import java.applet.*; import java.awt.*; import ACG; public class RandomNumbers extends RandomApplet { public synchronized void redrawImage() { super.redrawImage(); drawMiddle(); repaint(); } public void drawMiddle() { Graphics g = imageBuffer.getGraphics(); g.setColor(Color.black); int midLine = imageBufferSize.width / 2; g.fillRect(midLine - 2, 0, 4, 10); g.fillRect(midLine - 2, imageBufferSize.height - 10, 4, 10); } }