Answer:
Note that, you're to replace "at" with shift 2 as the brainly text editor can't Accept the symbol
Explanation:
import java.util.ArrayList;
abstract class Shape {
private String name;
public Shape(String name) {
this.name = name;
}
public abstract double getArea();
public abstract double getPerimeter();
public String getName() {
return name;
}
}
class Circle extends Shape {
private double radius;
public Circle(String name, double radius) {
super(name);
this.radius = radius;
}
"at"Override
public double getArea() {
return Math.PI * radius * radius;
}
"at"Override
public double getPerimeter() {
// TODO Auto-generated method stub
return 0;
}
}
class Rectangle extends Shape {
private double width;
private double length;
public Rectangle(String name, double width, double length) {
super(name);
this.width = width;
this.length = length;
}
"at"Override
public double getArea() {
return width * length;
}
"at"Override
public double getPerimeter() {
// TODO Auto-generated method stub
return 0;
}
}
class Triangle extends Shape {
private double size1;
private double size2;
private double size3;
public double getSize1() {
return size1;
}
public void setSize1(double aSize1) {
size1 = aSize1;
}
public double getSize2() {
return size2;
}
public void setSize2(double aSize2) {
size2 = aSize2;
}
public double getSize3() {
return size3;
}
public void setSize3(double aSize3) {
size3 = aSize3;
}
public Triangle(String name, double size1, double size2, double size3) {
super(name);
this.size1 = size1;
this.size2 = size2;
this.size3 = size3;
}
public boolean isEquilateral() {
return (size1 == size2 && size2 == size3);
}
"at"Override
public double getArea() {
double s, area;
s = (size1 + size2 + size3) / 2;
area = Math.sqrt(s * (s - size1) * (s - size2) * (s - size3));
return area;
}
"at"Override
public double getPerimeter() {
// TODO Auto-generated method stub
return 0;
}
}
public class ShapeClient
{
public static void main(String[] args) {
ArrayList<Shape> shapeList = new ArrayList<Shape>();
Shape s1 = new Circle("circle 1", 10);
shapeList.add(s1);
Shape s2 = new Rectangle("rectangle 2", 100, 100);
shapeList.add(s2);
Shape s3 = new Triangle("Triangle 3", 11, 12, 10);// these are sides
// that need to be
Triangle t= (Triangle)(s3); // compared
if(t.getSize1()==t.getSize2() && t.getSize2()==t.getSize3()){
shapeList.add(s3); // this is where i am stuck
}
if (!s1.getClass().isInstance(s2)) {
System.out.println("Actual types of s1 and s2 are different");
}
}
}
Console X td> ShapeClient (2) Java Application] CASoft PegaEclip Actual types of s1 and s2 are different
Kindly check the image below to see the output.
