Ads:
Best selling and shopping at: ebay
Program definition:
Write a program to create abstract class shape having instance variables dim1(dimension) in double and color and two member methods: 1.void display():displays the color of the specific shape. 2.abstract void area(): gives the area for given shape.
Note:
A method for which you want to ensure that it must be overridden(In following example
area()),you can define such method as
abstract methodand class that contains one or more abstract method must be abstract class.Just put keyword
abstract to define it as abstract class
abstract class shape
{
private double dim1;
String color;
shape(double d1,String c)
{
dim1=d1;color=c;
}
void display()
{
System.out.println("Color :"+color);
}
abstract void area();
public double getdim1(){return(dim1);}
}
class triangle extends shape
{
private double dim2;//dim1=base,dim2-altitude
triangle(double d1,double d2,String c)
{
super(d1,c);
dim2=d2;
}
void area()
{
double d1=getdim1();
double a;
a =d1*dim2/2;
System.out.println("Area :"+a);
}
}
class square extends shape
{
square(double d1,String c)
{
super(d1,c);
}
void area()
{
double d1=getdim1();
double a=d1*d1;
System.out.println("Area :"+a);
}
}
class rectangle extends shape
{
private double dim2;//dim1=width,dim2=breath
rectangle(double d1,double d2,String c)
{
super(d1,c);
dim2=d2;
}
void area()
{
double d1=getdim1();
double a= d1*dim2;
System.out.println("Area :"+a);
}
}
class circle extends shape
{
circle(double d1,String c)
{
super(d1,c);
}
void area()
{
double d1=getdim1();
double pi=3.1416;
double a= 2*pi*d1;
System.out.println("Area :"+a);
}
}
class a9
{
public static void main(String args[])
{
triangle t = new triangle(2,4,"red");
t.display();
t.area();
square s = new square(4,"green");
s.display();
s.area();
rectangle r = new rectangle(4,8,"yellow");
r.display();
r.area();
circle c = new circle(6,"orange");
c.display();
c.area();
}
}
For more Assignment problems Click Here
See Also:
