public void checkCollision() {
    for (int i = 0; i < objects.size(); i++) {
        for (int j = i + 1; j < objects.size(); j++) {

            // the code does get here!

            Object_Shell o1 = objects.get(i);
            Object_Shell o2 = objects.get(j);
            if ((o1.collisionArea.intersects(o2.collisionArea))
                    || (o2.collisionArea.intersects(o1.collisionArea))) {
                System.out.println("checkcollision");
                // LINE ABOVE DOESN'T DETECT ANY COLLISIONS
                // THE ISSUE HAS TO BE HERE, BECAUSE I HAVE CREATED A FEW GAMES WITH THE SAME
                // CODE YOU DO NOT SEE AND ALL THE INTERSECT STUFF IS THE SAME
                if ((o1 instanceof Protagonist && o2 instanceof Block)
                        || (o2 instanceof Protagonist && o1 instanceof Block)) {
                    System.out.println("Protagonist & Block");
                    Protagonist charlie = (o1 instanceof Protagonist) ? (Protagonist) o1 : (Protagonist) o2;
                    Block cubicon = (o1 instanceof Block) ? (Block) o1 : (Block) o2;
                    // if (cubicon.hardness == 0) {
                    //
                    // }
                    charlie.speedThroughBlock = 10 - cubicon.hardness;
                    // charlie.yspeed = charlie.speedThroughBlock;
                    if (charlie.xspeed != 0) {
                        if (charlie.xspeed > 0) {
                            charlie.xspeed -= charlie.speedThroughBlock;
                        } else if (charlie.xspeed < 0) {
                            charlie.xspeed += charlie.speedThroughBlock;
                        }
                    }
                    if (charlie.yspeed != 0) {
                        if (charlie.yspeed > 0) {
                            charlie.yspeed -= charlie.speedThroughBlock;
                        } else if (charlie.yspeed < 0) {
                            charlie.yspeed += charlie.speedThroughBlock;
                        }
                    }
                }
            }
        }
    }
}