java文本编辑器源码

JMenuItem save=new JMenuItem("保存 ");
JMenuItem lsave=new JMenuItem("另存为");
JMenuItem tui=new JMenuItem("退出");
JMenuItem cut=new JMenuItem("剪切 ");
import javax.swing.*;
import java.awt.*;
import java.io.*;
import java.awt.event.*;
public class TxtEditor extends JFrame implements ActionListener{
JMenuItem c=new JMenuItem("斜体");
TxtEditor(){
super ("文本编辑器 By 强凯 V1.0");
//小小对话框
setBounds(250,100,700,450);
setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
deletefile();
}
else if(e.getSource()==a){
afile();
}
else if(e.getSource()==b){
bfile();
}
else if(e.getSource()==c){
open.addActionListener(this);
save.addActionListener(this);
lsave.addActionListener(this);
tui.addActionListener(this);
cut.addActionListener(this);
df.setVisible(true);
//建立新文件
File f = new File( df.getDirectory()+df.getFile() );
//得到文件名
fileName = df.getDirectory()+df.getFile();
BufferedReader bw = new BufferedReader( new FileReader(f) );
bw.read(ch);
bw.close();
openfile();
}
else if(e.getSource()==save){
savefile();
}
else if(e.getSource()==lsave){
lsavefile();
}
else if(e.getSource()==cut){
cfile();
}
else if("退出".equals(actionCommand))
System.exit(0);
}
}
// 方法定义
public void newfile(){
savefile();
optionsMenu.add(a);
optionsMenu.add(b);
optionsMenu.add(c);
cai.add(geshi);
//增加监听器
xin.addActionListener(this);
else
{
return;
}
}
});
//热键设置
xin.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,ActionEvent.CTRL_MASK));
b.addActionListener(this);
c.addActionListener(this);
// 文本框锁定
//this.setResizable(false);
}
//重写方法
public void actionPerformed(ActionEvent e){
JMenuItem copy=new JMenuItem("复制");
JMenuItem cast=new JMenuItem("粘贴");
JMenuItem delete=new JMenuItem("删除 ");
JMenuItem b=new JMenuItem("粗体");
wen.setFont(new Font("楷体" , Font.PLAIN ,20));
// wen.setBackground(Color.blue);
// add(x);
//菜单栏的创建
JMenuBar cai=neme;
String file_dir;
String tempString;
//上次保存后的文件名和地址
String fileName = "";
JPanel x=new JPanel();
JTextArea wen=new JTextArea(20,50);
//用此文件的长度建立一个字符数组 （特别标注）
char ch[] = new char [(int)f.length()];
//异常处理
try
{
//读出数据，并存入字符数组ch中
JMenuItem ziti=new JMenuItem("字体");
JMenuItem a=new JMenuItem("普通");
//定义菜单项
JMenuItem xin=new JMenuItem("新建");
JMenuItem open=new JMenuItem("打开");
String actionCommand=e.getActionCommand();
if(e.getSource()instanceof JMenu);
{
if(e.getSource()==xin){
newfile();
}
else if(e.getSource()==open){
open.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,ActionEvent.CTRL_MASK));
save.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,ActionEvent.CTRL_MASK));
copy.addActionListener(this);
cast.addActionListener(this);
delete.addActionListener(this);
ziti.addActionListener(this);
a.addActionListener(this);
jian.addSeparator( );
jian.add(tui);
cai.add(jian);
JMenu bian= new JMenu("编辑 ");
bian.add(cut);
bian.add(copy);
bian.add(cast);
if(option==JOptionPane.YES_OPTION)
if(e.getWindow() == TxtEditor.this)
{
System.exit(0);
}
cutfile();
}
else if(e.getSource()==copy){
copyfile();
}
else if(e.getSource()==cast){
castfile();
}
else if(e.getSource()==delete){
bian.add(delete);
cai.add(bian);
JMenu geshi = new JMenu ("格式");
JMenu optionsMenu=new JMenu("字体");
geshi.add(optionsMenu);
this.setJMenuBar(cai);
cai.setOpaque(true);
JMenu jian=new JMenu("文件");
jian.add(xin);
jian.add(open);
jian.add(save);
jian.add(lsave);
wen.setText(null);
fileName = "";
}
//打开
public void openfile(){
String fileName = null;
FileDialog df = new FileDialog(this,"打开文件",FileDialog.LOAD);
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e) {
int option= JOptionPane.showConfirmDialog(
TxtEditor.this, "你真的想退出吗... ", "系统和你对话 ",JOptionPane.YES_NO_OPTION);