正文
记事本的java源代码 记事本编写的java代码怎么运行
提示：扫一扫查出行【扫一扫了解最新限行尾号】
复制提示
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();}}
相关问答
Q1: 用记事本写java代码怎么运行？
用记事本写完代码后运行方法如下记事本的java源代码：
1、用浏览器打开用记事本编写记事本的java源代码的代码
新建“文本文档”后记事本的java源代码，鼠标右键点击该文本文档，在菜单栏的“打开方式”选择“用记事本打开”，也可以设置默认打开方式为“记事本”记事本的java源代码；用记事本打开文本文档后，直接在该文档内根据自己的需要输入想要编辑的网页代码。
2、记事本写java代码怎么运行
首先，需要安装jdk并配置环境变量。然后，在命令行中，用javac命令编译用记事本编写的代码。下一步，在命令行中，用java命令执行编译后的结果。
代码是什么
代码是程序员用开发工具所支持的语言写出来的源文件，是一组由字符、符号或信号码元以离散形式表示信息的明确的规则体系。代码设计的原则包括唯一确定性、标准化和通用性、可扩充性与稳定性、便于识别与记忆、力求短小与格式统一以及容易修改等。
计算机源代码最终目的是将人类可读文本翻译成为计算机可执行的二进制指令，这种过程叫编译，它由通过编译器完成。源代码就是用汇编语言和高级语言写出来的地代码。目标代码是指源代码经过编译程序产生的能被 cpu直接识别二进制代码。
可执行代码就是将目标代码连接后形成的可执行文件,当然也是二进制的。
Q2: 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);
}
}
Q3: JAVA记事本的源代码
记事本的java源代码我给记事本的java源代码你如下记事本的java源代码：/*
* 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
}
Q4: 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) {
}
}
Q5: 如何把记事本文件变成JAVA源文件
1、打开电脑，首先点击开始按钮选择打开记事本选项按钮。
2、记事本页面后写好代码之后，点击左上角的文件选项按钮。
3、写好之后点击文件下的保存选项按钮
4、这时候就要文件名的后缀改成java
5、改好之后点击保存，之后就可以变成JAVA源文件了。
记事本的java源代码的介绍就聊到这里吧，感谢你花时间阅读本站内容，更多关于记事本编写的java代码怎么运行、记事本的java源代码的信息别忘了在本站进行查找喔。
