public void action Performed(Action event e public void paint(graphics g gdraw Rect(0, 0, size width 1, size(. height-1) g drawLine(0, 0, 0, sized height) 点专此处结束放殃 4合public void actionPerformed(ActionEvent e) { } public void paint(Graphics g) { g.drawRect(0,0,size().width- 1,size().height-1); g.drawLine(0,0,0,size().height); }