Java：Canvas.drawline，如何画一条粗线

Question

Im trying to draw a lightning bolt on my canvas but the line is only one pixel wide. How can I make the line thicker?

 canvas.drawLine(lightningBoltArray[i].startXArray[k],lightningBoltArray[i].startYArray[k],lightningBoltArray[i].endXArray[k],lightningBoltArray[i].endYArray[k],paintHalfAlpha);

Is the trick somewhere in the settings of the applied paint?

Answer 1

If you're not doing something that allows you do to this you're probably painting incorrectly. Assuming that this is in a JPanel instance. It will also work for paint(Graphics g) in Canvas but most painting in Java is done using Swing

public void paintComponent(Graphics g) {
   super.paintComponent(g);
   Graphics2D g2d = (Graphics2D) g;
   // other stuff
   float width = 3f;
   BasicStroke stroke = new BasicStroke(width);
   g2d.setStroke(stroke);
   g2d.drawLine(...);
   // more stuff
}