一个简单的记事本

/**

* <p>Title: </p>

* <p>Description: </p>

* <p>Copyright: Copyright (c) 2003</p>

* <p>Company: </p>

* @author not attributable

* @version 1.0

*/

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.event.*;

import java.io.*;

public class tj {

String title="ERROR MESSAGE";

int type=JOptionPane.ERROR_MESSAGE;

public tj() {

final JFrame frame = new JFrame("My Edit");

final JTextArea text=new JTextArea();

frame.setSize(600, 500);

frame.addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

System.exit(0);

}});

JPanel panel=new JPanel();

panel.setLayout(new GridLayout(1,1));

panel.add(new JScrollPane(text));

frame.getContentPane().add(panel);

JMenuBar Mbar = new JMenuBar();

frame.setJMenuBar(Mbar);

JMenu jfile = new JMenu("File");

JMenu jedit = new JMenu("Edit");

JMenu jhelp = new JMenu("Help");

Mbar.add(jfile);

Mbar.add(jedit);

Mbar.add(jhelp);

JMenuItem jnew = new JMenuItem("New");

jnew.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

text.setText(" ");

}});

jnew.setMnemonic('N');

jnew.setAccelerator( KeyStroke.getKeyStroke('N',java.awt.Event.CTRL_MASK,true));

JMenuItem jopen = new JMenuItem("Open");

jopen.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

JFileChooser openfile=new JFileChooser();

openfile.setDialogTitle("open file");

openfile.setApproveButtonText("open");

openfile.showOpenDialog(frame);

File file=openfile.getSelectedFile();

FileInputStream inputfile=null;

String message="The file not Found";

try{

inputfile=new FileInputStream(file);

}

catch(FileNotFoundException fe)

{

JOptionPane.showMessageDialog(frame,message,title,type);

}

int readbytes;

String message1="read file error";

try{

while((readbytes=inputfile.read())!=-1)

{

text.append(String.valueOf((char)readbytes));

}

}

catch(IOException ioe)

{

JOptionPane.showMessageDialog(frame,message1,title,type);

}

String closemessage="close stream error";

try{

inputfile.close();

}

catch(IOException ioe)

{

JOptionPane.showMessageDialog(frame,closemessage,title,type);

}

}});

jopen.setMnemonic('O');

jopen.setAccelerator(KeyStroke.getKeyStroke('O',java.awt.Event.CTRL_MASK,true));

JMenuItem jsave = new JMenuItem("Save");

jsave.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

JFileChooser savefile=new JFileChooser();

savefile.setApproveButtonText("save");

savefile.setDialogTitle("save file");

savefile.showSaveDialog(frame);

File filesa=savefile.getSelectedFile();

String messagef="File not Found";

FileOutputStream outputfile=null;

try{

outputfile=new FileOutputStream(filesa);

}

catch(FileNotFoundException fe)

{

JOptionPane.showMessageDialog(frame,messagef,title,type);

}

String filecontent=text.getText();

String wrmessage="write error";

try

{

outputfile.write(filecontent.getBytes());

}

catch(IOException ioe)

{

JOptionPane.showMessageDialog(frame,wrmessage,title,type);

}

String cmessage="close stream error";

try{

outputfile.close();

}

catch(IOException ioe)

{

JOptionPane.showMessageDialog(frame,cmessage,title,type);

}

}});

jsave.setMnemonic('S');

jsave.setAccelerator(KeyStroke.getKeyStroke('S',java.awt.Event.CTRL_MASK,true));

JMenuItem jquite = new JMenuItem("Quite");

jquite.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

System.exit(0);

}});

jquite.setMnemonic('Q');

jquite.setAccelerator(KeyStroke.getKeyStroke('Q',java.awt.Event.CTRL_MASK,true));

JMenuItem jfind = new JMenuItem("Find");

jfind.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

}});

jfind.setMnemonic('F');

jfind.setAccelerator(KeyStroke.getKeyStroke('F',java.awt.Event.CTRL_MASK,true));

JMenuItem jcut = new JMenuItem("Cut");

jcut.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

text.cut();

}});

jcut.setMnemonic('C');

jcut.setAccelerator(KeyStroke.getKeyStroke('C',java.awt.Event.CTRL_MASK,true));

JMenuItem jcopy = new JMenuItem("Copy");

jcopy.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

text.copy();

}});

jcopy.setMnemonic('o');

jcopy.setAccelerator(KeyStroke.getKeyStroke('O',java.awt.Event.CTRL_MASK,true));

JMenuItem jpaste = new JMenuItem("Paste");

jpaste.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

text.paste();

}});

jpaste.setMnemonic('P');

jpaste.setAccelerator(KeyStroke.getKeyStroke('P',java.awt.Event.CTRL_MASK,true));

JMenuItem jiami = new JMenuItem("Jiami");

jiami.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

}});

JMenuItem jabout = new JMenuItem("About");

jabout.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

int type=JOptionPane.INFORMATION_MESSAGE;

String title="About";

String message="The software is writed by Yangwencheng";

JOptionPane.showMessageDialog(frame,message,title,type);

}});

jfile.add(jnew);

jfile.add(jopen);

jfile.add(jsave);

jfile.addSeparator();

jfile.add(jquite);

jedit.add(jcut);

jedit.add(jcopy);

jedit.add(jpaste);

jedit.add(jfind);

jedit.add(jiami);

jhelp.add(jabout);

frame.setVisible(true);

}

public static void main(String[] args) {

tj tj1 = new tj();

}

}