记事本的源代码（记事本的源代码C语言）

今天给各位分享记事本的源代码的知识，其中也会对记事本的源代码C语言进行解释，如果能碰巧解决你现在面临的问题，别忘了关注本站，现在开始吧！

本文目录一览：

• 1、Java记事本源代码
• 2、记事本JAVA的源代码
• 3、用Java编写简易记事本源代码
• 4、C语言编写的记事本源代码

Java记事本源代码

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.FlowLayout;

import java.awt.datatransfer.Clipboard;

import java.awt.datatransfer.DataFlavor;

import java.awt.datatransfer.Transferable;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.FocusEvent;

import java.awt.event.FocusListener;

import java.awt.event.InputEvent;

import java.awt.event.MouseEvent;

import java.awt.event.MouseListener;

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

import javax.swing.JFileChooser;

import javax.swing.JFrame;

import javax.swing.JMenu;

import javax.swing.JMenuBar;

import javax.swing.JMenuItem;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.JPopupMenu;

import javax.swing.JScrollPane;

import javax.swing.JTextArea;

import javax.swing.KeyStroke;

import javax.swing.filechooser.FileFilter;

public class Demo extends JFrame {

private static final long serialVersionUID = 1L; //Eclipse自动生成序列号

String name = "无标题";

JPanel menuPanel = new JPanel();

JTextArea text = new TextAreaMenu(); //文本编辑区

JScrollPane jsp = new JScrollPane(text); //可滚动编辑区

JMenuBar mnbMain = new JMenuBar();

JMenu mnServer = new JMenu("文件(F)");

JMenu mnEdit = new JMenu("编辑(E)");

JMenuItem[] mniServers = new JMenuItem[]{

new JMenuItem("新建(N)"),

new JMenuItem("保存(S)"),

new JMenuItem("打开(O)"),

new JMenuItem("退出(X)"),

};

{

menuPanel.setLayout(new FlowLayout(FlowLayout.LEFT, 0, 0));

mnbMain.add(mnServer);

menuPanel.add(mnbMain);

mnbMain.setBounds(5, 0, 50, 30);

for (int i = 0; i mniServers.length; i++) {

mnServer.add(mniServers[i]);

}

mniServers[0].addActionListener(new ActionListener() { //定义"新建"组件操作

@Override

public void actionPerformed(ActionEvent arg0) {

new Demo(getLocation().x+15,getLocation().y+5);

}

});

mniServers[1].addActionListener(new ActionListener() { //定义"保存"组件操作

@Override

public void actionPerformed(ActionEvent arg0) {

chooseToSave();

}

});

mniServers[2].addActionListener(new ActionListener() { //定义"打开"组件操作

@Override

public void actionPerformed(ActionEvent arg0) {

chooseToOpen();

}

});

mniServers[3].addActionListener(new ActionListener() { //定义"退出"组件操作

@Override

public void actionPerformed(ActionEvent arg0) {

System.exit(0);

}

});

text.addFocusListener(new FocusListener() {

@Override

public void focusLost(FocusEvent e) {

// TODO Auto-generated method stub

}

@Override

public void focusGained(FocusEvent e) {

}

});

}

public Demo(int x,int y) {

this.setTitle( name +" - 记事本");

this.setBounds(x, y, 600, 400);

this.setLayout(new BorderLayout());

this.add(menuPanel, BorderLayout.NORTH);

this.add(jsp);

jsp.setBounds(5, 30, getWidth()-10, getHeight()-50);

this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);

this.setVisible(true);

}

public Demo() {

this(200,200);

}

protected void chooseToSave() {

File file = chooseFile();

if(null==file)return;

if(file.exists()){

int cho = JOptionPane.showConfirmDialog(this, "文件已存在，是否覆盖？");

System.out.println(cho);

if(cho==JOptionPane.OK_OPTION)save(file);

else return;

}

else save(file);

}

private void save(File file) {

name = file.getName();

write(text.getText(),file.getPath());

this.setTitle( name +" - 记事本");

}

protected void chooseToOpen() {

File file = chooseFile();

if(null==file||!file.exists())return;

name = file.getName();

Demo.this.setTitle( name +" - 记事本");

read(text,file);

}

/*********************************************MAIN**************************************************/

public static void main(String[] args) {

new Demo();

}

private File chooseFile(){

JFileChooser chooser = new JFileChooser(); //构建文件选择器

chooser.setFileFilter(new FileFilter() {

@Override

public String getDescription() {

return "文本文件";

}

@Override

public boolean accept(File f) {

String name = f.getName().toLowerCase();

return f.isDirectory() || name.endsWith(".txt")

||name.endsWith(".c") || name.endsWith(".java")

||name.endsWith(".cpp"); //可识别文件

}

});

int result = chooser.showDialog(null, "确定");

if (result==JFileChooser.APPROVE_OPTION) {

File file = chooser.getSelectedFile();

System.out.println(file.getAbsolutePath());

} else {

System.out.println("未选择文件");

}

return chooser.getSelectedFile();

}

public static void read(JTextArea text,File file){ //定义读取文件操作

FileReader fr;

try {

fr = new FileReader(file);

BufferedReader br = new BufferedReader(fr);

String string = null;

while((string = br.readLine()) != null){

text.append(string+"\n");

}

br.close();

fr.close();

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

public static void write(String txt,String fileName){

FileWriter fw;

try {

fw = new FileWriter(fileName);

BufferedWriter bw = new BufferedWriter(fw);

bw.write(txt);

bw.flush();

bw.close();

fw.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

class TextAreaMenu extends JTextArea implements MouseListener {

private static final long serialVersionUID = -2308615404205560110L;

private JPopupMenu pop = null; // 弹出菜单

private JMenuItem selectAll = null,copy = null, paste = null, cut = null, cancel=null; // 功能菜单

public TextAreaMenu() {

super();

init();

}

private void init() {

this.addMouseListener(this);

this.setSelectedTextColor(Color.red);

pop = new JPopupMenu();

pop.add(selectAll = new JMenuItem("全选"));

pop.add(copy = new JMenuItem("复制"));

pop.add(paste = new JMenuItem("粘贴"));

pop.add(cut = new JMenuItem("剪切"));

pop.add(cancel = new JMenuItem("撤销"));

selectAll.setAccelerator(KeyStroke.getKeyStroke('A', InputEvent.CTRL_MASK));

copy.setAccelerator(KeyStroke.getKeyStroke('C', InputEvent.CTRL_MASK));

paste.setAccelerator(KeyStroke.getKeyStroke('V', InputEvent.CTRL_MASK));

cut.setAccelerator(KeyStroke.getKeyStroke('X', InputEvent.CTRL_MASK));

cancel.setAccelerator(KeyStroke.getKeyStroke('Z', InputEvent.CTRL_MASK));

copy.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

action(e);

}

});

paste.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

action(e);

}

});

cut.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

action(e);

}

});

this.add(pop);

}

/**

* 菜单动作

* @param e

*/

public void action(ActionEvent e) {

String str = e.getActionCommand();

if (str.equals(selectAll.getText())) { // 全选

this.selectAll();

}

else if (str.equals(copy.getText())) { // 复制

this.copy();

} else if (str.equals(paste.getText())) { // 粘贴

this.paste();

} else if (str.equals(cut.getText())) { // 剪切

this.cut();

}

else if (str.equals(cancel.getText())) { //撤销

this.cut();

}

}

public JPopupMenu getPop() {

return pop;

}

public void setPop(JPopupMenu pop) {

this.pop = pop;

}

/**

* 剪切板中是否有文本数据可供粘贴

*

* @return true为有文本数据

*/

public boolean isClipboardString() {

boolean b = false;

Clipboard clipboard = this.getToolkit().getSystemClipboard();

Transferable content = clipboard.getContents(this);

try {

if (content.getTransferData(DataFlavor.stringFlavor) instanceof String) {

b = true;

}

} catch (Exception e) {

}

return b;

}

/**

* 文本组件中是否具备复制的条件

*

* @return true为具备

*/

public boolean isCanCopy() {

boolean b = false;

int start = this.getSelectionStart();

int end = this.getSelectionEnd();

if (start != end)

b = true;

return b;

}

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) {

copy.setEnabled(isCanCopy());

paste.setEnabled(isClipboardString());

cut.setEnabled(isCanCopy());

pop.show(this, e.getX(), e.getY());

}

}

public void mouseReleased(MouseEvent e) {

}

}

记事本JAVA的源代码

import java.awt.BorderLayout;

import java.awt.FileDialog;

import java.awt.Font;

import java.awt.datatransfer.Clipboard;

import java.awt.datatransfer.DataFlavor;

import java.awt.datatransfer.StringSelection;

import java.awt.datatransfer.Transferable;

import java.awt.datatransfer.UnsupportedFlavorException;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

import javax.swing.JFrame;

import javax.swing.JMenu;

import javax.swing.JMenuBar;

import javax.swing.JMenuItem;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JTextArea;

import javax.swing.border.TitledBorder;

/*因为根据个人的电脑路径可能有所偏差，没有源路径的情况下，设置默认保存路径为D盘根目录下

* 若要选择保存其他地方，可以选择 另存为*/

public class TestDemo extends JFrame {

private static final long serialVersionUID = -5355432125621015300L;

private String url = null;//文件路径

private String str=null;//复制或剪切 的字符串

private StringSelection stringSelection=null;

private Clipboard clipboard=new Clipboard(str);

private Transferable transferable=null;

private DataFlavor flavor=null;

public TestDemo() {

init();

}

private void init() {

setTitle("我的记事本");

setSize(500, 600);

setContentPane(createContentPane());//添加主面板

}

/*创建主面板*/

private JPanel createContentPane() {

JPanel pane = new JPanel(new BorderLayout());

pane.add(BorderLayout.NORTH, createChocePane());//添加菜单栏

pane.add(createAreaPane());//添加文本编辑区域

return pane;

}

/*创建菜单栏，以及实现功能*/

private JPanel createChocePane() {

JPanel pane = new JPanel();

JMenuBar menuBar1 = new JMenuBar();

JMenu menu = new JMenu("文件");

menuBar1.add(menu);

JMenuItem menuIt1 = new JMenuItem("新建");

JMenuItem menuIt2 = new JMenuItem("打开");

JMenuItem menuIt3 = new JMenuItem("保存");

JMenuItem menuIt4 = new JMenuItem("另存为");

menu.add(menuIt1);

menu.add(menuIt2);

menu.add(menuIt3);

menu.add(menuIt4);

JMenuBar menuBar2 = new JMenuBar();

JMenu menu2 = new JMenu("编辑");

menuBar2.add(menu2);

JMenuItem menuIt5 = new JMenuItem("复制");

JMenuItem menuIt6 = new JMenuItem("剪切");

JMenuItem menuIt7 = new JMenuItem("粘帖");

menu2.add(menuIt5);

menu2.add(menuIt6);

menu2.add(menuIt7);

JMenuBar menuBar3 = new JMenuBar();

JMenu menu3 = new JMenu("帮助");

menuBar3.add(menu3);

JMenuItem menuIt8 = new JMenuItem("关于记事本");

menu3.add(menuIt8);

pane.add(menuBar1);

pane.add(menuBar2);

pane.add(menuBar3);

menuIt1.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

testArea.setText(null);

}

});

menuIt2.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent arg0) {

final FileDialog fd = new FileDialog(new JFrame(), "查找文件",

FileDialog.LOAD);

fd.setVisible(true);

if (fd.getDirectory() != null fd.getFile() != null) {

testArea.setText(null);

url = fd.getDirectory() + fd.getFile();

try {

BufferedReader in = new BufferedReader(new FileReader(

url));

for (int i = 0;; i++) {

testArea.append(in.readLine());

if (in.read() == -1) {

break;

} else

continue;

}

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

}

});

menuIt3.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

if (url==null) {

url="D:\\新建 文本文档.txt";

}

File f = new File(url);

BufferedWriter out = null;

try {

out = new BufferedWriter(new FileWriter(url));

f.createNewFile();

out.append(testArea.getText());

out.flush();

} catch (IOException e1) {

e1.printStackTrace();

} finally {

try {

out.close();

} catch (IOException e1) {

e1.printStackTrace();

}

}

}

});

menuIt4.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent arg0) {

FileDialog fd = new FileDialog(new JFrame(), "保存文本",

FileDialog.SAVE);

fd.setVisible(true);

if (url!=null) {

File f = new File(url);

BufferedWriter out = null;

try {

f.createNewFile();

out = new BufferedWriter(new FileWriter(url));

out.append(testArea.getText());

out.flush();

} catch (IOException e) {

e.printStackTrace();

} finally {

try {

out.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

}

});

menuIt5.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

str=testArea.getSelectedText();

stringSelection=new StringSelection(str);

clipboard.setContents(stringSelection, null);

}

});

menuIt6.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent arg0) {

str=testArea.getSelectedText();

stringSelection=new StringSelection(str);

clipboard.setContents(stringSelection, null);

int start=testArea.getSelectionStart();

int end=testArea.getSelectionEnd();

testArea.replaceRange( null,start,end);

}

});

menuIt7.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

transferable=clipboard.getContents(this);

flavor=DataFlavor.stringFlavor;

if (transferable.isDataFlavorSupported(flavor)) {

int start=testArea.getSelectionStart();

int end=testArea.getSelectionEnd();

testArea.replaceRange( null,start,end);

int pos=testArea.getCaretPosition();

try {

str=(String)transferable.getTransferData(flavor);

testArea.insert(str, pos);

} catch (UnsupportedFlavorException e1) {

e1.printStackTrace();

} catch (IOException e1) {

e1.printStackTrace();

}

}

}

});

menuIt8.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

JOptionPane.showMessageDialog(null,"功能简单，绝对原创 ");

}

});

return pane;

}

JTextArea testArea;

private JScrollPane createAreaPane() {

JScrollPane pane = new JScrollPane();

pane.setBorder(new TitledBorder("编辑区域"));

testArea = new JTextArea();

testArea.setFont(new Font("宋体", Font.BOLD, 13));

testArea.setLineWrap(true);

pane.getViewport().add(testArea);

return pane;

}

public static void main(String[] args) {

TestDemo td = new TestDemo();

td.setVisible(true);

}

}

用Java编写简易记事本源代码

importjava.awt.BorderLayout;importjava.awt.Container;importjava.awt.Font;importjava.awt.event.ActionEvent;importjava.awt.event.ActionListener;importjava.awt.event.InputEvent;importjava.awt.event.KeyAdapter;importjava.awt.event.KeyEvent;importjava.awt.event.MouseAdapter;importjava.awt.event.MouseEvent;importjava.awt.event.WindowAdapter;importjava.awt.event.WindowEvent;importjava.io.BufferedReader;importjava.io.BufferedWriter;importjava.io.File;importjava.io.FileReader;importjava.io.FileWriter;importjava.io.IOException;importjavax.swing.BorderFactory;importjavax.swing.JFileChooser;importjavax.swing.JFrame;importjavax.swing.JLabel;importjavax.swing.JMenu;importjavax.swing.JMenuBar;importjavax.swing.JMenuItem;importjavax.swing.JOptionPane;importjavax.swing.JPopupMenu;importjavax.swing.JScrollPane;importjavax.swing.JTextArea;importjavax.swing.KeyStroke;importjavax.swing.ScrollPaneConstants;importjavax.swing.SwingConstants;publicclassJNotePadUIextendsJFrame{privateJMenuItemmenuOpen;privateJMenuItemmenuSave;privateJMenuItemmenuSaveAs;privateJMenuItemmenuClose;privateJMenueditMenu;privateJMenuItemmenuCut;privateJMenuItemmenuCopy;privateJMenuItemmenuPaste;privateJMenuItemmenuAbout;privateJTextAreatextArea;privateJLabelstateBar;privateJFileChooserfileChooser;privateJPopupMenupopUpMenu;publicJNotePadUI(){super("新建文本文件");setUpUIComponent();setUpEventListener();setVisible(true);}privatevoidsetUpUIComponent(){setSize(640,480);//菜单栏JMenuBarmenuBar=newJMenuBar();//设置「文件」菜单JMenufileMenu=newJMenu("文件");menuOpen=newJMenuItem("打开");//快捷键设置menuOpen.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,InputEvent.CTRL_MASK));menuSave=newJMenuItem("保存");menuSave.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.CTRL_MASK));menuSaveAs=newJMenuItem("另存为");menuClose=newJMenuItem("关闭");menuClose.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Q,InputEvent.CTRL_MASK));fileMenu.add(menuOpen);fileMenu.addSeparator();//分隔线fileMenu.add(menuSave);fileMenu.add(menuSaveAs);fileMenu.addSeparator();//分隔线fileMenu.add(menuClose);//设置「编辑」菜单JMenueditMenu=newJMenu("编辑");menuCut=newJMenuItem("剪切");menuCut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,InputEvent.CTRL_MASK));menuCopy=newJMenuItem("复制");menuCopy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,InputEvent.CTRL_MASK));menuPaste=newJMenuItem("粘贴");menuPaste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,InputEvent.CTRL_MASK));editMenu.add(menuCut);editMenu.add(menuCopy);editMenu.add(menuPaste);//设置「关于」菜单JMenuaboutMenu=newJMenu("关于");menuAbout=newJMenuItem("关于JNotePad");aboutMenu.add(menuAbout);menuBar.add(fileMenu);menuBar.add(editMenu);menuBar.add(aboutMenu);setJMenuBar(menuBar);//文字编辑区域textArea=newJTextArea();textArea.setFont(newFont("宋体",Font.PLAIN,16));textArea.setLineWrap(true);JScrollPanepanel=newJScrollPane(textArea,ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);ContainercontentPane=getContentPane();contentPane.add(panel,BorderLayout.CENTER);//状态栏stateBar=newJLabel("未修改");stateBar.setHorizontalAlignment(SwingConstants.LEFT);stateBar.setBorder(BorderFactory.createEtchedBorder());contentPane.add(stateBar,BorderLayout.SOUTH);popUpMenu=editMenu.getPopupMenu();fileChooser=newJFileChooser();}privatevoidsetUpEventListener(){//按下窗口关闭钮事件处理addWindowListener(newWindowAdapter(){publicvoidwindowClosing(WindowEvente){closeFile();}});//菜单-打开menuOpen.addActionListener(newActionListener(){publicvoidactionPerformed(ActionEvente){openFile();}});//菜单-保存menuSave.addActionListener(newActionListener(){publicvoidactionPerformed(ActionEvente){saveFile();}});//菜单-另存为menuSaveAs.addActionListener(newActionListener(){publicvoidactionPerformed(ActionEvente){saveFileAs();}});//菜单-关闭文件menuClose.addActionListener(newActionListener(){publicvoidactionPerformed(ActionEvente){closeFile();}});//菜单-剪切menuCut.addActionListener(newActionListener(){publicvoidactionPerformed(ActionEvente){cut();}});//菜单-复制menuCopy.addActionListener(newActionListener(){publicvoidactionPerformed(ActionEvente){copy();}});//菜单-粘贴menuPaste.addActionListener(newActionListener(){publicvoidactionPerformed(ActionEvente){paste();}});//菜单-关于menuAbout.addActionListener(newActionListener(){publicvoidactionPerformed(ActionEvente){//显示对话框JOptionPane.showOptionDialog(null,"程序名称:\nJNotePad\n"+"程序设计:\n\n"+"简介:\n一个简单的文字编辑器\n"+"可作为验收Java的实现对象\n"+"欢迎网友下载研究交流\n\n"+"/","关于JNotePad",JOptionPane.DEFAULT_OPTION,JOptionPane.INFORMATION_MESSAGE,null,null,null);}});//编辑区键盘事件textArea.addKeyListener(newKeyAdapter(){publicvoidkeyTyped(KeyEvente){processTextArea();}});//编辑区鼠标事件textArea.addMouseListener(newMouseAdapter(){publicvoidmouseReleased(MouseEvente){if(e.getButton()==MouseEvent.BUTTON3)popUpMenu.show(editMenu,e.getX(),e.getY());}publicvoidmouseClicked(MouseEvente){if(e.getButton()==MouseEvent.BUTTON1)popUpMenu.setVisible(false);}});}privatevoidopenFile(){if(isCurrentFileSaved()){//文件是否为保存状态open();//打开}else{//显示对话框intoption=JOptionPane.showConfirmDialog(null,"文件已修改，是否保存？","保存文件？",JOptionPane.YES_NO_OPTION,JOptionPane.WARNING_MESSAGE,null);switch(option){//确认文件保存caseJOptionPane.YES_OPTION:saveFile();//保存文件break;//放弃文件保存caseJOptionPane.NO_OPTION:open();break;}}}privatebooleanisCurrentFileSaved(){if(stateBar.getText().equals("未修改")){returnfalse;}else{returntrue;}}privatevoidopen(){//fileChooser是JFileChooser的实例//显示文件选取的对话框intoption=fileChooser.showDialog(null,null);//使用者按下确认键if(option==JFileChooser.APPROVE_OPTION){try{//开启选取的文件BufferedReaderbuf=newBufferedReader(newFileReader(fileChooser.getSelectedFile()));//设定文件标题setTitle(fileChooser.getSelectedFile().toString());//清除前一次文件textArea.setText("");//设定状态栏stateBar.setText("未修改");//取得系统相依的换行字符StringlineSeparator=System.getProperty("line.separator");//读取文件并附加至文字编辑区Stringtext;while((text=buf.readLine())!=null){textArea.append(text);textArea.append(lineSeparator);}buf.close();}catch(IOExceptione){JOptionPane.showMessageDialog(null,e.toString(),"开启文件失败",JOptionPane.ERROR_MESSAGE);}}}privatevoidsaveFile(){//从标题栏取得文件名称Filefile=newFile(getTitle());//若指定的文件不存在if(!file.exists()){//执行另存为saveFileAs();}else{try{//开启指定的文件BufferedWriterbuf=newBufferedWriter(newFileWriter(file));//将文字编辑区的文字写入文件buf.write(textArea.getText());buf.close();//设定状态栏为未修改stateBar.setText("未修改");}catch(IOExceptione){JOptionPane.showMessageDialog(null,e.toString(),"写入文件失败",JOptionPane.ERROR_MESSAGE);}}}privatevoidsaveFileAs(){//显示文件对话框intoption=fileChooser.showSaveDialog(null);//如果确认选取文件if(option==JFileChooser.APPROVE_OPTION){//取得选择的文件Filefile=fileChooser.getSelectedFile();//在标题栏上设定文件名称setTitle(file.toString());try{//建立文件file.createNewFile();//进行文件保存saveFile();}catch(IOExceptione){JOptionPane.showMessageDialog(null,e.toString(),"无法建立新文件",JOptionPane.ERROR_MESSAGE);}}}privatevoidcloseFile(){//是否已保存文件if(isCurrentFileSaved()){//释放窗口资源，而后关闭程序dispose();}else{intoption=JOptionPane.showConfirmDialog(null,"文件已修改，是否保存？","保存文件？",JOptionPane.YES_NO_OPTION,JOptionPane.WARNING_MESSAGE,null);switch(option){caseJOptionPane.YES_OPTION:saveFile();break;caseJOptionPane.NO_OPTION:dispose();}}}privatevoidcut(){textArea.cut();stateBar.setText("已修改");popUpMenu.setVisible(false);}privatevoidcopy(){textArea.copy();popUpMenu.setVisible(false);}privatevoidpaste(){textArea.paste();stateBar.setText("已修改");popUpMenu.setVisible(false);}privatevoidprocessTextArea(){stateBar.setText("已修改");}publicstaticvoidmain(String[]args){newJNotePadUI();}}

C语言编写的记事本源代码

#includestdio.h

#includemalloc.h

#includestring.h

#includestdlib.h

#includectype.h

#define NULL 0

#define MAX 100

typedef struct lnode{

char date[MAX]; //存放数据

struct lnode * prior ; //前驱

struct lnode * next ; //后继

int number ; //记录一个节点的字符数！如果是头节点就记录他的节点个数

int quese ; //记录节点在链表中的位置

}lnodetype;

lnodetype * l ; //设置两个全局变量，分别是头节点指针和尾节点指针

lnodetype * end ;

//**********这个函数是用来初始化的**********//

int iniatelist (lnodetype ** l , lnodetype ** end)

{

(*l) = (lnodetype *)malloc (sizeof (lnodetype) ) ;

if ( (*l) == NULL )

{

printf ("没有只够的内存空间！程序即将退出！");

return 0 ;

}

(*l)-prior =(*l)-next = NULL ; //这是双链表

(*l)-number = (*l)-quese = 0;

(*end) = (*l) ;

printf ("程序初始化完毕！");

return 0;

}

//**********这个函数是用来建立节点，并且插入元素的**********//

int link(lnodetype ** l, lnodetype ** end)

{

lnodetype *s ;

s = (lnodetype *)malloc ( sizeof (lnodetype) ) ;

if ( s == NULL ){

printf ("内存空间不够，程序即将退出！") ;

return 0 ;

}

(*end)-next = s ;

s-prior = (*end) ;

(*end) = (*end)-next ;

(*l)-number++ ; //增加一个节点，头节点的number就加1

s-quese = (*l)-number ; //这个是记录节点在链表中的位置

printf ("%d行", s-quese ) ; //这个是节点在整个链表中的位置

gets(s-date) ;

s - number = strlen(s-date) ;

return 0 ;

}

//**********这个是打印链表的函数**********//

int prin (lnodetype ** l, lnodetype ** end)

{

lnodetype * p ;

int i ;

int j = 0;

int couter = (*l)-number ;

p = (*l)-next ;

for (i=0; i couter; i++){

printf ( "%d行" , i+1 ) ;

j = 0;

while ( ( p-date[j]='a' p-date[j]='z') ||

(p-date[j]='A' p-date[j]='z') ||

p-date[j]='0' p-date[j]='9')

{

printf ( "%c" , p-date[j] ) ;

j++ ;

}

printf ("n") ;

p = p-next ;

}

return 0 ;

}

//*********这个查找和编辑相应行的函数**********//

int search (lnodetype ** l, lnodetype ** end )

{

int number ;

scanf ("%d" , number) ;

int i ;

lnodetype * p ;

p = (*l)-next ;

for ( i=0; inumber-1; i++ )

p = p-next ;

printf ("%d行" , number ) ;

gets (p-date) ;

return 0 ;

}

//**********这个是在文本文件里搜索字符串的函数**********//

int searchstr(lnodetype ** l , lnodetype ** end)

{

char ptr[100] ;

int arrycouter ;

int mystrcmp( char *, char * , int ) ;

printf ( "ok!现在输入你查找的字符串！" ) ;

scanf ( "%s" , ptr ) ;

arrycouter = strlen (ptr) ;

lnodetype * s ;

s = (*l)-next ;

char * p ;

int i = 1 ;

int couter = 0 ;

int number = (*l)-number ;

p = (char *)s-date ;

while ( i number ){

// i=1是，证明没有找到，向第二个节点继续寻找

while ( i ( ( (*p = 'a') (*p = 'z') ) || ( (*p = 'A') (*p = 'Z') ) ) ){

i = mystrcmp ( p , ptr , arrycouter );

if ( i == 1 ){

printf ("字符串已经在第%d行,第%d个字符开始,",s-quese, couter+1 );

i = 0 ;

}

else

{

p++ ;

couter++;

i = 1 ;

}

}

s = s-next ;

p = (char *)s-date ;

number -- ;

}

if ( i == 1 )

printf ("字符串在本文档中不存在！");

return 0 ;

}

//**********（1）这个函数是用来实现退出不保存功能的**********//

int exitunsave(lnodetype ** l, lnodetype ** end)

{

lnodetype * s ;

while( (*l) != (*end) ){ //如果不保存的话，最好是把节点的空间都释放，节省空间

s = (*end) ;

(*end) = (*end)-prior ;

free( s ) ;

}

return 0 ;

}

//**********（2）这个函数是用来实现退出但保存功能的**********//

int quitandsave( lnodetype ** l , lnodetype ** end )

{

FILE * fp ;

char ch ;

char filename[20] ;

lnodetype * p;

int i ;

int j ;

int couter = (*l)-number ;

p = (*l)-next ;

printf ("请输入文件名：") ;

scanf ("%s" , filename ) ;

if ( (fp = fopen( filename , "w" )) == NULL ){

printf ("文件不能打开！n");

return 0 ;

}

for ( i=0; icouter; i++ ){ //有几个节点就进行多少次的存贮

ch = p-date[0] ;

j = 1 ;

while (ch != '\0'){

fputc (ch , fp) ;

ch = p-date[j] ;

j++ ;

}

p = p-next ;

fputc ( '#' , fp ) ; //注意在每个节点的后面加上结束的符号

}

fputc ( '@' , fp ) ; //整个文件关闭的标志

fclose ( fp ) ; //注意关闭文件，

return 0 ;

}

//**********由于库函数比较字符串提供的功能不满足要求，故自己写了一个**********/

int mystrcmp( char * p ,char * sour ,int number )

{

while ( number (*p) == (*sour)

( ( (*p = 'a') (*p = 'z') ) || ( (*p = 'A') (*p = 'Z') ) )){

p++ ;

sour++ ;

number-- ;

}

if ( number == 0 )

return 1 ;

else

return 0 ;

}

//**********这个函数是用来实现统计字符串功能的**********//

int coutword(lnodetype ** l , lnodetype ** end)

{ //考虑到只统计一行的单词没有意义，故统计整个文本

int yes = 1 ; //这个是进入单词的标志

int no = 0 ; //在单词外面的时候的标志

int i , j ,inaword ,count = 0 ;

inaword = no ;

lnodetype * s = (*l)-next ;

for (j=0; j(*l)-number; j++){

for ( i=0; (s-date[i]='a' s-date[i]='z') ||

(s-date[i]='A' s-date[i]='z') ||

(s-date[i]='0' s-date[i]='9' ) ||

(s-date[i]==' '); i++ )

{

if ( s-date[i] == ' ' )

inaword = no ;

else

if ( inaword == no )

{

inaword = yes ;

count++ ; //计算单词

}

}

s = s-next ;

inaword = 0 ; //注意这里，把标志置为0了！

}

printf ( "n文本一共有 %d 行" , (*l)-number ) ;

printf ("n此文本一共有 %d 个单词!" , count ) ;

return count ;

}

//**********这个函数是用来实现计算文本行数功能的**********//

int linecouter(lnodetype ** l , lnodetype ** end )

{

int couter ;

couter = (*l)-number ;

return couter ;

}

//**********这个函数是整和一上所有功能的菜单函数**********//

int editmenu(lnodetype ** l , lnodetype ** end )

{

char choice ;

char * p = "cls" ;

int i = 1 ; //这两个变量是用来控制循环的

int j= 1 ;

system (p) ;

prin ((*l) , (*end)) ;

while (j){

printf ("*********************************** e: 编辑相应行 *************************************n") ;

printf ("*********************************** s: 搜索字符串 *************************************n") ;

printf ("*********************************** t: 统计单词个数 ***********************************n") ;

printf ("*********************************** q: 退出编辑 ***************************************n") ;

scanf("%c",choice);

scanf("%c" , choice) ; //？？？？莫名其妙的问题，非要两个请求输入语句才肯停下来！

switch (choice)

{

case 'e' : {

i = 1 ;

while (i)

{

search( (*l) , (*end) );

system (p) ;

prin( (*l) , (*end) ) ;

printf ("n1 继续编辑 0 结束编辑n") ;

scanf ("%d" , i) ;

}

}

break;

case 's' : {

i = 1 ;

while (i)

{

searchstr( (*l) , (*end) );

getchar();

getchar();

system (p) ;

prin( (*l) , (*end) ) ;

printf ("n1 继续搜索 0 结束搜索n") ;

scanf ("%d" , i) ;

}

}

break;

case 't' : {

coutword ( (*l) , (*end) ) ;

getchar() ;

}break;

default : return 0 ;

}

system (p) ;

prin( (*l) , (*end) ) ;

printf ("n1 回到编辑菜单 0 结束编辑n") ;

scanf ("%d" , j) ;

if (j == 1)

system (p) ;

else

return 0 ;

}

return 0 ;

}

//**********实现第一个模块：新建空白文档**********//

int newtext( lnodetype ** l ,lnodetype ** end )

{

printf ( "新文本文件:n" ) ;

int i = 1 ;

char judstr[MAX] ;

lnodetype * temp ;

char jud ;

char * p = "cls" ;

while ( 1 ){

link( (*l) , (*end) ) ;

jud = (*end)-date[0] ;

if ( jud == '5' ){ //输入‘5’结束一切

temp = (*end) ;

(*end) = (*end)-prior ;

free (temp) ;

while (1){

printf ( "******************************* out :退出不保存 ****************************n") ;

printf ( "******************************* edit :编辑信息 *****************************n") ;

printf ( "******************************* quit :退出而不存盘 **************************n") ;

printf ( "******************************* qas :退出且存盘 ****************************n") ;

printf ( "******************************* con :继续输入！ *****************************n") ;

gets(judstr) ;

if ( !strcmp(judstr , "out") )

{

exitunsave( (*l) , (*end) ) ;

return 0 ;

}

else

if ( !strcmp(judstr , "qas") )

{

quitandsave( (*l) , (*end) ) ;

return 0 ;

}

else

if ( !strcmp(judstr , "edit") )

{

editmenu (l , end) ;

return 0;

}

system (p) ;

}

return 0 ;

}

}

return 0 ;

}

//**********这个是装入文件的函数**********//

int loadtaxt( char * filename )

{

FILE * fp ;

lnodetype * l ;

char ch ;

int i = 0 ;

char * p = "cls" ;

char judstr[MAX] ;

lnodetype * head ;

lnodetype * end ;

iniatelist ( head , end) ;

l = end = head ;

if ( (fp = fopen( filename, "r+")) == NULL ){

printf ("文件不能打开！n") ;

return 0 ;

}

ch = fgetc ( fp ) ;

while ( ch != '@' ){

lnodetype *s ;

s = (lnodetype *)malloc ( sizeof (lnodetype) ) ;

if ( s == NULL ){

printf ("内存空间不够，程序即将退出！") ;

return 0 ;

}

end-next = s ;

s-prior = end ;

end = end-next ;

l-number++ ;

s-quese = l-number ;

printf ("%d行", s-quese ) ;

while ( ch != '#'){

s-date[i] = ch ;

ch = fgetc (fp) ;

i++ ;

}

i = 0;

while ( (end-date[i]='a' end-date[i]='z') ||

(end-date[i]='A' end-date[i]='z') ||

(end-date[i]='0' end-date[i]='9' ) ||

(end-date[i]==' ') )

{

printf ( "%c" , end-date[i] ) ;

i++ ;

}

end-date[i] = '\0' ; //注意在节点的最好加上这个，以让退出保存功能函数知道此节点已结束

printf ( "n" ) ;

i = 0;

ch = fgetc ( fp ) ;

}

fclose (fp) ;

printf ("n文件成功装入！n") ;

while (1){

printf ( "******************************* out :退出不保存 ****************************n") ;

printf ( "******************************* edit :编辑信息 *****************************n") ;

printf ( "******************************* qas :退出且存盘 ****************************n") ;

printf ( "******************************* con :继续输入！ *****************************n") ;

scanf("%s",judstr);

if ( !strcmp(judstr , "out") )

{

exitunsave( l , end ) ;

return 0 ;

}

else

if ( !strcmp(judstr , "qas") )

{

quitandsave( l , end ) ;

return 0 ;

}

else

if ( !strcmp(judstr , "edit") )

{

editmenu (l , end) ;

return 0 ;

}

system (p) ;

}

return 0 ;

}

//**********主函数**********//

void main ( void )

{

//iniatelist (l , end) ;

//newtext(l , end) ;

char filename[MAX] ;

scanf ( "%s" , filename ) ;

loadtaxt( filename ) ;

}

很不容易做的程序！！！

通过编译

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