上接<java记事本程序(二)>,记得回复哦!!嘿嘿

 //下面两个方法实现剪切版与此程序的数据交换
 protected static String getClipboardText(Clipboard clip) throws Exception
 {
  // 获取剪切板中的内容
  Transferable clipT = clip.getContents(null);
  if (clipT != null)
  {
   // 检查内容是否是文本类型
   if (clipT.isDataFlavorSupported(DataFlavor.stringFlavor))
   {
    return (String)clipT.getTransferData(DataFlavor.stringFlavor);
   }
  }
  return null;
 }
 protected static void setClipboardText(Clipboard clip, String writeMe)
 {
  Transferable tText = new StringSelection(writeMe);
  clip.setContents(tText, null);
 }

 //实现键盘事件
 public void keyTyped(KeyEvent key)
 {
  
 }
 public void keyPressed(KeyEvent key)
 {
  //int row=1,colum=1;
  if(key.getKeyCode()==KeyEvent.VK_ENTER)  //如果回车则行值加1
  {
   row++;
   colum=1;
   //lab_statusBar2.setText("字节数: "+(text.getText().length()-1)+"个");
  }
  else
  {
   colum++;
   //lab_statusBar2.setText("行 "+row+" 列 "+colum+"  字节数: "+text.getText().length());
  }
 }
 public void keyReleased(KeyEvent key)
 {
 
 }
 
 //下面为鼠标事件,主要是鼠标在菜单上的动作事件
 public void mouseClicked(MouseEvent mouse)
 {
  
 }
 public void mousePressed(MouseEvent mouse)
 {
  if(mouse.getSource()==text && mouse.getButton()==MouseEvent.BUTTON3 )
  {
    PopuMenu popu=new PopuMenu();
    popu.show((Component)text, mouse.getX(), mouse.getY());
  }
 }
 public void mouseReleased(MouseEvent mouse)
 {
 
 }
 public void mouseEntered(MouseEvent mouse)
 {
  //以下为鼠标移到下列组件上进产生的事件
  if(mouse.getSource()==menu1)
  {
   menu1.setBorder(BorderFactory.createLineBorder(Color.blue));
  }
  else if(mouse.getSource()==menu2)
  {
   menu2.setBorder(BorderFactory.createLineBorder(Color.blue));
  }
  else if(mouse.getSource()==menu3)
  {
   menu3.setBorder(BorderFactory.createLineBorder(Color.blue));
  }
  else if(mouse.getSource()==menu4)
  {
   menu4.setBorder(BorderFactory.createLineBorder(Color.blue));
  }
  else if(mouse.getSource()==menu5)
  {
   menu5.setBorder(BorderFactory.createLineBorder(Color.blue));
  }
 }
 public void mouseExited(MouseEvent mouse)
 {
  //鼠标移出组件时恢复先前设置
  menu1.setBorder(BorderFactory.createLineBorder(Color.white));
  menu2.setBorder(BorderFactory.createLineBorder(Color.white));
  menu3.setBorder(BorderFactory.createLineBorder(Color.white));
  menu4.setBorder(BorderFactory.createLineBorder(Color.white));
  menu5.setBorder(BorderFactory.createLineBorder(Color.white));
 }
 
 //下面是主方法
 public static void main(String [] args)
 {
  new NotePad3();
  new AboutNote();
 }
 
 
 //程序中的公有变量如下:
 private static int row=1,colum=1;
 private static int r=255,g=255,b=0;
 private static