Perimeter and Area
unknown
plain_text
2 months ago
3.9 kB
2
Indexable
Never
public class Checkvalidate { private Scanner scanner; public Checkvalidate() { scanner = new Scanner(System.in); } public double getDoubleInput() { double Input; while (true) { // Start an infinite loop to keep asking for input until a valid value is provided. try { Input = Double.parseDouble(scanner.nextLine()); // Read the user's input and parse it as an integer. if (Input > 0) { break; // if size > 0 , valid value and loop break } else { System.err.println("You have to input a positive number , Reinpiut : "); // iff size <= 0 , Display notice } } catch (NumberFormatException e) { System.err.println("Invalid value , Reinput : "); // if users input a special character , program will notice to users } } return Input; } public boolean isRectangleValid(double width, double length) { if (width > length) { System.err.println("Invalid Rectangle."); return false; } return true; } public boolean isTriangleValid(double sideA, double sideB, double sideC) { if (sideA + sideB <= sideC || sideA + sideC <= sideB || sideB + sideC <= sideA) { System.err.println("Invalid Triangle."); return false; } return true; } } public class Main { public static void main(String[] args) { System.out.println("Please input side Width of Rectangle : "); Checkvalidate width = new Checkvalidate(); double Width = width.getDoubleInput(); System.out.println("Please input side Length of Rectangle : "); Checkvalidate length = new Checkvalidate(); double Length = length.getDoubleInput(); while (!width.isRectangleValid(Width, Length)) { System.out.println("Please input side Width of Rectangle: "); Width = width.getDoubleInput(); System.out.println("Please input side Length of Rectangle: "); Length = length.getDoubleInput(); } System.out.println("Please input side radius of Circle :"); Checkvalidate radius = new Checkvalidate(); double Radius = radius.getDoubleInput(); System.out.println("Please input side sideA of Triangle :"); Checkvalidate sideA = new Checkvalidate(); double SideA = sideA.getDoubleInput(); System.out.println("Please input side sideB of Triangle :"); Checkvalidate sideB = new Checkvalidate(); double SideB = sideB.getDoubleInput(); System.out.println("Please input side sideA of Triangle :"); Checkvalidate sideC = new Checkvalidate(); double SideC = sideC.getDoubleInput(); while (!sideA.isTriangleValid(SideA, SideB, SideC)) { System.out.println("Please input side sideA of Triangle: "); SideA = sideA.getDoubleInput(); System.out.println("Please input side sideB of Triangle: "); SideB = sideB.getDoubleInput(); System.out.println("Please input side sideC of Triangle: "); SideC = sideC.getDoubleInput(); } System.out.println("-----Rectangle-----"); Rectangle rectangle = new Rectangle(Width, Length); rectangle.printResult(); System.out.println("-----Circle-----"); Circle circle = new Circle(Radius); circle.printResult(); System.out.println("-----Triangle-----"); Triangle triangle = new Triangle(SideA, SideB, SideC); triangle.printResult(); } }