//SimplePaint.java - a program to draw with the mouse import java.awt.*; import javax.swing.*; class SimplePaint { public static void main(String[] args) { JFrame frame = new JFrame("SimplePaint"); Container pane = frame.getContentPane(); DrawingCanvas canvas = new DrawingCanvas(); PaintListener listener = new PaintListener(); canvas.addMouseMotionListener(listener); pane.add(canvas); frame.pack(); frame.show(); } }