if(mi==i22)

{editor.setForeground(Color.blue);}

if(mi==i23)

{editor.setForeground(Color.green);}

if(mi==about) //帮助菜单的关于 {

String message = \记事本----\

+ \由**老师指导，***、***、**共同完成\\n感谢您的使用!\JOptionPane.showMessageDialog(JM4.this, message,

\

于...\ }

/******弹出菜单********/

if(mi==item1) //复制 {editor.copy();}

if(mi==item2) //剪切 {editor.cut();}

if(mi==item3) //粘贴 {editor.paste();} }

/**********将文件读入到编辑区***********/ void loadFile() {

JFileChooser fc=new JFileChooser(); int r=fc.showOpenDialog(this);

if(r==JFileChooser.APPROVE_OPTION)

关

} }

{

File file=fc.getSelectedFile(); catch(IOException e){}

try{editor.read(new FileReader(file),null);}

/***********创建文件写入器*************/ void saveFile() {

JFileChooser fc=new JFileChooser(); int r=fc.showSaveDialog(this);

if(r==JFileChooser.APPROVE_OPTION) } }

/*********文件的关闭或退出************/ void close(){

try{ int option = JOptionPane.showConfirmDialog( null, \是否保存文件？\保存文件？\

JOptionPane.YES_NO_CANCEL_OPTION,JOptionPane.WARNING_MESSAGE, null); switch(option) {

case JOptionPane.YES_OPTION:saveFile();break; case JOptionPane.NO_OPTION:System.exit(0);break; case JOptionPane.CANCEL_OPTION: return ; }}

catch(Exception e){e.printStackTrace();}} {

File file=fc.getSelectedFile(); catch(IOException e){}

try{editor.write(new FileWriter(file));}

void close2(){

try{int option = JOptionPane.showConfirmDialog( null, \是否保存已有文件？\保存文件？\

JOptionPane.YES_NO_CANCEL_OPTION,JOptionPane.WARNING_MESSAGE, null); switch(option) {

case JOptionPane.YES_OPTION:saveFile();editor.setText(\ case JOptionPane.NO_OPTION:editor.setText(\

catch(Exception e){e.printStackTrace();}} /******编辑区的鼠标事件*********/ public void mouseReleased(MouseEvent e) {

if(e.isPopupTrigger())

pm.show(editor,e.getX(),e.getY());

}

public void mouseClicked(MouseEvent e){} public void mouseEntered(MouseEvent e){} public void mouseExited(MouseEvent e){} public void mousePressed(MouseEvent e){}

public static void main (String[] args) { JM4 d=new JM4();} }