用java写的Notepad简单实现版

用java写记事本(NotePad)

原工程地址：（仅供参考）http://download.csdn.net/detail/u012332962/6519641

         这个本人第一个用java写的比较有用的程序,可用来实现某种功能目的,同时也让我更加深入地了解和掌握了java的基本语法,这重要的是本程序使我对枯燥的程序设计产生并且保持了一定的浓厚设计兴趣;

 

本程序设计的程序界面: (很类似windows下面的NotePad 记事本程序吧,其实就是仿造notePad 一个java的基础程序设计,用与巩固自己的java基础,希望自己能学好java,同时放出来,希望大家能指点指点,本人虚心请教!)

程序的界面设计使用了swing,因为大家都说AWT早就过时了,我也就顺应潮流吧,与时俱进是打算做好这一行的人的基本要求吧.废话不多说;进行基础的讲解:

本程序实现了记事本的基本功能,能创建和打开记事本文件,和判断是否 保存安全退出,同时实现了,记事本的换行功能,和添加了右键的菜单管理,最后还添加了菜单的热键,不过还没有完善所有菜单命令的功能,只是把简单的菜单功能接口实现,时间原因未能实现一下拓展的功能如换字体,复制和剪贴等功能..详细界面及功能如下:

1.整体界面:

2.菜单栏:3

3.设置的换行效果功能

4.未保存而退出的效果,

很多的菜单功能都未能实现,日后慢慢补上:比如右键菜单.

本程序,主要就是界面设计,和一些IO文件操作,以及事件监听后的响应操作,所有菜单操作都是事件监听的类型;只是还能未被实现,哈哈,实现方法都大同小异!了解这些都基本上可以实现全部了,剩下的就是时间的问题了,(有时间我会补完全部功能)

package com.rainplus;import java.awt.BorderLayout;import java.awt.Font;import java.awt.GraphicsEnvironment;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.InputEvent;import java.awt.event.MouseEvent;import java.awt.event.MouseListener;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;public class Notepad extends JFrame {JPanel content;JMenuBar menuBar;JMenuItem lineWrap;JScrollPane scrollPane;JTextArea text;JPopupMenu popupMenu;static Notepad notepad;final static String author = "Notepad-Rainplus";boolean isNew = false;File file;JFileChooser fileChooser = new JFileChooser();public Notepad() {super("Notepad-Rainplus");this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);setSize(800, 600);getContentPane().add(content = new JPanel());/* 在内容面板中添加:菜单和文本编辑区 */content.setLayout(new BorderLayout(2, 2));content.add(menuBar = new JMenuBar(), BorderLayout.NORTH);content.add(scrollPane = new JScrollPane(text = new JTextArea()),BorderLayout.CENTER);/* 向菜单栏添加菜单和菜单项 */String[] menusStrings = { "文件(F)", "编辑(E)", "格式(O)", "查看(V)", "帮助(H)" };String[][] itemStrings = {{ "新建(N)", "打开(O)", "-", "保存(S)", "另存为(A)", "-", "打印(P)","页面设置(U)", "-", "退出(X)" },{ "撤销(U)", "-", "剪贴(T)", "复制(C)", "粘贴(P)", "删除(D)", "全选(A)","-", "日期(D)" }, { "字体(F)", "自动换行(W)" },{ "查找(F)", "查找下一个(N)", "转到(G)", "替换(R)" },{ "查看帮助(H)", "有关Notepad(A)" } };int[] menukeys = { 'F', 'E', 'O', 'V', 'H' };int[][] itemkeys = {{ 'N', 'O', ' ', 'S', 'A', ' ', 'P', 'U', ' ', 'X' },{ 'U', ' ', 'T', 'C', 'P', 'D', 'A', ' ', 'D' }, { 'F', 'W' },{ 'F', 'N', 'G', 'R' }, { 'H', 'A' } };for (int i = 0; i < menusStrings.length; i++) {JMenu menu = new JMenu(menusStrings[i]);menu.setMnemonic(menukeys[i]);menuBar.add(menu);for (int j = 0; j < itemStrings[i].length; j++) {if ("-" == itemStrings[i][j]) {menu.addSeparator();} else {JMenuItem item = new JMenuItem(itemStrings[i][j]);item.setAccelerator(KeyStroke.getKeyStroke((char) itemkeys[i][j], InputEvent.CTRL_MASK));item.addActionListener(new MenuAction());menu.add(item);if ("自动换行(W)" == itemStrings[i][j]) {lineWrap = item;}}}}/* 向text文本去内设置右键弹出菜单 */String[] popUpStrings = { "撤销(U)", "-", "剪贴(T)", "复制(C)", "粘贴(P)","删除(D)", "-", "全选(A)" };int[] popUpKeys = { 'U', ' ', 'T', 'C', 'P', 'D', ' ', 'A' };popupMenu = new JPopupMenu();for (int i = 0; i < popUpStrings.length; i++) {if ("-" == popUpStrings[i]) {popupMenu.addSeparator();} else {JMenuItem menuItem = new JMenuItem(popUpStrings[i]);menuItem.addActionListener(new pupUpAciton());menuItem.setAccelerator(KeyStroke.getKeyStroke((char) popUpKeys[i]));popupMenu.add(menuItem);}}/* 给文本编辑区添加右键点击事件响应 */text.addMouseListener(new TextMouse());text.setFont(new Font("SansSerif", Font.PLAIN, 16));setVisible(true);setLocationRelativeTo(null);}public Notepad(String fileName) {this();file = new File(fileName);if (file.exists()) {text.setText(readFromFile(file));setTitle(author + "--" + file.getName());} else {file = new File("新建文档.txt");setTitle(author + "" + "-----" + "新建文档.txt");isNew = true;}}public String readFromFile(File file2) {char[] ch = null;try {FileReader fin = new FileReader(file);ch = new char[(int) file.length()];fin.read(ch);fin.close();} catch (FileNotFoundException fe) {JOptionPane.showMessageDialog(notepad, "\"+找不到" + file.getName());} catch (IOException e) {JOptionPane.showMessageDialog(notepad, "\"IO出错,读取" + file.getName()+ "\"");}return new String(ch);}public void writeToFile() {String textContent = text.getText();try {FileWriter fout = new FileWriter(file);fout.write(textContent);fout.close();} catch (IOException e) {JOptionPane.showMessageDialog(notepad, "\"IO出错,写入" + file.getName()+ "不成功\"");}}public boolean isSave() {char[] ch = null;try {FileReader fin = new FileReader(file);ch = new char[(int) file.length()];fin.read(ch);fin.close();} catch (FileNotFoundException fe) {} catch (IOException e) {}return new String(ch).equals(text.getText());}public static void main(String[] args) {if (0 == args.length) {notepad = new Notepad("新建文档.txt");} else {notepad = new Notepad(args[0]);}}class TextMouse implements MouseListener {@Overridepublic void mouseClicked(MouseEvent e) {if (MouseEvent.BUTTON3 == e.getButton()) {popupMenu.show(text, e.getX(), e.getY());}}@Overridepublic void mouseReleased(MouseEvent e) {}@Overridepublic void mousePressed(MouseEvent e) {}@Overridepublic void mouseExited(MouseEvent e) {}@Overridepublic void mouseEntered(MouseEvent e) {}}class MenuAction implements ActionListener {@Overridepublic void actionPerformed(ActionEvent e) {if ("新建(N)" == e.getActionCommand()) {String fileName = JOptionPane.showInputDialog("输入文件的名字:","新建文档.txt");file = new File(fileName);try {file.createNewFile();} catch (IOException e1) {}notepad.setTitle(author + "-----" + file.getAbsolutePath());}if ("打开(O)" == e.getActionCommand()) {if (JFileChooser.APPROVE_OPTION == fileChooser.showOpenDialog(notepad)) {file = fileChooser.getSelectedFile();text.setText(readFromFile(file));notepad.setTitle(author + "-----" + file.getAbsolutePath());isNew=false ;}}if ("保存(S)" == e.getActionCommand()) {writeToFile();isNew=false ;}if ("另存为(A)" == e.getActionCommand()) {if (JFileChooser.APPROVE_OPTION == fileChooser.showSaveDialog(notepad)) {file = fileChooser.getSelectedFile();writeToFile();notepad.setTitle(author + "-----" + file.getAbsolutePath());isNew=false ;}}if ("打印(P)" == e.getActionCommand()) {// TODO}if ("页面设置(U)" == e.getActionCommand()) {// TODO}if ("退出(X)" == e.getActionCommand()) {int rec;if (isNew) {rec = JOptionPane.showConfirmDialog(null, "是否需要保存并退出");if (0 == rec) {writeToFile();System.exit(0);} else if (1 == rec) {System.exit(0);}return ;}if (isSave()) {System.exit(0);} else {rec = JOptionPane.showConfirmDialog(null, "是否需要保存并退出");if (0 == rec) {writeToFile();System.exit(0);} else if (1 == rec) {System.exit(0);}}}if ("撤销(U)" == e.getActionCommand()) {// TODO}if ("剪贴(T)" == e.getActionCommand()) {text.cut();}if ("复制(C)" == e.getActionCommand()) {text.copy();}if ("粘贴(P)" == e.getActionCommand()) {text.paste();}if ("删除(D)" == e.getActionCommand()) {// TODO}if ("全选(A)" == e.getActionCommand()) {// TODO}if ("日期(D)" == e.getActionCommand()) {// TODO}if ("字体(F)" == e.getActionCommand()) {// TODO// GraphicsEnvironment ge = GraphicsEnvironment// .getLocalGraphicsEnvironment();// String[] fontNames = ge.getAvailableFontFamilyNames(); //// 获得系统中所有字体的名字；}if ("自动换行(W)" == e.getActionCommand()) {text.setLineWrap(true);lineWrap.setText("√自动换行(W)");}if ("√自动换行(W)" == e.getActionCommand()) {text.setLineWrap(false);lineWrap.setText("自动换行(W)");}if ("查找(F)" == e.getActionCommand()) {// TODO}if ("查找下一个(N)" == e.getActionCommand()) {// TODO }if ("转到(G)" == e.getActionCommand()) {// TODO}if ("替换(R)" == e.getActionCommand()) {// TODO}if ("查看帮助(H)" == e.getActionCommand()) {JOptionPane.showMessageDialog(null, "详情参考windowsnotepad的用法");}if ("有关Notepad(A)" == e.getActionCommand()) {JOptionPane.showMessageDialog(null,"仿制windows Notepad\n       基本实现全部功能\n"+ "                          作者:Rainplus");}}}}class pupUpAciton implements ActionListener {@Overridepublic void actionPerformed(ActionEvent e) {if ("撤销(U)" == e.getActionCommand()) {// TODO}if ("剪贴(T)" == e.getActionCommand()) {text.cut();}if ("复制(C)" == e.getActionCommand()) {text.copy();}if ("粘贴(P)" == e.getActionCommand()) {text.paste();}if ("删除(D)" == e.getActionCommand()) {// TODO}if ("全选(A)" == e.getActionCommand()) {// TODO}}}}