diff --git a/nullnull b/nullnull
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/src/WENBEN/MainTextEditor.java b/src/WENBEN/MainTextEditor.java
new file mode 100644
index 0000000000000000000000000000000000000000..c36c8e2bf6d3bd369a38c6c9a9a688550357d335
--- /dev/null
+++ b/src/WENBEN/MainTextEditor.java
@@ -0,0 +1,6 @@
+package WENBEN;
+public class MainTextEditor {
+public static void main(String args[]) {
+	new TextEditor();
+}
+}
diff --git a/src/WENBEN/TextEditor.java b/src/WENBEN/TextEditor.java
new file mode 100644
index 0000000000000000000000000000000000000000..91870080de92b80ba68754ceb1ac443f7101b629
--- /dev/null
+++ b/src/WENBEN/TextEditor.java
@@ -0,0 +1,420 @@
+package WENBEN;
+import javax.swing.*;
+import java.awt.event.*;
+import java.io.*;
+import java.awt.*;
+import javax.swing.undo.*;
+import javax.swing.event.DocumentListener;
+import javax.swing.event.UndoableEditEvent;
+import javax.swing.event.UndoableEditListener;
+public class TextEditor extends JFrame implements ActionListener,MouseListener{
+	JTextArea area;//文本编辑区
+	JLabel statusLabel;//状态栏标签
+	String tempString;
+	String fileName="";
+	
+	JPopupMenu youjian;//右键弹出快捷键菜单
+	//右键弹出快捷菜单的菜单项
+	JMenuItem che=new JMenuItem("撤销(U)");
+	JMenuItem jian=new JMenuItem("剪切(T)");
+	JMenuItem fu=new JMenuItem("复制(C)");
+	JMenuItem zhan=new JMenuItem("粘贴(P)");
+	JMenuItem shan=new JMenuItem("删除(D)");
+	JMenuItem quan=new JMenuItem("全选(A)");
+	
+	JMenuBar menubar; //菜单条
+	JMenu wenjian,bianji,geshi,chakan,bangzhu;//菜单
+	//菜单项
+	JMenuItem xinjian=new JMenuItem("新建(N)");
+	JMenuItem dakai=new JMenuItem("打开(O)...");
+	JMenuItem baocun=new JMenuItem("保存(S)");
+	JMenuItem lingcunwei=new JMenuItem("另存为(A)...");
+	JMenuItem tuichu=new JMenuItem("退出(X)");
+	JMenuItem chexiao=new JMenuItem("撤销(U)");
+	JMenuItem jianqie=new JMenuItem("剪切(T)");
+	JMenuItem fuzhi=new JMenuItem("复制(C)");
+	JMenuItem zhantie=new JMenuItem("粘贴(P)");
+	JMenuItem shanchu=new JMenuItem("删除(L)");
+	JCheckBoxMenuItem huanhang=new JCheckBoxMenuItem("自动换行(W)");
+	JCheckBoxMenuItem zhuangtai=new JCheckBoxMenuItem("状态栏(S)");
+	JMenuItem ckbz=new JMenuItem("查看帮助(H)");
+	JMenuItem guanyu=new JMenuItem("关于记事本(A)");
+
+	//构造空文件
+     public TextEditor() {
+		init();
+		setLocation(100,100);
+		setSize(650,550);
+		setVisible(true);
+		setDefaultCloseOperation(DISPOSE_ON_CLOSE);
+	}
+     //构造制定文件名的文件
+     public TextEditor(String filename) {
+ 		init();
+ 		setLocation(100,100);
+ 		setSize(650,550);
+ 		setVisible(true);
+ 		setDefaultCloseOperation(DISPOSE_ON_CLOSE);
+ 	}
+	//布局页面
+	void init() {
+	setTitle("记事本 ");
+	menubar=new JMenuBar();
+	setJMenuBar(menubar);//将菜单条放置到窗口
+   
+	//菜单：文件
+	wenjian=new JMenu("文件(F)");
+	menubar.add(wenjian);//将菜单放置到菜单条中
+	wenjian.add(xinjian);
+	wenjian.add(dakai);
+	wenjian.add(baocun);
+	wenjian.add(lingcunwei);
+	wenjian.add(tuichu);//将菜单项放置到菜单中
+	xinjian.addActionListener(this);
+	dakai.addActionListener(this);
+	baocun.addActionListener(this);
+	lingcunwei.addActionListener(this);
+	tuichu.addActionListener(this);//菜单项添加监视器
+	xinjian.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,ActionEvent.CTRL_MASK));
+	dakai.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,ActionEvent.CTRL_MASK));
+	baocun.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,ActionEvent.CTRL_MASK));
+	lingcunwei.setAccelerator(KeyStroke.getKeyStroke('A'));
+	tuichu.setAccelerator(KeyStroke.getKeyStroke('X'));//设置快捷键
+	
+	//菜单：编辑
+	bianji=new JMenu("编辑(E)");
+	menubar.add(bianji);//将菜单放置到菜单条中
+	bianji.add(chexiao);
+	bianji.add(jianqie);
+	bianji.add(fuzhi);
+	bianji.add(zhantie);
+	bianji.add(shanchu);//将菜单项放置到菜单中
+	chexiao.addActionListener(this);
+	jianqie.addActionListener(this);
+	fuzhi.addActionListener(this);
+    zhantie.addActionListener(this);
+	shanchu.addActionListener(this);//菜单项添加监视器
+	chexiao.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z,ActionEvent.CTRL_MASK));
+    jianqie.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,ActionEvent.CTRL_MASK));
+	fuzhi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,ActionEvent.CTRL_MASK));
+	zhantie.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,ActionEvent.CTRL_MASK));//设置快捷键
+	
+	//菜单：格式
+	geshi=new JMenu("格式(O)");
+	menubar.add(geshi);//将菜单放置到菜单条中
+	geshi.add(huanhang);//将菜单项放置到菜单中
+	huanhang.addActionListener(this);//菜单项添加监视器
+	
+	//菜单：查看
+	chakan=new JMenu("查看(V)");
+	menubar.add(chakan);//将菜单放置到菜单条中
+	chakan.add(zhuangtai);//将菜单项放置到菜单中
+	zhuangtai.addActionListener(this);//菜单项添加监视器
+	zhuangtai.setState(true);
+	
+	//菜单：帮助
+	bangzhu=new JMenu("帮助(H)");
+	menubar.add(bangzhu);//将菜单放置到菜单条中
+	bangzhu.add(ckbz);
+	bangzhu.add(guanyu);//将菜单项放置到菜单中
+	ckbz.addActionListener(this);
+    guanyu.addActionListener(this);//菜单项添加监视器
+	
+    //创建文本编辑区和添加滚动条
+    area=new JTextArea(20,50);
+    JScrollPane scroller=new  JScrollPane(area);
+    add(scroller,BorderLayout.CENTER);//添加
+    area.addMouseListener(this);//文本编辑区添加监视器
+    
+    //右键弹出快捷键菜单
+    youjian=new JPopupMenu();
+    youjian.add(che);
+    youjian.add(jian);
+    youjian.add(fu);
+    youjian.add(zhan);
+    youjian.add(shan);
+    youjian.add(quan);//将菜单项放置到菜单中
+    youjian.addSeparator();//弹出式菜单加上分隔线
+    che.addActionListener(this);
+    jian.addActionListener(this);
+    fu.addActionListener(this);
+    zhan.addActionListener(this);
+    shan.addActionListener(this);
+    quan.addActionListener(this);//右键菜单项添加监视器
+    
+    //注册右键弹出快捷键事件
+    area.addMouseListener(new MouseAdapter()
+    {public void mousePressed(MouseEvent e) {
+    	if(e.isPopupTrigger()){
+        	youjian.show(e.getComponent(),e.getX(),e.getY());
+        	}
+    	checkEnabled();
+    	area.requestFocus();
+    }
+    public void mouseReleased(MouseEvent e) {
+    	if(e.isPopupTrigger()){
+        	youjian.show(e.getComponent(),e.getX(),e.getY());
+        	}
+    	checkEnabled();
+    	area.requestFocus();
+    }
+    });
+	}
+
+
+	//判定剪切、复制、删除是否可用（是否选择内容）
+	public void checkEnabled() {
+		String selectText=area.getSelectedText();
+		if(selectText==null)
+		{jianqie.setEnabled(false);
+		 jian.setEnabled(false);
+		 fuzhi.setEnabled(false);
+		 fu.setEnabled(false);
+		 shanchu.setEnabled(false);
+		 shan.setEnabled(false);
+		}
+		else 
+		{jianqie.setEnabled(true);
+		 jian.setEnabled(true);
+		 fuzhi.setEnabled(true);
+		 fu.setEnabled(true);
+		 shanchu.setEnabled(true);
+		 shan.setEnabled(true);
+		}
+    }
+	//重写方法
+	public void mouseClicked(MouseEvent me1) {}
+	public void mousePressed(MouseEvent me2) {}
+	public void mouseReleased(MouseEvent me3) {}
+	public void mouseEntered(MouseEvent me4) {}
+	public void mouseExited(MouseEvent me5) {}
+
+	//设置事件发生
+	public void actionPerformed(ActionEvent e) {
+	//新建
+		if(e.getSource()==xinjian) {
+		area.requestFocus();
+		area.replaceRange("", 0, area.getText().length());
+		fileName="";
+		}
+	//打开
+		else if(e.getSource()==dakai) {
+			area.requestFocus();
+			String fileName=null;
+			FileDialog df=new FileDialog(this,"打开文件",FileDialog.LOAD);
+			df.setVisible(true);
+			File f=new File(df.getDirectory()+df.getFile());
+			fileName=df.getDirectory()+df.getFile();
+			char ch[]=new char[(int)f.length()];
+			try
+			{
+				BufferedReader bw=new BufferedReader(new FileReader(f)); 
+				bw.read(ch);
+				bw.close();
+			}
+			catch(FileNotFoundException fe) {
+				System.out.println("文件不存在");
+				System.exit(0);
+			}
+			catch(IOException ie){
+				System.out.println("文件异常");
+				System.exit(0);
+			}
+			String s=new String(ch);
+			area.setText(s);
+		}
+    //保存
+		else if(e.getSource()==baocun) {
+			  boolean isNewFile=true;//判断是否保存过
+			  if(isNewFile) {         //未保存过
+			  FileDialog fd = new FileDialog(this, "保存", FileDialog.SAVE); 
+			  fd.addWindowListener(new WindowAdapter() {
+				  public void windowClosing(WindowEvent ee) {
+					  System.exit(0);
+				  }
+			  });
+			  fd.setVisible(true);
+			  String s=area.getText();
+			  try
+				{
+					File f=new File(fd.getDirectory()+fd.getFile());
+					BufferedWriter bw=new BufferedWriter(new FileWriter(f));
+					bw.write(s,0,s.length());
+					bw.close();
+				}
+			  catch(FileNotFoundException fe1) {  //若文件不存在，抛出FileNotFoundException异常
+					System.out.println("文件不存在");
+					System.exit(0);
+			  }
+			  catch(IOException ie1)
+			  {
+				System.out.println("文件异常");
+				System.exit(0);
+			  }
+			  }
+			  else {              //保存过
+				String s=area.getText();
+			  try
+			  {	String fileName=null;
+				File f=new File(fileName);
+				BufferedWriter bw=new BufferedWriter(new FileWriter(f));
+				bw.write(s,0,s.length());
+				bw.close();
+			}
+			  catch(FileNotFoundException fe1) {  //若文件不存在，抛出FileNotFoundException异常
+					System.out.println("文件不存在");
+					System.exit(0);
+			  }
+			  catch(IOException ie1)
+			  {
+				System.out.println("文件异常");
+				System.exit(0);
+			  }
+		}
+		}		
+	 //另存为
+		else if(e.getSource()==lingcunwei) {
+			area.requestFocus();
+			FileDialog fd = new FileDialog(this, "另存为", FileDialog.SAVE);
+			/*创建具有指定标题的文件对话框窗口(FileDialog)。
+			 * FileDialog(Dialog parent, String title, int mode) 
+               parent - 对话框的所有者
+		       title - 对话框的标题
+		       mode - 对话框的模式，FileDialog.LOAD（打开） 或 FileDialog.SAVE（保存） 
+			*/
+			fd.addWindowListener(new WindowAdapter() 
+				{public void windowClosing (WindowEvent eee) {
+					System.exit(0);
+				}
+			});
+			fd.setVisible(true);
+			String s=area.getText();
+			try
+			{
+				File f=new File(fd.getDirectory()+fd.getFile());
+				BufferedWriter bw=new BufferedWriter(new FileWriter(f));
+				bw.write(s,0,s.length());
+				bw.close();
+			}
+			catch(FileNotFoundException fe2) {  //若文件不存在，抛出FileNotFoundException异常
+				System.out.println("文件不存在");
+				System.exit(0);
+			}
+			 catch(IOException ie2)
+			  {
+				 System.out.println("文件异常");
+				System.exit(0);
+			  }
+		}	
+		
+		
+	 //退出
+		else if(e.getSource()==tuichu) {
+	    int exitChoose=JOptionPane.showConfirmDialog(this,"确定要退出吗?","退出提示",JOptionPane.OK_CANCEL_OPTION);  
+	    if(exitChoose==JOptionPane.OK_OPTION) {   
+	    	System.exit(0); }  
+	    else {   return;  }                 
+		}
+	//撤销
+		else if(e.getSource()==chexiao||e.getSource()==che) {
+			area.requestFocus();	
+			UndoManager undo= new UndoManager();
+			 if(undo.canUndo())  
+	            {   try  
+	                {   undo.undo();  
+	                }  
+	                catch (CannotUndoException ex)  
+	                {   System.out.println("无法撤销" + ex);  
+	                    //ex.printStackTrace();  
+	                }  
+	            }  
+	            if(!undo.canUndo())  
+	                {  chexiao.setEnabled(false);
+	                   che.setEnabled(false);
+	                }  
+		}
+    //剪切
+		else if(e.getSource()==jianqie||e.getSource()==jian) {
+			area.requestFocus();//设置焦点
+			tempString=area.getSelectedText();//获取文本框中的文本
+			StringBuffer temp=new StringBuffer(area.getText());//StringBuffer是字符串变量，它的对象是可以扩充和修改的。
+			int start=area.getSelectionStart();
+			int len=area.getSelectedText().length();
+			temp.delete(start,start+len);
+			/**
+			*删除选定内容StringBuffer delete(int start, int end)	
+			*删除当前StringBuffer对象中以索引号start开始，到end结束的子串
+			*/
+			area.setText(temp.toString());//setText(String text)，在文本框中设置文本
+			checkEnabled();
+		}
+	 //复制
+		else if(e.getSource()==fuzhi||e.getSource()==fu){
+			area.requestFocus();
+		    tempString=area.getSelectedText();
+			checkEnabled();
+		}
+	//粘贴
+		else if(e.getSource()==zhantie||e.getSource()==zhan) {
+			int start=area.getSelectionStart();
+			StringBuffer temp=new StringBuffer(area.getText());
+			temp.insert(start, tempString);
+			/**
+			 * StringBuffer insert(int offset, char c)
+			 * 在当前StringBuffer对象中插入一个元素，在索引号offset处插入相应的值。
+			 */
+			area.setText(temp.toString());
+			checkEnabled();
+		}
+	 //删除
+		else if(e.getSource()==shanchu||e.getSource()==shan) {
+			StringBuffer temp=new StringBuffer(area.getText());//StringBuffer是字符串变量，它的对象是可以扩充和修改的。
+			int start=area.getSelectionStart();
+			int len=area.getSelectedText().length();
+			temp.delete(start,start+len);
+			area.setText(temp.toString());
+			checkEnabled();
+		}
+	//全选
+        else if(e.getSource()==quan) {
+		area.selectAll();	
+		}
+	//自动换行
+		else if(e.getSource()==huanhang) {
+		if(huanhang.getState())  
+           area.setLineWrap(true);  
+        else   
+            area.setLineWrap(false);  
+		}
+	 //状态栏
+		else if(e.getSource()==zhuangtai) {
+			if(zhuangtai.getState()) {
+				statusLabel.setVisible(true);}
+			else {
+			statusLabel.setVisible(false);
+			statusLabel=new JLabel("按F1获取帮助");  
+		    this.add(statusLabel,BorderLayout.SOUTH);
+		}
+		}
+	//查看帮助
+	   else if(e.getSource()==ckbz) {
+		   TextEditor h=new TextEditor("帮助文档.txt");
+	        h.setSize(400,500);
+		}
+	//关于记事本功能
+		else if(e.getSource()==guanyu) {
+			JDialog dialog1;
+			JLabel label1;
+			dialog1=new JDialog(this,"关于记事本");
+			dialog1.setSize(480,150);
+			label1=new JLabel("",JLabel.CENTER);
+			dialog1.add(label1);
+			dialog1.setDefaultCloseOperation(HIDE_ON_CLOSE);
+            dialog1.setLocation(250,330);
+            dialog1.setVisible(true);
+		}
+	}
+	
+}
+	
+