JAVA记事本的源代码

Question

RT 请帮忙

Answer 1

我给你如下：/*
* WriteBoard.java
*
* Created on 2006年12月19日, 下午7:26
*/

/**
*
* @author LecH.giF
*/
import java.awt.datatransfer.*;
import java.awt.event.*;
import java.awt.*;
import java.io.*;
import java.awt.FileDialog;
public class WriteBoard extends java.awt.Frame {
Clipboard clipboard =null;
FileDialog fc = new FileDialog(this);

/** Creates new form WriteBoard */
public WriteBoard() {
clipboard = getToolkit().getSystemClipboard();
initComponents();
}

/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
// <editor-fold defaultstate="collapsed" desc=" Generated Code ">
private void initComponents() {
textArea1 = new java.awt.TextArea();
menuBar1 = new java.awt.MenuBar();
menu1 = new java.awt.Menu();
menuItem1 = new java.awt.MenuItem();
menuItem2 = new java.awt.MenuItem();
menuItem3 = new java.awt.MenuItem();
menuItem4 = new java.awt.MenuItem();
menuItem5 = new java.awt.MenuItem();
menu2 = new java.awt.Menu();
menuItem6 = new java.awt.MenuItem();
menuItem7 = new java.awt.MenuItem();
menuItem8 = new java.awt.MenuItem();

setTitle("WriteBoard");
addWindowListener(new java.awt.event.WindowAdapter() {
public void windowClosing(java.awt.event.WindowEvent evt) {
exitForm(evt);
}
});

add(textArea1, java.awt.BorderLayout.CENTER);

menu1.setLabel("Menu");
menuItem1.setLabel("\u65b0\u5efa");
menuItem1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
newText(evt);
}
});

menu1.add(menuItem1);

menuItem2.setLabel("\u6253\u5f00");
menuItem2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
open(evt);
}
});

menu1.add(menuItem2);

menuItem3.setLabel("\u4fdd\u5b58");
menuItem3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
menuItem3ActionPerformed(evt);
}
});

menu1.add(menuItem3);

menuItem4.setLabel("\u53e6\u5b58\u4e3a");
menuItem4.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
menuItem4ActionPerformed(evt);
}
});

menu1.add(menuItem4);

menuItem5.setLabel("\u9000\u51fa");
menuItem5.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
exit(evt);
}
});

menu1.add(menuItem5);

menuBar1.add(menu1);

menu2.setLabel("\u7f16\u8f91");
menuItem6.setLabel("\u526a\u5207");
menuItem6.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
menuItem6ActionPerformed(evt);
}
});

menu2.add(menuItem6);

menuItem7.setLabel("\u590d\u5236");
menuItem7.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
menuItem7ActionPerformed(evt);
}
});

menu2.add(menuItem7);

menuItem8.setLabel("\u7c98\u8d34");
menuItem8.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
menuItem8ActionPerformed(evt);
}
});

menu2.add(menuItem8);

menuBar1.add(menu2);

setMenuBar(menuBar1);

pack();
}// </editor-fold>

private void menuItem4ActionPerformed(java.awt.event.ActionEvent evt) {
fc.show();

if(fc.getFile()!=null){

File file = new File(fc.getFile());

try {
PrintWriter pw = new PrintWriter(file);
pw.print(textArea1.getText());
pw.flush();
pw.close();

} catch (FileNotFoundException ex) {
ex.printStackTrace();
}
}

else{
return;
}
}

private void menuItem3ActionPerformed(java.awt.event.ActionEvent evt) {
fc.show();
if(fc.getFile()!=null){

File file = new File(fc.getFile());

try {
PrintWriter pw = new PrintWriter(file);
pw.print(textArea1.getText());
pw.flush();
pw.close();

} catch (FileNotFoundException ex) {
ex.printStackTrace();
}
}

else{
return;
}
}

private void menuItem8ActionPerformed(java.awt.event.ActionEvent evt) {
Transferable contents = clipboard.getContents(this);
DataFlavor flavor = DataFlavor.stringFlavor;
if(contents.isDataFlavorSupported(flavor))
try{
String str;
str=(String)contents.getTransferData(flavor);
textArea1.append(str);
}catch(Exception e){}
}

private void menuItem7ActionPerformed(java.awt.event.ActionEvent evt) {
String temp = this.textArea1.getSelectedText();
StringSelection text = new StringSelection(temp);

clipboard.setContents(text,null);
}

private void menuItem6ActionPerformed(java.awt.event.ActionEvent evt) {
String temp = this.textArea1.getSelectedText();
StringSelection text = new StringSelection(temp);
clipboard.setContents(text,null);
int start = textArea1.getSelectionStart();
int end = textArea1.getSelectionEnd();
textArea1.replaceRange("",start,end);
}

private void open(java.awt.event.ActionEvent evt) {
fc.show();
if(fc.getFile()!=null){

File file = new File(fc.getFile());
try {
FileReader fr = new FileReader(file);
BufferedReader br = new BufferedReader(fr);
String s;
try {
while((s= br.readLine())!=null){
textArea1.append(s+"\n");
}
fr.close();
br.close();
} catch (IOException ex) {
ex.printStackTrace();
}

} catch (FileNotFoundException ex) {
ex.printStackTrace();
}

}
else{
return;
}
}

private void newText(java.awt.event.ActionEvent evt) {
this.textArea1.setText("");
}

private void exit(java.awt.event.ActionEvent evt) {
System.exit(0);
}

/** Exit the Application */
private void exitForm(java.awt.event.WindowEvent evt) {
System.exit(0);
}

/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new WriteBoard().setVisible(true);
}
});
}

// Variables declaration - do not modify
private java.awt.Menu menu1;
private java.awt.Menu menu2;
private java.awt.MenuBar menuBar1;
private java.awt.MenuItem menuItem1;
private java.awt.MenuItem menuItem2;
private java.awt.MenuItem menuItem3;
private java.awt.MenuItem menuItem4;
private java.awt.MenuItem menuItem5;
private java.awt.MenuItem menuItem6;
private java.awt.MenuItem menuItem7;
private java.awt.MenuItem menuItem8;
private java.awt.TextArea textArea1;
// End of variables declaration

}

Answer 2

import java.awt.*;
import java.awt.event.*;

public class TestMenu {
public static void main (String[] args) {
new MenuFrame("新建"+" "+"文本文档"+".txt"+" "+"-"+" "+"记事本").launchFrame();
}
}
class MenuFrame extends Frame {
MenuBar mb = null;
MenuFrame (String s) {
super (s);
}
public void launchFrame() {
Menu file = new Menu ("文件");
Menu edit = new Menu ("编辑");
Menu format = new Menu ("格式");
Menu help = new Menu ("帮助");
MenuItem newItem = new MenuItem ("新建");
newItem.addActionListener (new ActionListener () {
public void actionPerformed(ActionEvent e) {
final Frame ff = new Frame ("记事本");
ff.setMenuBar(mb);
ff.setBounds (300,300,400,200);
ff.setVisible (true);
ff. addWindowListener (new WindowAdapter () {
public void windowClosing(WindowEvent e) {
ff.setVisible (false);
}
} );
}
});
MenuItem saveItem = new MenuItem ("保存");
MenuItem exitItem = new MenuItem ("退出");
MenuItem helpTitle = new MenuItem ("帮助主题");
MenuItem line = new MenuItem ("-");
MenuItem about = new MenuItem ("关于记事本");
MenuItem copy = new MenuItem ("粘贴");
MenuItem serach = new MenuItem ("查找");
edit.add (copy);
edit.add (serach);
help.add (helpTitle);
help.add (line);
help.add (about);
exitItem.addActionListener (new ActionListener () {
public void actionPerformed(ActionEvent e) {
System.exit (0);
}
} );
file.add (newItem);
file.add (saveItem);
file.add (exitItem);
mb = new MenuBar();
mb.add (file);
mb.add (edit);
mb.add (format);
mb.add (help);
addWindowListener (new WindowAdapter () {
public void windowClosing(WindowEvent e) {
System.exit (0);
}
} );
setLayout (new FlowLayout());
setMenuBar (mb);
setBounds (300,300,400,200);
setVisible (true);
}
}本回答被提问者和网友采纳

Answer 3

在安装java下的目录Java\jdk1.6.0_04\demo\jfc\Notepad有一个样板程序,源码在src下