Beginner Java Programming

//Triangle.java from Lab 2

public class Triangle extends GeometricObject { //A no-arg constructor public Triangle() { super(); side1 = 0.0; side2 = 0.0; side3 = 0.0; } //set methods to default value of 1.00 double side1 = 1.0; double side2 = 1.0; double side3 = 1.0; //constructor that creates a rectangle with the specified sides public Triangle(double a, double b, double c, String color, boolean filled) { super(color, filled); side1 = a; side2 = b; side3 = c; } //getter & setter methods for data public double getSide1() { return side1; }

public void setSide1(double side1) { this.side1 = side1; }

public double getSide2() { return side2; } public void setSide2(double side2) { this.side2 = side2; } public double getSide3() { return side3; } public void setSide3(double side3) { this.side3 = side3; } public void show() { System.out.println(side1+","+side2+","+side3+","); } //method to calculate area public double getArea(){ double s=(side1+side2+side3)/2; double area=s*(s-side1)*(s-side2)*(s-side3); return area; } //method to calculate perimeter public double getPerimeter(){ return (side1 + side2 + side3); } //toString method public String toString(){ return "Triangle: side1 = " + side1 + " side2 = " + side2 + " side3 = " + side3 +" "+ super.toString(); } }

//GeometricObject.java, don't know if you need this but triangle class extends to this class

public class GeometricObject { private String color; private boolean filled; public GeometricObject() { color = "green"; filled = true; } public GeometricObject(String color, boolean filled) { this.color = color; this.filled = filled; } //Getter & Setter color method public String getColor() { return color; } public void setColor(String color) { this.color = color; } //Getter method for filled (Since filled is boolean getter method name is isFilled) public boolean isFilled() { return filled; } //Setter filled method public void setFilled(boolean filled) { this.filled = filled; } //String representation of object public String toString() { return "Color: " + color + " and Filled: " + filled; } }

Make a copy of your Triangle class for Lab 2 and then make the following two modifications. First, add this requirements to the Triangle constructor : make sure that the sum of any two sides is greater than the third side. If not, throw an IllegalTriangle Exception. The constructor header can be like this: public Triangle (double sidel, double side2, doube side3) throws IllegalTriangleException Implement this requirement. Secondly, in your test program, prompt for each of the value sidel, side2 and side3 in a method and each time throw a InputMismatchException if the wrong data type is entered from the keyboard. Then also entered invalid values such that it will throw the IllegalTriangleException error as explained above