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Because my x and y is a double value, is it i can passed a double value into it? i want to be more accurate, so i want it to be a double value for x and y.

private void drawNode(double x, double y, double no, Graphics g) {
g.fillOval(x, y, 17, 17); // draw an oval which is filled with the current color
g.setColor(blue); // set current color to...