支持显示编码、记录字数及快捷键等功能的Java记事本升级版

 package Jeditor;

    
  
    
  
    
 import java.awt.*;
    
 import java.awt.datatransfer.Clipboard;
    
 import java.awt.datatransfer.DataFlavor;
    
 import java.awt.datatransfer.StringSelection;
    
 import java.awt.datatransfer.Transferable;
    
 import java.awt.dnd.DnDConstants;
    
 import java.awt.dnd.DropTarget;
    
 import java.awt.dnd.DropTargetAdapter;
    
 import java.awt.dnd.DropTargetDropEvent;
    
 import java.awt.event.*;
    
 import java.io.*;
    
 import java.util.Date;
    
 import java.util.Iterator;
    
 import java.util.List;
    
 import ja