JAVA Data Abstraction

Data Abstraction:

The illustration of essential features without including the background details or explanations is known as abstraction. Using abstract classes or interfaces can hide internal implementation details.

Real time example:

The real life example for abstraction is considering TV remote. When you press any button in remote some functions are processed on TV. For that you no need not know internal work process.

5. Basic Data types

Depends on the data types the memory will be allocated by operating system. There are two types available in the java.

1. Primitive data types – byte, short, int, float, long, double, char

2. Non – primitive data types – string, arrays, class

Primitive data types:

Example:

{`class Sample
{  ;
public static void main(String[] args)
{  ;
float num1 = 15.68f;
System.out.println(num1);
&};
&};
`}

Output:

15.68

Literals:

It is fixed value that is assign to the variable in the program. There are many literals available using primitive data types.

Example:

Integer literals: Int num1=10;

Character literals: char ch = ‘a’;

Float literals: float num1 =14.5;