import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.filechooser.FileFilter;
import static java.awt.event.InputEvent.*;
import java.awt.datatransfer.*;
import java.util.Enumeration;
import java.util.Hashtable;
/*import javax.swing.*;
import javax.swing.filechooser.FileFilter;
import java.awt.event.*;
import java.awt.*;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;*/
class jishiben
{
public static void main(String args[])
{
TextEdit TE=new TextEdit("记事本");
}
}
class TextEdit extends Frame implements ActionListener
{
MenuBar m;
Menu m1,m2;
MenuItem xinjian,dakai,baocun,tuichu,jianqie,fuzhi,zhantie;
TextArea text;
String filename;
FileDialog openFD,saveFD;
BufferedReader in;
FileReader read;
BufferedWriter out;
FileWriter writer;
Clipboard cb;
TextEdit(String s)
{
super(s);
m=new MenuBar();
m1=new Menu("文件");
xinjian=new MenuItem("新建");
dakai=new MenuItem("打开");
baocun=new MenuItem("保存");
tuichu=new MenuItem("退出");
m2=new Menu("编辑");
jianqie=new MenuItem("剪切");
fuzhi=new MenuItem("复制");
zhantie=new MenuItem("粘贴");
text=new TextArea();
openFD=new FileDialog(this,"打开",FileDialog.LOAD);
saveFD=new FileDialog(this,"保存",FileDialog.SAVE);
filename="NoName";
m1.add(xinjian);
m1.addSeparator();
m1.add(dakai);
m1.addSeparator();
m1.add(baocun);
m1.addSeparator();
m1.add(tuichu);
m2.add(jianqie);
m2.addSeparator();
m2.add(fuzhi);
m2.addSeparator();
m2.add(zhantie);
m.add(m1);
m.add(m2);
//关键部分，没有为cb申请内存，下面对cb操作会出错
cb = new Clipboard("nothing");
//
setMenuBar(m);
setSize(300,400);setVisible(true);
add(text,"Center");
xinjian.addActionListener(this);
dakai.addActionListener(this);
baocun.addActionListener(this);
tuichu.addActionListener(this);
jianqie.addActionListener(this);
fuzhi.addActionListener(this);
zhantie.addActionListener(this);
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==xinjian)
{
text.setText("");
}
if(e.getSource()==dakai)
{
openFD.show();
String s;
filename=openFD.getDirectory()+openFD.getFile();
if(filename!=null)
{
try
{
File file=new File(filename);
read=new FileReader(file);
in=new BufferedReader(read);
while((s=in.readLine())!=null)
text.append(s+'\n');
in.close();
read.close();
}
catch(IOException e2){}
}
}
if(e.getSource()==baocun)
{
saveFD.show();
filename=saveFD.getDirectory()+saveFD.getFile();
if(filename!=null)
{
try
{
File file=new File(filename);
writer=new FileWriter(file);
out=new BufferedWriter(writer);
out.write(text.getText(),0,(text.getText()).length());
out.close();
writer.close();
}
catch(IOException e2){}
}
}
if(e.getSource()==tuichu)
{
System.exit(0);
}
if(e.getSource()==jianqie)
{
//类text中没有cut方法，不能使用text.cut
String s=text.getSelectedText();
StringSelection select=new StringSelection(s);
cb.setContents(select,null);
text.replaceRange("",text.getSelectionStart(),text.getSelectionEnd());
}
if(e.getSource()==fuzhi)
{
//同上，没有copy这个方法
String s=text.getSelectedText();
StringSelection select=new StringSelection(s);
cb.setContents(select,null);
}
if(e.getSource()==zhantie)
{
//同上，没有paste方法
String s="";
Transferable t = cb.getContents(null);
try
{
if (t != null
&& t.isDataFlavorSupported(DataFlavor.stringFlavor))
{
// 因为原系的剪贴板里有多种信息, 如文字, 图片, 文件等
// 先判断开始取得的可传输的数据是不是文字, 如果是, 取得这些文字
s = (String)t.getTransferData(DataFlavor.stringFlavor);
// 同样, 因为Transferable中的DataFlavor是多种类型的,
// 所以传入DataFlavor这个参数, 指定要取得哪种类型的Data.
//System.out.println(s);
}
}
catch (UnsupportedFlavorException ex)
{
ex.printStackTrace();
}
catch (IOException ex)
{
ex.printStackTrace();
}
text.insert(s,text.getCaretPosition());
}
}
}
