记事本java代码程序图,java写记事本程序

使用记事本编写JAVA程序,并运行输出结果,具体的实现步骤是什么?

1、首先在电脑中新建一个记事本，将记事本的后缀改为“.java”，如下图所示。

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2、然后使用记事本的方式打开，输入java程序代码，如下图所示。

3、接着在键盘上按“win+R”快捷键键打开运行，输入“cmd”，如下图所示。

4、在命令行输入“D:”，按“Enter”键进去D盘，再输入“cd Desktop”进去Desktop文件夹，如下图所示。

5、最后再输入“javac Test.java”，按“Enter”键编译java程序，如下图所示就完成了。

电脑怎么用记事本写Java程序并运行？

1. 新建一个记事本，后缀名是 .java ；然后在里面写一段java的代码，如图：

2.把写好的java文件丢进D盘，就是第一步给出的那个class文件；

3. 打开dos界面开始-〉运行-〉cmd-〉这个是命令行模式,选择D盘，如图：

4.选择D盘之后，在命令提示符中输入“javac 文件名.java”,我的文件名为java，所以输入javac java.java然后回车，等待编译。这时候你就会发现它提示说javac不是内部文件。接下来就是java环境变量设置的问题了；

5.下载一个jdk执行默认安装。例如我下的jdk版本是： jdk-6u10-rc2-bin-b32-windows-i586-p-12_sep_2008.exe；

6.配置环境：右击我的电脑点属性，进去点高级就能看到环境变量。点进去就能设置你的系统变量了，如图：

6-1。变量名：classpath 变量值：(.;C:\Program Files\Java\jdk1.6.0_10\lib;)括号里面都是（主要我们在编译运行程序的时候通过classpath可以帮助我们找到一些需要的系统类，“.”号是表示当前路径；“;”号是用来隔开多个变量值，如果你的系统里面已经有classpath环境变量，就不用新建了，直接加“;”号，在后面加新值）；如图所示

如何用JAVA编写简单的记事本程序？

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.event.*;

import java.io.*;

import java.awt.datatransfer.*;public class NewEdit

{

public static void main(String args[])

{

MyFrame EditFrame=new MyFrame();

EditFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

EditFrame.setVisible(true);

}

}class MyFrame extends JFrame

{

public MyFrame()

{ Dimension screenSize=toolKit.getScreenSize();

int screenHeight=screenSize.height;

int screenWidth=screenSize.width;

setSize(screenWidth/2,screenHeight/2);

setLocation(screenWidth/4,screenHeight/4);

Image img=toolKit.getImage("icon.gif");

setIconImage(img);

setTitle("MyEdit");

JMenuBar menuBar=new JMenuBar();

setJMenuBar(menuBar);

JMenu fileMenu=new JMenu("文件");

JMenu editMenu=new JMenu("编辑");

JMenu helpMenu=new JMenu("帮助");

menuBar.add(fileMenu);

menuBar.add(editMenu);

menuBar.add(helpMenu);

JMenuItem newItem=new JMenuItem("新建");

newItem.addActionListener(new NewListener());

JMenuItem openItem=new JMenuItem("打开");

openItem.addActionListener(new OpenListener());

JMenuItem saveItem=new JMenuItem("保存");

saveItem.addActionListener(new SaveListener());

JMenuItem escItem=new JMenuItem("退出");

escItem.addActionListener(new

ActionListener()

{

public void actionPerformed(ActionEvent myE)

{

System.exit(0);

}

});

fileMenu.add(newItem);

fileMenu.add(openItem);

fileMenu.add(saveItem);

fileMenu.add(escItem);

JMenuItem allItem=new JMenuItem("全选");

//JMenuItem copyItem=new JMenuItem("复制");

//CopyAction copyAction=new CopyAction();

//copyItem.addActionListener(copyAction);

JMenuItem cutItem=new JMenuItem("剪切");

//JMenuItem pasteItem=new JMenuItem("粘贴");

//Action pasteAction=new PasteAction();

//pasteItem.addActionListener(pasteAction);

editMenu.add(allItem);

allItem.addActionListener(new

ActionListener()

{

public void actionPerformed(ActionEvent myE)

{

textArea.selectAll();

}

});

CopyAction copyAction=new CopyAction("剪切");

editMenu.add(copyAction);

CutAction cutAction=new CutAction("复制");

editMenu.add(cutAction);

Action pasteAction=new PasteAction("粘贴");

editMenu.add(pasteAction);

popup=new JPopupMenu();

popup.add(copyAction);

popup.add(pasteAction);

popup.add(cutAction);

textArea = new JTextArea();

textArea.add(popup);

textArea.addMouseListener(new

MouseListener(){

public void mouseClicked(MouseEvent e) {} public void mouseEntered(MouseEvent e) {} public void mouseExited(MouseEvent e) {} public void mousePressed(MouseEvent e) {

if (e.getButton() == MouseEvent.BUTTON3)

{

popup.show(textArea, e.getX(), e.getY());

}

} public void mouseReleased(MouseEvent e) {} });//可尝试用MouseAdapter,代码可能更简单

JScrollPane scroller = new JScrollPane(textArea);

add(scroller);

//OR--this.getContentPane().add(scroller)

//scroller.setComponentPopupMenu(popup);

//textArea.setInheritsPopupMenu(true);

//scroller.addMouseListener(new MouseAdapter(){});

}

public void writeFile(String fileName)

{

try

{

File file = new File(fileName);

FileWriter write = new FileWriter(file);

write.write(textArea.getText());

write.close();

}

catch(Exception e){

System.out.println("Error closing file!");

}

public void openFile(String fileName)

{

try

{

File file = new File(fileName);

FileReader readIn = new FileReader(file);

int size = (int)file.length();

int charsRead = 0;

char[] content = new char[size];

while(readIn.ready())

charsRead += readIn.read(content,charsRead,size-charsRead);

readIn.close();

textArea.setText(new String(content,0,charsRead));

}

catch(IOException e)

{

System.out.println("Error opening file!");

}

private class NewListener implements ActionListener

{

public void actionPerformed(ActionEvent myE)

{

textArea.setText("");

}

private class OpenListener implements ActionListener

{

public void actionPerformed(ActionEvent myE)

{

openFileDialog.setVisible(true);

fileName = openFileDialog.getDirectory()+openFileDialog.getFile();

if(fileName != null)

{

openFile(fileName);

}

private class SaveListener implements ActionListener

{

public void actionPerformed(ActionEvent myE)

{

saveFileDialog.setVisible(true);

fileName = saveFileDialog.getDirectory()+saveFileDialog.getFile();

if(fileName !=null)

{

writeFile(fileName);

}

private class CutAction extends AbstractAction

{

public CutAction(String name)

{

super(name);

}

public void actionPerformed(ActionEvent event)

{

String text = textArea.getSelectedText();

StringSelection selection = new StringSelection(text);

clipboard.setContents(selection,null);

textArea.replaceRange("",textArea.getSelectionStart(),

textArea.getSelectionEnd());

}

private class CopyAction extends AbstractAction

{

public CopyAction(String name)

{

super(name);

}

public void actionPerformed(ActionEvent event)

{

String text = textArea.getSelectedText();

StringSelection selection= new StringSelection(text);

clipboard.setContents(selection,null);

}

private class PasteAction extends AbstractAction

{

public PasteAction(String name)

{

super(name);

}

public void actionPerformed(ActionEvent event)

{

Transferable contents = clipboard.getContents(this);

if(contents==null)

return;

String text;

text="";

try

{

text = (String)contents.getTransferData(DataFlavor.stringFlavor);

}

catch(Exception ex){}

textArea.replaceRange(text,

textArea.getSelectionStart(),textArea.getSelectionEnd());

}

private JTextArea textArea;

private JPopupMenu popup;

private String fileName="";

private FileDialog openFileDialog=new FileDialog(this,"OpenFile",FileDialog.LOAD); private FileDialog saveFileDialog=new FileDialog(this,"SaveFile",FileDialog.SAVE);

Toolkit toolKit = Toolkit.getDefaultToolkit();

private Clipboard clipboard = toolKit.getSystemClipboard();}

如何用JAVA程序编写一个记事本

import java.io.*;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.undo.CannotRedoException;

import javax.swing.undo.UndoManager;

import java.util.Date;

import java.text.SimpleDateFormat;

public class Notepad extends JFrame {

// 菜单

JMenuBar menub = new JMenuBar();

// 显示纯文本的多行区域

JTextArea text = new JTextArea();

JMenu files = new JMenu("文件(F)");

JMenu edit = new JMenu("编辑(E)");

JMenu formats = new JMenu("格式(O)");

JMenu help = new JMenu("帮助(H)");

JMenuItem newFile = new JMenuItem("新建(N)");

JMenuItem open = new JMenuItem("打开(O)");

JMenuItem save = new JMenuItem("保存(S)");

JMenuItem saveAs = new JMenuItem("另存为(A)");

JMenuItem exit = new JMenuItem("退出(X)");

JMenuItem undo = new JMenuItem("撤销(U)");

JMenuItem cut = new JMenuItem("剪切(T)");

JMenuItem copy = new JMenuItem("复制(C)");

JMenuItem paste = new JMenuItem("粘贴(P)");

JMenuItem selectAll = new JMenuItem("全选(A)");

JMenuItem timeDate = new JMenuItem("时间/日期(D)");

JCheckBoxMenuItem lineWrap = new JCheckBoxMenuItem("自动换行(M)");

JMenuItem fonts = new JMenuItem("字体");

JMenuItem about = new JMenuItem("关于记事本(A)");

JFrame th = this;

String name;

String openedPath = null;

boolean opened = false;

boolean reworked = false;

UndoManager undoManager = new UndoManager();

// 初始化窗体

public Notepad(String name) {

super(name);

this.name = name;

int x, y;

// 得到用户屏幕大小

Dimension size = Toolkit.getDefaultToolkit().getScreenSize();

x = (size.width - 600) / 2;

y = (size.height - 400) / 2;

setSize(600, 400);

// 让程序界面显示在屏幕中央

setLocation(x, y);

// 将此窗口的最小大小设置为一个常量值。

setMinimumSize(new Dimension(250, 150));

setDefaultCloseOperation(EXIT_ON_CLOSE);

}

// 初始化布局

void init() {

files.setMnemonic('F');

edit.setMnemonic('E');

formats.setMnemonic('O');

help.setMnemonic('H');

newFile.setMnemonic('N');

open.setMnemonic('O');

save.setMnemonic('S');

saveAs.setMnemonic('A');

exit.setMnemonic('X');

undo.setMnemonic('U');

cut.setMnemonic('T');

copy.setMnemonic('C');

paste.setMnemonic('P');

selectAll.setMnemonic('A');

timeDate.setMnemonic('D');

lineWrap.setMnemonic('M');

about.setMnemonic('A');

// 为控件添加助记符

newFile.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,

InputEvent.CTRL_MASK));

open.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,

InputEvent.CTRL_MASK));

save.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,

InputEvent.CTRL_MASK));

exit.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Q,

InputEvent.CTRL_MASK));

cut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,

InputEvent.CTRL_MASK));

copy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,

InputEvent.CTRL_MASK));

paste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,

InputEvent.CTRL_MASK));

selectAll.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A,

InputEvent.CTRL_MASK));

// 为控件添加快捷键

timeDate.setAccelerator(KeyStroke.getKeyStroke("F5"));

files.add(newFile);

files.add(open);

files.add(save);

files.add(saveAs);

files.addSeparator();

files.add(exit);

edit.add(undo);

edit.addSeparator();

edit.add(cut);

edit.add(copy);

edit.add(paste);

edit.addSeparator();

edit.add(selectAll);

edit.add(timeDate);

formats.add(lineWrap);

formats.add(fonts);

help.add(about);

menub.add(files);

menub.add(edit);

menub.add(formats);

menub.add(help);

setJMenuBar(menub);

getContentPane().add(new JScrollPane(text));

Listen listen = new Listen();

Listen1 listen1 = new Listen1();

// 为控件添加事件侦听器

newFile.addActionListener(listen);

undo.addActionListener(listen);

open.addActionListener(listen);

save.addActionListener(listen);

saveAs.addActionListener(listen);

exit.addActionListener(listen);

cut.addActionListener(listen);

copy.addActionListener(listen);

paste.addActionListener(listen);

selectAll.addActionListener(listen);

timeDate.addActionListener(listen);

lineWrap.addActionListener(listen);

about.addActionListener(listen);

open.addActionListener(listen1);

save.addActionListener(listen1);

saveAs.addActionListener(listen1);

// 暂时没有实现的功能 :设置字体

//undo功能没有实现

fonts.setEnabled(false);

}

class Listen implements ActionListener {

// 实现用于一般操作的事件侦听器

public void actionPerformed(ActionEvent e) {

Object source = e.getSource();

if (source == newFile) {

text.setText("");

// 设置标题

th.setTitle(name);

openedPath = null;

opened = false;

} else if (source == exit)

setVisible(false);

else if (source == undo)

try {

//此功能没有实现撤销要用栈？

// undo.setEnabled(undoManager.canUndo());

undoManager.undo();

} catch (CannotRedoException cre) {

cre.printStackTrace();

}

else if (source == selectAll)

text.selectAll();

else if (source == cut)

text.cut();

else if (source == copy)

text.copy();

else if (source == paste)

text.paste();

else if (source == lineWrap)

// 设置文本区的换行策略(获取文本区的换行策略)

text.setLineWrap(!text.getLineWrap());

else if (source == about) {

String message = "--------\n版本：1.0\n作者：时超" +

"\n撤销功能要用堆栈存贮操作" +

"\n还有字体格式"+

"\n暂时没有实现" +

"\n\n感谢您的使用";

JOptionPane.showMessageDialog(th, message, "关于",

JOptionPane.PLAIN_MESSAGE);

} else if (source == timeDate) {

Date nowTime = new Date();

SimpleDateFormat times = new SimpleDateFormat(

"HH:mm yyyy-MM-dd");

text.insert(times.format(nowTime), text.getCaretPosition());

}

class Listen1 implements ActionListener {

// 实现用于对文件进行操作的事件侦听器

public void actionPerformed(ActionEvent e) {

Object source = e.getSource();

// 打开文件事件

if (source == open) {

// 显示对话窗口以便选择文件

FileDialog openFile = new FileDialog(th, "打开文件",

FileDialog.LOAD);

openFile.setVisible(true);

// 获取文件路径

String filePath = openFile.getDirectory() + openFile.getFile();

try {

FileInputStream fis = new FileInputStream(filePath);

byte[] content = new byte[fis.available()];

fis.read(content);

text.setText(new String(content));

// 设置 TextComponent 的文本插入符的位置

text.setCaretPosition(0);

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

th.setTitle(openFile.getFile() + name);

openedPath = filePath;

opened = true;

}

fis.close();

} catch (Exception ex) {

ex.printStackTrace();

}

opened = true;

}

// 保存及另存为事件

else if (source == save || source == saveAs) {

String savePath = openedPath;

if (savePath == null || source == saveAs) {

// 如果 mode 的值为 LOAD，那么文件对话框将查找要读取的文件，所显示的文件是当前目录中的文件

// 如果 mode 的值为 SAVE，则文件对话框将查找要写入文件的位置。

FileDialog saveFile = new FileDialog(th, "保存文件",

FileDialog.SAVE);

saveFile.setVisible(true);

savePath = saveFile.getDirectory() + saveFile.getFile();

}

try {

FileOutputStream fos = new FileOutputStream(savePath);

fos.write(text.getText().getBytes());

fos.close();

} catch (Exception ex) {

ex.printStackTrace();

}

if (source == save)

openedPath = savePath;

}

public static void main(String[] args) {

try {

// 使用当前线程的上下文类加载器加载给定类名称所指定的 LookAndFeel

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

} catch (Exception e) {

System.err.println("Couldn't use the system look and feel:" + e);

}

String name = ("--记事本版本1.0--");

Notepad note = new Notepad(name);

note.init();

note.setVisible(true);

}

简单记事本的java程序代码

天啊，冖_Na0 为什么会有我编的记事本代码呢？？？呵呵……你肯定是“请教”过我的吧？？

呵呵……我自己编了一个，不过呢，没有windows那么多的功能啊。

涉及到两个文件：

第一个文件中的代码：

package MyProject;

import java.awt.BorderLayout;

import javax.swing.JPanel;

import javax.swing.JFrame;

import java.awt.Dimension;

import javax.swing.JMenuBar;

import javax.swing.JMenu;

import javax.swing.JMenuItem;

import javax.swing.JLabel;

import java.awt.Rectangle;

import javax.swing.JTextArea;

import javax.swing.JScrollPane;

import java.awt.datatransfer.*;

import java.io.*;

public class MainFrame extends JFrame {

private static final long serialVersionUID = 1L;

private JPanel jContentPane = null;

private JMenuBar jJMenuBar = null;

private JMenu jMenu = null;

private JMenu jMenu1 = null;

private JMenu jMenu2 = null;

private JMenuItem jMenuItem = null;

private JMenuItem jMenuItem1 = null;

private JMenuItem jMenuItem2 = null;

private JMenuItem jMenuItem3 = null;

private JLabel jLabel = null;

private JScrollPane jScrollPane = null;

private JTextArea jTextArea = null;

private JMenuItem jMenuItem4 = null;

private JMenuItem jMenuItem5 = null;

private JMenuItem jMenuItem6 = null;

private JMenuItem jMenuItem7 = null;

private static MainFrame myMainFrame=null;

private static String textstr="";///用于记录文本文件的路径

private File myFile=null;

private FileReader myrder=null;

private FileWriter mywr=null;

/**

* This is the default constructor

public MainFrame() {

super();

initialize();

}

/**

* This method initializes this

* @return void

private void initialize() {

this.setSize(412, 350);

this.setJMenuBar(getJJMenuBar());

this.setContentPane(getJContentPane());

this.setTitle("JFrame");

this.addWindowListener(new java.awt.event.WindowAdapter() {

public void windowActivated(java.awt.event.WindowEvent e) {

if(!textstr.equals("")){

try{

myFile=new File(textstr);

if(!myFile.exists()){

myFile.createNewFile();

}

myrder=new FileReader(myFile);

char[] mychar=new char[(int)myFile.length()];

myrder.read(mychar);

String tmp=new String(mychar);

jTextArea.setText(tmp);

myrder.close();

}

catch(Exception ee){

ee.printStackTrace();

}

public void windowClosing(java.awt.event.WindowEvent e) {

System.exit(0);

}

});

this.setVisible(true);

myMainFrame=this;

}

/**

* This method initializes jContentPane

* @return javax.swing.JPanel

private JPanel getJContentPane() {

if (jContentPane == null) {

jLabel = new JLabel();

jLabel.setBounds(new Rectangle(15, 18, 65, 18));

jLabel.setText("文件内容：");

jContentPane = new JPanel();

jContentPane.setLayout(null);

jContentPane.add(jLabel, null);

jContentPane.add(getJScrollPane(), null);

}

return jContentPane;

}

/**

* This method initializes jJMenuBar

* @return javax.swing.JMenuBar

private JMenuBar getJJMenuBar() {

if (jJMenuBar == null) {

jJMenuBar = new JMenuBar();

jJMenuBar.add(getJMenu());

jJMenuBar.add(getJMenu1());

jJMenuBar.add(getJMenu2());

}

return jJMenuBar;

}

/**

* This method initializes jMenu

* @return javax.swing.JMenu

private JMenu getJMenu() {

if (jMenu == null) {

jMenu = new JMenu();

jMenu.setText("文件");

jMenu.add(getJMenuItem());

jMenu.add(getJMenuItem1());

jMenu.add(getJMenuItem2());

jMenu.add(getJMenuItem3());

}

return jMenu;

}

/**

* This method initializes jMenu1

* @return javax.swing.JMenu

private JMenu getJMenu1() {

if (jMenu1 == null) {

jMenu1 = new JMenu();

jMenu1.setText("编辑");

jMenu1.add(getJMenuItem4());

jMenu1.add(getJMenuItem5());

jMenu1.add(getJMenuItem6());

}

return jMenu1;

}

/**

* This method initializes jMenu2

* @return javax.swing.JMenu

private JMenu getJMenu2() {

if (jMenu2 == null) {

jMenu2 = new JMenu();

jMenu2.setText("帮助");

jMenu2.add(getJMenuItem7());

}

return jMenu2;

}

/**

* This method initializes jMenuItem

* @return javax.swing.JMenuItem

private JMenuItem getJMenuItem() {

if (jMenuItem == null) {

jMenuItem = new JMenuItem();

jMenuItem.setText("打开");

jMenuItem.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

MainFrame.this.myMainFrame.setEnabled(false);

SelectTextFile mysl=new SelectTextFile();

mysl.setVisible(true);

}

});

}

return jMenuItem;

}

/**

* This method initializes jMenuItem1

* @return javax.swing.JMenuItem

private JMenuItem getJMenuItem1() {

if (jMenuItem1 == null) {

jMenuItem1 = new JMenuItem();

jMenuItem1.setText("关闭");

jMenuItem1.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

try{

myFile=null;

}

catch(Exception ee){

ee.printStackTrace();

}

jTextArea.setText("");

}

});

}

return jMenuItem1;

}

/**

* This method initializes jMenuItem2

* @return javax.swing.JMenuItem

private JMenuItem getJMenuItem2() {

if (jMenuItem2 == null) {

jMenuItem2 = new JMenuItem();

jMenuItem2.setText("保存");

jMenuItem2.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

try{

String tmp=jTextArea.getText();

char[] mychar=tmp.toCharArray();

myFile.delete();

myFile.createNewFile();

mywr=new FileWriter(myFile);

mywr.write(mychar);

mywr.close();

}

catch(Exception ee){

ee.printStackTrace();

}

});

}

return jMenuItem2;

}

/**

* This method initializes jMenuItem3

* @return javax.swing.JMenuItem

private JMenuItem getJMenuItem3() {

if (jMenuItem3 == null) {

jMenuItem3 = new JMenuItem();

jMenuItem3.setText("退出");

jMenuItem3.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

System.exit(0);

}

});

}

return jMenuItem3;

}

/**

* This method initializes jScrollPane

* @return javax.swing.JScrollPane

private JScrollPane getJScrollPane() {

if (jScrollPane == null) {

jScrollPane = new JScrollPane();

jScrollPane.setBounds(new Rectangle(15, 46, 371, 225));

jScrollPane.setViewportView(getJTextArea());

}

return jScrollPane;

}

/**

* This method initializes jTextArea

* @return javax.swing.JTextArea

private JTextArea getJTextArea() {

if (jTextArea == null) {

jTextArea = new JTextArea();

}

return jTextArea;

}

/**

* This method initializes jMenuItem4

* @return javax.swing.JMenuItem

private JMenuItem getJMenuItem4() {

if (jMenuItem4 == null) {

jMenuItem4 = new JMenuItem();

jMenuItem4.setText("复制");

jMenuItem4.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

MainFrame.this.setClipboardText(MainFrame.this.getToolkit().getSystemClipboard(),jTextArea.getSelectedText());

}

});

}

return jMenuItem4;

}

/**

* This method initializes jMenuItem5

* @return javax.swing.JMenuItem

private JMenuItem getJMenuItem5() {

if (jMenuItem5 == null) {

jMenuItem5 = new JMenuItem();

jMenuItem5.setText("剪切");

jMenuItem5.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

MainFrame.this.setClipboardText(MainFrame.this.getToolkit().getSystemClipboard(),jTextArea.getSelectedText());

jTextArea.setText(jTextArea.getText().substring(0,jTextArea.getSelectionStart()));

}

});

}

return jMenuItem5;

}

/**

* This method initializes jMenuItem6

* @return javax.swing.JMenuItem

private JMenuItem getJMenuItem6() {

if (jMenuItem6 == null) {

jMenuItem6 = new JMenuItem();

jMenuItem6.setText("黏贴");

jMenuItem6.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

try{

jTextArea.setText(jTextArea.getText().substring(0,jTextArea.getSelectionStart()));

jTextArea.setText(jTextArea.getText()+(MainFrame.this.getClipboardText(MainFrame.this.getToolkit().getSystemClipboard())));

}

catch(Exception ee){

ee.printStackTrace();

}

});

}

return jMenuItem6;

}

/**

* This method initializes jMenuItem7

* @return javax.swing.JMenuItem

private JMenuItem getJMenuItem7() {

if (jMenuItem7 == null) {

jMenuItem7 = new JMenuItem();

jMenuItem7.setText("关于记事本");

jMenuItem7.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

////暂无代码！！

}

});

}

return jMenuItem7;

}

public static void main(String args[]){

new MainFrame();

}

public static MainFrame getMyMainFrame() {

return myMainFrame;

}

public static void setMyMainFrame(MainFrame myMainFrame) {

MainFrame.myMainFrame = myMainFrame;

}

public static String getTextstr() {

return textstr;

}

public static void setTextstr(String textstr) {

MainFrame.textstr = textstr;

}

protected static String getClipboardText(Clipboard clip) throws Exception{

Transferable clipT = clip.getContents(null);// 获取剪切板中的内容

if (clipT != null) {

if (clipT.isDataFlavorSupported(DataFlavor.stringFlavor)) // 检查内容是否是文本类型

return (String)clipT.getTransferData(DataFlavor.stringFlavor);

}

return null;

}

protected static void setClipboardText(Clipboard clip, String writeMe) {

Transferable tText = new StringSelection(writeMe);

clip.setContents(tText, null);

}

} // @jve:decl-index=0:visual-constraint="10,10"

第二个文件中的代码：

（太长了，贴不上来）

整个效果就是实现了基本的打开、关闭、保存、退出的功能。

效果如图：

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