         String
double                       Double
float                           Float
byte                           Byte
short                          Short

**Data Type( No return that means void ) 
**Wrapper Class( It can be return )

*/ Boolean literals are only two logical values: true and false.
The true literal in Java does not equal 1, nor does the false literal equal 0. In Java, they can only be assigned to variables declared as boolean.

*/ Non primitive are object.

*/ Java exception handling is managed via five keywords: try, catch, throw, throws, and finally.

Data Type	Default Value (for fields)
byte	0
short	0
int	0
long	0L
float	0.0f
double	0.0d
char	'\u0000'
String (or any object)	null
boolean	false