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Thread: Can anyone provide the program for this?

  1. #1
    Junior Member
    Join Date
    Oct 2013
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    Default Can anyone provide the program for this?

    Write a class named Triangle in Java that extends class GeometricObject. The Triangle class contains:
    Three double properties named side1, side2, and side3 with default values 1.0 to denote three sides of the triangle.
    A no-arg constructor that creates a default triangle.
    A constructor that creates a triangle with the specified side1, side2, and side3.
    The get methods for all three properties.
    A method named getArea() that returns the area of this triangle.
    o Use following formula to compute the area of a triangle.

    ​s = (side1 + side2 + side3) / 2

    A method named getPerimeter() that returns the perimeter of this triangle.
    A method named toString() that returns a string description for the triangle.
    o The toString() method is implemented as follows:
    return "Triangle: side1 = " + side1 + " side2 = " + side2 +" side3 = " + side3;

    Below is the source code for the GeometricObject class.

    public class GeometricObject {
    private String color = "white";
    private boolean filled;

    /* Default constructor */
    protected GeometricObject() {

    /* Another constructor */
    protected GeometricObject(String color, boolean filled) {
    this.color = color;
    this.filled = filled;

    public String getColor() {
    return color;

    public void setColor(String color) {
    this.color = color;

    public boolean isFilled() {
    return filled;

    public void setFilled(boolean filled) {
    this.filled = filled;
    The test class has been provided below.

    public class TestTriangle {
    public static void main(String[] args) {
    Triangle triangle = new Triangle(3, 2.5, 4);
    System.out.println("The area is " + triangle.getArea());
    System.out.println("The perimeter is " + triangle.getPerimeter());


  2. #2
    Administrator copeg's Avatar
    Join Date
    Oct 2009
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    Default Re: Can anyone provide the program for this?

    What have you tried?

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