Overview Create a Java class called Triangle that when used

Overview:

Create a Java class called Triangle that when used with the supplied driver TestTriangle.java displays some properties of your triangle.

Do not change any of the code in TestTriangle.java.

Specications

Create a Java class le called Triangle.java that creates a Triangle object that stores the following information:
• Length of side 1,
• Length of side 2,
• Length of side 3, and
• A scanner object for input.

When the buildTriangle() method is invoked, ask the user to input the lengths of the three sides of a triangle. After receiving the three values, your program should provide answers for each of the following questions:

• Is it really a triangle? If one side is longer than the sum of the other two sides, then it is not.
• Is it a right triangle? That is, does it satisfy the Pythagorean Theorem?
• Is it an equilateral triangle? That is, are all three sides the same?
• Is it an isosceles triangle? That is, are two sides the same? (If your program has already determined that the triangle is equilateral, then it should NOT state that it is isosceles.)
• What is the area of the triangle? Use ps(s a)(s b)(s c), where s =1/ 2 perimeter.
• What is the perimeter of the triangle?

Notes/Hints

You should break up your program into multiple methods. I have provided you with templates for
• The default constructor Triangle()
• The public method buildTriangle()
• The private method getSide(int index)

It remains for you to write the code for the following public methods

• classifyTriangle()
• perimeter()
• area()

Below are some general hints/tips for completing this project.

• It may be easiest to deal with sorted values in the classifyTriangle() method. I recommend sorting the values in the

          buildTriangle() method after you have received a value for each of the sides.

• Real numbers should be represented as doubles
• Java has a built in function called Math.sqrt()

EXAMPLE OUTPUT

Welcome to the Triangle Program

Please enter the length of side 1: bob

You did not enter a valid input . Exiting .

Welcome to the Triangle Program

Please enter the length of side 1: 3

Please enter the length of side 2: 4

Please enter the length of side 3: 5

My analysis of this t r i a n g l e i s
This i s a right t r i a n g l e

The area of the t r i a n g l e i s 6.00.

The perimeter of the t r i a n g l e i s 12.0.

Welcome to the Triangle Program

Please enter the length of side 1: 10

Please enter the length of side 2: 2

Please enter the length of side 3: 7

My analysis of this t r i a n g l e i s

Not a t r i a n g l e

Welcome to the Triangle Program

Please enter the length of side 1: 6

Please enter the length of side 2: 6

Please enter the length of side 3: 8

My analysis of this t r i a n g l e i s

This i s NOT a right t r i a n g l e

This i s an i s o s c e l e s t r i a n g l e

The area of the t r i a n g l e i s 17.9.

The perimeter of the t r i a n g l e i s 20.0.

Welcome to the Triangle Program

Please enter the length of side 1: 4

Please enter the length of side 2: 9

Please enter the length of side 3: 6

My analysis of this t r i a n g l e i s

This i s NOT a right t r i a n g l e

The area of the t r i a n g l e i s 9.56.

The perimeter of the t r i a n g l e i s 19.0.

IMPORTANT:

Below is the code needed for TestTriangle.java

This code must be used in this program

public class TestTriangle {
public static void main(String[] args) {
    System.out.println(\"Welcome to the Triangle Program\");
    System.out.println();

    Triangle myTriangle = new Triangle();
    myTriangle.buildTriangle();

    System.out.println();
    System.out.println(\"My analysis of this triangle is\");
    System.out.println();

    myTriangle.classifyTriangle();

    String prettyPerim = String.format(\"%.3g\", myTriangle.perimeter());
    String prettyArea = String.format(\"%.3g\", myTriangle.area());

    System.out.println(\"\\tThe area of the triangle is \" + prettyArea + \".\");
    System.out.println(\"\\tThe perimeter of the triangle is \" + prettyPerim + \".\");
}

Solution

public class Triangle

{

private double side1;

private double side2

private double side3;

private Scanner s;

Triangle()

{}

public void buildTriangle()

{

s=new Scanner(System.in);

System.out.println(\"enter side 1 length :\");

side1=s.nextDouble();

System.out.println(\"enter side2 length :\");

side2=s.nextDouble();

System.out.println(\"enter side3 length :\");

side3=s.nextDouble();

}

public void classifyTriangle()

{

if(side1==side2&&side2==side3)

System.out.println(\"equilateral triangle\");

else if((side1*s ide1==side2*side2+side3*side3)||(side2*s ide2==side1*s ide1+side3*side3)||(side3*s ide3<=side1*s ide1+side2*side2))

System.out.println(\"right angled triangle \");

else if(side1==side2||side2==side3||side3==side1)

System.out.println(\"isosceles triangle\");

else if((side1<=side2+side3)||(side2<=side1+side3)||(side3<=side1+side2))

System.out.println(\"scalene triangle \");

else

System.out.println(\"not a triangle\");

}

public double perimeter()

{

return side1+side2+side3;

}

public double area()

{

double s=(side1+side2+side3)/2;

return sqrt(s*(s-side1)*(s-side2)*(s-side3);

}

public void getSide(int index)

{

s=new Scanner(System.in);

System.out.println(\"enter length of side \"+index+\" : \");

if(index==1)

side1=s.nextDouble();

if(index==2)

side2=s.nextDouble();

if(index==3)

side3=s.nextDouble();

}

}