How do I change the outline color (stroke) of my shape after drawing it? - colors

Question

I'm coding in Processing for the first time (previously familiar with Java) and I'm trying to make a grid of triangles where when I click one, it changes the fill and stroke to a different color. The fill is changing but the stroke remains the default color. Here is my code:
void setup() {
size(800, 600); // size of canvas
triangles = new ArrayList<TriangleClass>(); // Create an empty ArrayList
int L = 50; // length of triangle side
double halfStep = L * Math.sqrt(3);
// all the code about making the grid
}
void draw() {
background(0);
TriangleClass myCurrentTriangle;
for (int i = 0; i < triangles.size(); i++) {
// get object from ArrayList
myCurrentTriangle = triangles.get(i);
myCurrentTriangle.display();
}
}
void mouseClicked () {
TriangleClass myCurrentTriangle ;
for (int i=0; i < triangles.size(); i++) {
// get object from ArrayList
myCurrentTriangle = triangles.get(i);
myCurrentTriangle.mouseOver();
}
}
class TriangleClass {
double x1, y1, x2, y2, x3, y3; // points
color fill; // fill color
color stroke; // stroke color
float mouseSensorX, mouseSensorY;// check point for dist to mouse
// constructor
TriangleClass(
// ...
stroke = color(174, 208, 234);
fill = color(249, 249, 249);
mouseSensorX = (float) (x1+x2+x3 )/ 3;
mouseSensorY = (float) (y1+y2+y3 )/ 3;
}
void mouseOver() {
if (dist(mouseX, mouseY, mouseSensorX, mouseSensorY) < 17) {
if (fill == color(249, 249, 249)) {
stroke = color(251, 84, 84);
fill = color(251,84,84);
// ... repeated for other colors
}
}
void display() {
// show triangle
stroke(stroke);
fill(fill);
triangle((float) x1, (float) y1, (float) x2, (float) y2, (float) x3, (float) y3);
}
}
// =====================================================================

Answer 1

I believe the problem is the stroke weight. All you need to do it have this line of code at the end of your setup function:
strokeWeight(3);
The larger the number, the larger the outline.