How to return a null result??

[Yakg]

Hi, I'm writing the following method that should receive a point and bring the next one if available, from the array.
All the terms are working fine except from this one:
To return the value "null" if the point entered doesn't exist..
Does anyone knows how I do that?
Thank you.

public Point getNextVertex (int x, int y){
Point pnt = new Point (x,y);
//pnt = null;
int i=0;
while (!_vertices [i].equals (pnt) && i<MAX)
i++;
if (_vertices [i].equals (pnt) && _vertices [i+1] !=null)
pnt = _vertices [i+1];
else if (_vertices [i+1] ==null)
pnt = _vertices [0];
return pnt;
}

[Bobbo]

//pnt = null;
int i=0;
while (!_vertices [i].equals (pnt) && i<MAX) 
i++;
if (i == MAX) return null;

[Yakg]

if I enter a not valid point instead of receiving the null value

in this row:

while (!_vertices [i].equals (pnt) && i<MAX)

[SmilingKey]

have you defined MAX somewhere?

[Yakg]

yes it returns the same result also if i use the .length

[Bobbo]

Is "_vertices []" visible to this method?

[Zack]

Why not contain everything in one for loop?

public Point getNextVertex (int x, int y){
	Point pnt = new Point (x,y);
	// Don't use MAX as it doesn't necessarily change when you edit _vertices
	// Also, this loop is length-1 because you want it to not search the last item as it has no next vertex
	for (int i=0; i<_vertices.length-1; i++) {
		if (_vertices [i].equals (pnt)) { // Check if this point is equal to the one specified
			return _vertices[i+1]; // Return next point
		}
	}
	return null; // Either there is no match, or no next point
}