class NumberListener implements ActionListener{ public void actionPerformed(ActionEvent e){ if (
class NumberListener implements ActionListener{ public void actionPerformed(ActionEvent e){ if (!append) { tf.setText("") append=true } ...
class NumberListener implements ActionListener{ public void actionPerformed(ActionEvent e){ if (!append) { tf.setText("") append=true } ...
if(e.getActionCommand()=="参数法画圆"){ p=11 } } //actionPerformed //实现接口WindowListener的所有方法,用于处理发生在窗口上的事件 public void window...