Exercise - 5
a)Implementing Single Inheritance
AIM: To write a JAVA program to implement Single Inheritance
SOURCE-CODE:
class A
{
A()
{
System.out.println("Inside A's Constructor");
}
}
class B extends A
{
B()
{
System.out.println("Inside B's Constructor");
}
}
class singledemo
{
public static void main(String args[])
{
B b1=new B();
}
}
OUT-PUT:
Inside A's Constructor
Inside B's Constructor
b)Multi level Inheritance
AIM: To write a JAVA program to implement multi level Inheritance
SOURCE-CODE:
class A
{
A()
{
System.out.println("Inside A's Constructor");
}
}
class B extends A
{
B()
{
System.out.println("Inside B's Constructor");
}
}
class C extends B
{
C()
{
System.out.println("Inside C's Constructor");
}
}
class multidemo
{
public static void main(String args[])
{
C c1=new C();
}
}
OUT-PUT:
Inside A's Constructor
Inside B's Constructor
Inside C's Constructor
c)Abstract Class
AIM: To write a java program for abstract class to find areas of different shapes
SOURCE-CODE:
abstract class shape
{
abstract double area();
}
class rectangle extends shape
{
double l=12.5,b=2.5;
double area()
{
return l*b;
}
}
class triangle extends shape
{
double b=4.2,h=6.5;
double area()
{
return 0.5*b*h;
}
}
class square extends shape
{
double s=6.5;
double area()
{
return 4*s;
}
}
class shapedemo
{
public static void main(String[] args)
{
rectangle r1=new rectangle();
triangle t1=new triangle();
square s1=new square();
System.out.println("The area of rectangle is: "+r1.area());
System.out.println("The area of triangle is: "+t1.area());
System.out.println("The area of square is: "+s1.area());
}
}
OUT-PUT:
The area of rectangle is: 31.25
The area of triangle is: 13.65
The area of square is: 26.0
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