Polygonz

Polygon.java

public class Polygon
{
	// define fields here
    private int numvertices;
    Point[] vertices;

	public Polygon(int numvertices)
	{
		this.numvertices = numvertices;
        this.vertices = new Point[numvertices];
	}

	public boolean setVertex(int vertexnumber, Point p)
	{
        System.out.println(numvertices);
        if (vertexnumber >= numvertices) {
            return false;
        }
        else if (vertexnumber < 0) {
            return false;
        }
        else {
            vertices[vertexnumber] = p;
            System.out.println(java.util.Arrays.toString(vertices));
            return true;
        }
	}

	public double getPerimeter()
	{
        double total = 0.0;
        for (int i=0; i<vertices.length; i++) {
            int j = i + 1;
            if (j == vertices.length) {
                j = 0;
            }
            
            total = total + vertices[i].distanceTo(vertices[j]);
        }
        return total;
	}

	public double getArea()
	{
		return 0.0; // replace this line with your code
	}
}

PolygonTest.java

public class PolygonTest {
    
    public static void main(String[] args) {
        Polygon foo = new Polygon(3);
        System.out.println(foo.getPerimeter());
        
        foo.setVertex(0, new Point(3, 1));
        foo.setVertex(1, new Point(3, 4));
        foo.setVertex(2, new Point(5, 1));
        
    }
    
}