2030Writtentest1.txt

public class Triangle {
	
	double s1, s2, s3;	
	//remember the throws part
	public Triangle(double s1, double s2, double s3) throws InvalidSidesException {
		if(((s1 + s2) > s3) || ((s1 + s3) > s2) || ((s3 + s2) > s1)){
			this.s1 = s1;
			this.s2 = s2;
			this.s3 = s3;
		}
		throw new InvalidSidesException("Invalid");	
	}
}

/**************************************************************/

CORRECT:
class TriangleCollector {
	Triangle[] triangles;
	int numberOfTriangles;

	TriangleCollector() {
		triangles = new Triangle[10];
	}

	void addTriangle(double side1, double side2, double side3)
	throws InvalidSidesException {
		Triangle t = new Triangle(side1, side2, side3);
		triangles[numberOfTriangles] = t;
		numberOfTriangles ++;
	}
}

/********************************************************/

class TriangleCollectorTester {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
/* Your answer starts from here... */

TriangleCollector tc = new TriangleCollector();
boolean exit1 = false;

while( exit1 == false) {
	sysout("Enter the first side: ");
	double s1 = input.nextDouble;
	sysout("Enter the 2nd side: ");
	double s2 = input.nextDouble;
	sysout("Enter the 3rd side: ");
	double s3 = input.nextDouble;
	try{
		tc.addTriangle(s1,s2,s3);
		sysout("A triangle with sides " + s1 + " " + s2 + " " + s3 + " is added.");
	} catch (InvalidSidesException e) {
		exit1 = true;
		sysout("Invalid sides: " + s1 + " " + s2 + " " + s3);
		sysout("Bye!");
	}

}


}
}

/*******************************************************/
WRONG:
void addTriangle(double side1, double side2, double side3){
	Triangle[] collection;
	int num = 0;
	try{
		Triangle(side1, side2, side3);
		if(collection.length < 11){
			Triangle[num] = Triangle(side1, side2, side3); 
			num++;
		}
		
	}catch(InvalidSidesException e) {
		System.out.println("Invalid");
	}
}