Assignment 3: The Triangle Class

PROBLEM DESCRIPTION:

1- Design a class named Triangle that extends GeometricObject. The class contains:

Three double data fields named side1, side2, and side3 with default values 0 to denote three sides of the triangle (6 points).

A no-arg constructor that creates a default triangle. (6 points)

A constructor that creates a triangle with the specified side1, side2, side3, and the String color, and boolean filled. Make sure you use the super() method. (16 points)

The accessor methods for all five data fields used for the non-def constructor. (10 points)

A method named getArea() that returns the area of this triangle. (8 points)

A method named getPerimeter() that returns the perimeter of this triangle. (8 points)

A method named toString() that returns a string description for the triangle. (6 points)

For the formula to compute the area of a triangle, see Exercise 5.19. The toString() method is implemented as follows:

return "Triangle: side1 = " + side1 + " side2 = " + side2 + " side3 = " + side3;

IMPLEMENT THE CLASS:

2- Write a test program TestTriangle.java that creates a Triangle object:

with sides 1, 1.5, 1

color = yellow

filled = true (10 points)

displays its area (2.5 points)

displays its perimeter(2.5 points)

displays its color (2.5 points)

displays whether it is filled or not (2.5 points)

Files to be submitted:

a- GeometricObject.java(20 points) b- Triangle.java c- TestTriangle.java