java程序编写的记事本

importjava.io.*;importjava.text.DateFormat;importjava.util.*;importjava.awt.*;importjava.awt.List;importjava.awt.datatransfer.*;importjava.awt.event.*;importjava.awt.print.*;importjavax.swing.*;publicclassNotepadextendsJFrameimplementsActionListener{JTextAreatextArea;FileDialogfileDialog;Stringf