how to know the type of primitive variables in java code example

Example 1: how to check type of primitive value in java

int i = 20;
float f = 20.2f;
System.out.println(((Object)i).getClass().getName());
System.out.println(((Object)f).getClass().getName());

Example 2: what are the primitive types java

Primitive types are the most basic data
types available within the Java language. 
Some of them are boolean , byte , char ,
short , int , long , float and double . 
These types serve as the building blocks
of data manipulation in Java.