Abstraction

EXPLAIN ;

> Abstraction ; the process of hiding certain details and showing only essential information to the user.

EXAMPLE ;

> it shows only essential things to the user and hides the internal details, for example, sending SMS where you type the text and send.

TYPES ;

> There are two type uses in abstraction.

> Data abstraction

> process abstraction

DATA ABSTRACTION ;

> When the object data is not visible to the outer world, it creates data abstraction.

> If needed, access to the Objects’ data is provided through some methods.

PROCESS ABSTRACTION ;

> We don’t need to provide details about all the functions of an object.

> When we hide the internal implementation of the different functions involved in a user operation, it creates process abstraction.

PROGRAM ;

abstract class Bank{
abstract int Interest();
}

class SBI extends Bank{
int Interest() {

return 100;

}
}

class IOB extends Bank. {
int Interest() {

return 50;

}
}

class TestBank. {
public static void main(String args[]) {

Bank b;

b=new SBI();

System.out.println (“the Interest is:”+Interest()+” %”);

b=new IOB();

System.out.println (“the. Interest is: “+b.Interest()+” %”);

}

}

USING A DOUBLE (FOR LOOP) ;

Public class line {

Public static void main(String[]args) {

Int num = 1 ;

For(int row = 5; row>=1; row–) {

For(int col = 1; col<=1; col++) {

System.out.print(row+” “+num);

}

System.out.println();

Num++;

}

}

}

USING A DOUBLE (WHILE LOOP) ;

Public class line2 {

Public static void main (String[]args) {

Int row = 1;

While ( row <=7) {

Int col = 1 ;

While ( col <=7) {

System.out.print(col);

Col++;

}

Row++;

System.out. println(” “);

}

}

}