import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.event.*;
import java.util.*;  //Date needed
import java.io.PrintWriter;
public class NotePad extends JFrame
{
JTextArea jta;
class newl implements ActionListener
{
  public void actionPerformed(ActionEvent e)
  {
  jta.setText("");
  }
}

class openl implements ActionListener
{ public void actionPerformed(ActionEvent e)
{
  JFileChooser jf=new JFileChooser();
  jf.showOpenDialog(NotePad.this);
 
  }
 
}
//保存文件的监听
class savel implements ActionListener
{
  public void actionPerformed(ActionEvent e)
  {
  JFileChooser jf = new JFileChooser();
  jf.showSaveDialog(NotePad.this);
 
  }
}
//打印的监听 ?
class printl implements ActionListener
{
  public void actionPerformed(ActionEvent e)
  {
  // PrintWriter p = new PrintWriter(NotePad.this);
  }
}
//退出记事本的监听
class exitl implements ActionListener
{
  public void actionPerformed(ActionEvent e)
  {
  System.exit(0);//退出
  }
}

//拷贝的监听
class copyl implements ActionListener
{
    public void actionPerformed(ActionEvent e)
    {
    jta.copy();
    }
}

//粘贴的监听
class pastel implements ActionListener
{
  public void actionPerformed(ActionEvent e)
  {
  jta.paste();
  }
}
//剪切的监听
class cutl implements ActionListener
{
  public void actionPerformed(ActionEvent e)
  {
  jta.cut();
  }
}
//查找的监听

//添加日期的监听
class datel implements ActionListener
{
  public void actionPerformed(ActionEvent e)
  {
  Date d=new Date();
  jta.append(d.toString());
  }
}


//构造函数
public NotePad()
{
  jta=new JTextArea("",24,40);
  JScrollPane jsp=new JScrollPane(jta);
  JMenuBar jmb=new JMenuBar();
  JMenu  mFile=new JMenu("File");
  JMenu mEdit=new JMenu("Edit");

  JMenuItem mNew=new JMenuItem("New",KeyEvent.VK_N);
  mNew.addActionListener(new newl());
  mFile.add(mNew);
 
  JMenuItem mOpen=new JMenuItem("Open",KeyEvent.VK_O);
  mOpen.addActionListener(new openl());
  mFile.add(mOpen);
 
  JMenuItem mSave=new JMenuItem("Save");
  mSave.addActionListener(new savel());
  mFile.add(mSave);
 
  mFile.addSeparator(); //添加分割线
 
  JMenuItem mPrint = new JMenuItem("Print");
  mPrint.addActionListener(new printl());
  mFile.add(mPrint);
 
  mFile.addSeparator(); //添加分割线
 
  JMenuItem mExit=new JMenuItem("Exit");
  mExit.addActionListener(new exitl());
  mFile.add(mExit);
  mFile.setMnemonic(KeyEvent.VK_F);

  //编辑菜单的子菜单的处理
  JMenuItem jmi;
  jmi=new JMenuItem("Copy");
  jmi.addActionListener(new copyl());
  mEdit.add(jmi);
 
  jmi=new JMenuItem("Cut");
  jmi.addActionListener(new cutl());
  mEdit.add(jmi);
 
  jmi=new JMenuItem("Paste");
  jmi.addActionListener(new pastel());
  mEdit.add(jmi);
 
  mEdit.addSeparator(); //添加分割线
 
  jmi=new JMenuItem("Find");
 
  mEdit.add(jmi);
 
  jmi=new JMenuItem("FindNext");
  mEdit.add(jmi);
  mEdit.addSeparator();
  jmi=new JMenuItem("Select All");
  mEdit.add(jmi);
  jmi=new  JMenuItem("Date/Time");
  jmi.addActionListener(new datel());
  mEdit.add(jmi);
  jmb.add(mFile);
  jmb.add(mEdit);

  this.setJMenuBar(jmb);

  this.getContentPane().add(jsp);
  this.setSize(200,200);
  this.setVisible(true);
}
//主函数，程序入口点
public static void main(String s[])
{
  new NotePad();
}