java文本编辑器
源码里有注释：import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
import javax.swing.text.*;
//简单的文本编辑器
public class Editor extends JFrame {
public JTextPane textPane = new JTextPane(); //文本窗格d，编辑窗口
public JFileChooser filechooser = new JFileChooser(); //文件选择器
public Editor()
{
super("简记");
Action[] actions=//菜单项的各种功能
{
new NewAction(),
new OpenAction(),
new SaveAction(),
new CutAction(),
new CopyAction(),
new PasteAction(),
new AboutAction(),
new ExitAction(),
new HelpAction()
};
setJMenuBar(createJMenuBar(actions));//根据actions创建菜单栏
Container container=getcontentPane();
container.add(textPane, Borderlayout.CENTER);
setSize(1300,1500);
setVisible(true);
//setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
private JMenuBar createJMenuBar(Action[] actions)//创建菜单栏的函数
{
JMenuBar menubar=new JMenuBar();
JMenu menuFile=new JMenu("文件(F)");
JMenu menuEdit=new JMenu("编辑(E)");
JMenu menuAbout=new JMenu("帮助(H)");
menuFile.add(new JMenuItem(actions[0]));
menuFile.add(new JMenuItem(actions[1]));
menuFile.add(new JMenuItem(actions[2]));
menuFile.add(new JMenuItem(actions[7]));
menuEdit.add(new JMenuItem(actions[3]));
menuEdit.add(new JMenuItem(actions[4]));
menuEdit.add(new JMenuItem(actions[5]));
menuAbout.add(new JMenuItem(actions[6]));
menuAbout.add(new JMenuItem(actions[8]));
menubar.add(menuFile);
menubar.add(menuEdit);
menubar.add(menuAbout);
return menubar;
}
class NewAction extends AbstractAction//新建
{
public NewAction()
{
super("新建(N) Ctrl+N");
}
public void actionPerformed(ActionEvent e)
{
textPane.setDocument(new DefaultStyledDocument());
}
}
class OpenAction extends AbstractAction//打开
{
public OpenAction()
{
super("打开(O) Ctrl+O");
}
public void actionPerformed(ActionEvent e)
{
int i=filechooser.showOpenDialog(Editor.this);//显示打开文件对话框
if(i==JFileChooser.APPROVE_OPTION)//点击对话框打开选项
{
File f=filechooser.getSelectedFile();//得到选择的文件
try
{
InputStream is=new fileinputstream(f);
textPane.read(is, "d");
}
catch(Exception ex)
{
ex.printstacktrace();
}
}
}
}
class SaveAction extends AbstractAction//保存
{
public SaveAction()
{
super("保存(S) Ctrl+S");
}
public void actionPerformed(ActionEvent e)
{
int i=filechooser.showSaveDialog(Editor.this);
if(i==JFileChooser.APPROVE_OPTION)
{
File f=filechooser.getSelectedFile();
try
{
Fileoutputstream out=new FileOutputStream(f);
out.write(textPane.getText().getBytes());
}
catch(Exception ex)
{
ex.printStackTrace();
}
}
}
}
class ExitAction extends AbstractAction//退出
{
public ExitAction()
{
super("退出(X)");
}
public void actionPerformed(ActionEvent e)
{
dispose();
}
}
class CutAction extends AbstractAction//剪切
{
public CutAction()
{
super("剪切(T) Ctrl+X");
}
public void actionPerformed(ActionEvent e)
{
textPane.cut();
}
}
class CopyAction extends AbstractAction//复制
{
public CopyAction()
{
super("复制(C) Ctrl+C");
}
public void actionPerformed(ActionEvent e)
{
textPane.copy();
}
}
class PasteAction extends AbstractAction//粘贴
{
public PasteAction()
{
super("粘贴(P) Ctrl+V");
}
public void actionPerformed(ActionEvent e)
{
textPane.paste();
}
}
class AboutAction extends AbstractAction
{
public AboutAction()
{
super("关于简记(A)");
}
public void actionPerformed(ActionEvent e)
{
JOptionPane.showmessageDialog(Editor.this,"实现了记事本的一些基本功能","关于",JOptionPane.PLAIN_MESSAGE);
}
}
class HelpAction extends AbstractAction
{
public HelpAction()
{
super("联系开发者");
}
public void actionPerformed(ActionEvent e)
{
JOptionPane.showMessageDialog(Editor.this,"cpeng2424@","开发者邮箱",JOptionPane.PLAIN_MESSAGE);
}
}
public static void main(String[] args)
{
new Editor();
}
}
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