/**
* Test the design of Triangle class only.
*/
public class TriangleDriver{
/**
* Tests all methods in Triangle design.
* @param args A reference to a string array containing command-line
* arguments
*/
public static void main(String[] args) {
   //Declare all variables here.
   Triangle triangle1;
   Triangle triangle2;
   Triangle triangle3;
   String name1;
   double sideOne1;
   double sideTwo1;
   double sideThree1;
   double area1;
   //Create at least two valid Triangle objects.
   triangle1 = new Triangle();
   try {
         triangle1 = new Triangle("Triangle 1", 7.1, 5.9, 6.5);
   } catch (InvalidTriangleException e) {
         System.err.println(e.getMessage());
   }
   triangle2 = new Triangle();
   try {
         triangle2 = new Triangle("Triangle 2", 3.0, 4.0, 5.0);
   } catch (InvalidTriangleException e) {
         System.err.println(e.getMessage());
   }

   //Retrieve the name of first triangle, store it in memory, and print it.
   name1 = triangle1.getName();
   System.out.println("Name of first Triangle: " + name1);
   //Retrieve side one of first triangle, store it in memory, and print it.
   sideOne1 = triangle1.getSideOne();
   System.out.println("Side One of first Triangle: " + sideOne1);
   //Retrieve side two of first triangle, store it in memory, and print it.
   sideTwo1 = triangle1.getSideTwo();
   System.out.println("Side Two of first Triangle: " + sideTwo1);
   //Retrieve side three of first triangle, store it in memory, and print it.
   sideThree1 = triangle1.getSideThree();
   System.out.println("Side Three of first Triangle: " + sideThree1);

   //Change the name of the first triangle.
   triangle1.setName("Triangle 1 Modified");
   //Retrieve the name of the first triangle, store it in memory, and print it.
   name1 = triangle1.getName();
   System.out.println("Name of first Triangle: " + name1);

   //Change side one of the first triangle so that a valid triangle will be formed
   //with the new side one.
   try {
         triangle1.setSideOne(6.1);
   } catch (InvalidTriangleException e) {
         System.err.println(e.getMessage());
   }
   //Retrieve side one of the first triangle, store it in memory, and print it.
   sideOne1 = triangle1.getSideOne();
   System.out.println("Side One of first Triangle: " + sideOne1);

   //Change side one of the first triangle again so that an invalid triangle would
   //be formed and an exception be thrown.
   try {
         triangle1.setSideOne(19.9);
   } catch (InvalidTriangleException e) {
         System.err.println(e.getMessage());
   }

   //Change side two of the first triangle so that a valid triangle will be formed
   //with the new side two.
   try {
         triangle1.setSideTwo(5.4);
   } catch (InvalidTriangleException e) {
         System.err.println(e.getMessage());
   }

Week 6 Assignment Instructions: This week’s programming assignment...