Java编写的一个具有简单的编译、运行功能的记事本，java记事本,Java编写的一个具有简
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Java编写的一个具有简单的编译、运行功能的记事本，java记事本,Java编写的一个具有简
Java编写的一个具有简单的编译、运行功能的记事本。是本人Java课程设计的作品。
其中笔记本部分，来自网上其它同行分享，编译部分的功能是本人加上去的。
import java.awt.*;import java.awt.event.*;import java.io.*;class MyMenuBar extends MenuBar { public MyMenuBar(Frame parent) { parent.setMenuBar(this); } public void addMenus(String[] menus) { for (int i = 0; i < menus.length; i++) add(new Menu(menus[i])); } public void addMenuItems(int menuNumber, String[] items) { for (int i = 0; i < items.length; i++) { if (items[i] != null) getMenu(menuNumber).add(new MenuItem(items[i])); else getMenu(menuNumber).addSeparator(); } } public void addActionListener(ActionListener al) { for (int i = 0; i < getMenuCount(); i++) for (int j = 0; j < getMenu(i).getItemCount(); j++) getMenu(i).getItem(j).addActionListener(al); // 为菜单项注册动作时间监听器 }}class MyFile { FileDialog fDlg; // FileDialog 类显示一个对话框窗口，用户可以从中选择文件。 String s1; public MyFile(Frame parent, String s1) { fDlg = new FileDialog(parent, "", FileDialog.LOAD); // LOAD,此常量值指示文件对话框窗口的作用是查找要读取的文件。 this.s1 = s1; } public String getPath() { return fDlg.getDirectory() + "\\\\" + fDlg.getFile(); } public String getData() throws IOException // 当发生某种 I/O 异常时，抛出此异常。此类为异常的通用类，它是由失败的或中断的 I/O 操作生成的。 { fDlg.setTitle("打开"); fDlg.setMode(FileDialog.LOAD); // LOAD,此常量值指示文件对话框窗口的作用是查找要读取的文件。 fDlg.setVisible(true); BufferedReader br = new BufferedReader(new FileReader(getPath())); // FileReader是用来读取字符文件的便捷类 // BufferedReader是从字符输入流中读取文本，缓冲各个字符，从而提供字符、数组和行的高效读取。 StringBuffer sb = new StringBuffer(); // StringBuffer是线程安全的可变字符序列 String aline; while ((aline = br.readLine()) != null) sb.append(aline + '\\n'); // 当存在换行时,输出换行符号:\\n br.close(); // 关闭字符输入流 return sb.toString(); // 返回字符序列 } public void setData(String data) throws IOException // 当发生某种 I/O 异常时，抛出此异常。此类为异常的通用类，它是由失败的或中断的 I/O 操作生成的。 { fDlg.setTitle("保存"); fDlg.setMode(FileDialog.SAVE); // SAVE,此常量值指示文件对话框窗口的作用是查找要写入的文件。 new File(s1); fDlg.setDirectory(s1); fDlg.setVisible(true); BufferedWriter bw = new BufferedWriter(new FileWriter(getPath())); // 将文本写入字符输出流，缓冲各个字符，从而提供单个字符、数组和字符串的高效写入。 bw.write(data); // 写入字符串 bw.close(); // 关闭该流 }}class MyFindDialog extends Dialog implements ActionListener { Label lFind = new Label("查找字符串"); Label lReplace = new Label("替换字符串"); TextField tFind = new TextField(10); TextField tReplace = new TextField(10); Button bFind = new Button("查找"); Button bReplace = new Button("替换"); TextArea ta; public MyFindDialog(Frame owner, TextArea ta) { super(owner, "查找", false); this.ta = ta; setLayout(null); lFind.setBounds(10, 30, 80, 20); lReplace.setBounds(10, 70, 80, 20); tFind.setBounds(90, 30, 90, 20); tReplace.setBounds(90, 70, 90, 20); bFind.setBounds(190, 30, 80, 20); bReplace.setBounds(190, 70, 80, 20); add(tFind); add(bFind); add(lReplace); add(tReplace); add(bReplace); setResizable(false); bFind.addActionListener(this); bReplace.addActionListener(this); tFind.addActionListener(this); tReplace.addActionListener(this); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { MyFindDialog.this.dispose(); } }); }// 构造函数结束 public void showFind() { setTitle("查找"); setSize(280, 60); setVisible(true); } public void showReplace() { setTitle("替换"); setSize(280, 110); setVisible(true); } public void find() { String text = ta.getText(); String str = tFind.getText(); int end = text.length(); int len = str.length(); int start = ta.getSelectionEnd(); if (start == end) start = 0; for (; start <= end - len; start++) { if (text.substring(start, start + len).equals(str)) { ta.setSelectionStart(start); ta.setSelectionEnd(start + len); return; } } // 若找不到待查字符串，则将光标置于末尾 ta.setSelectionStart(end); ta.setSelectionEnd(end); } public Button getBFind() { return bFind; } public void replace() { String str = tReplace.getText(); if (ta.getSelectedText().equals(tFind.getText())) ta.replaceRange(str, ta.getSelectionStart(), ta.getSelectionEnd()); else find(); } public void actionPerformed(ActionEvent e) { if (e.getSource() == bFind || e.getSource() == tFind) { find(); } else if (e.getSource() == bReplace || e.getSource() == tReplace) { replace(); } }}public class MyDesign extends Frame implements ActionListener, KeyListener { String s = "/*Example*/\\n" + "public class E\\n" + "{\\n" + "\\tpublic static void main(String args[])\\n" + "\\t{\\n" + "\\t\\tSystem.out.println(\\"Hello,Java\\");\\n" + "\\t}\\n" + "}"; // 设置默认的显示的代码 static String s1 = "C:\\\\1000"; // 设置默认路径为：C:\\1000 static boolean boo = true; static FileDialog fDlg; // FileDialog 类显示一个对话框窗口，用户可以从中选择文件。 TextArea editor = new TextArea(s); // 可编辑的editor TextArea editor1 = new TextArea(); MyFile mf = new MyFile(this, s1); // MyFile对象 MyFindDialog findDlg = new MyFindDialog(this, editor); public MyDesign(String title) { super(title); MyMenuBar mb = new MyMenuBar(this); // 添加需要的菜单及菜单项 mb.addMenus(new String[] { "文件", "编辑", "查找", "编译" }); mb.addMenuItems(0, new String[] { "新建", null, "打开" }); mb.addMenuItems(1, new String[] { "清除", null, "全选", null, "清空" }); mb.addMenuItems(2, new String[] { "查找", null, "替换" }); mb.addMenuItems(3, new String[] { "保存", null, "调试", "运行" }); editor.setFont(new Font("Calibri", Font.PLAIN, 20)); editor1.setFont(new Font("Arial", Font.PLAIN, 12)); setBounds(200, 150, 750, 470); add(editor, BorderLayout.CENTER); add(editor1, BorderLayout.SOUTH); editor.addKeyListener(this); // 文本区editor注册监视器 editor1.setEditable(false); // 设置editor1不可编辑 setVisible(true); validate(); mb.addActionListener(this); // 为菜单项注册动作时间监听器 addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); } public void actionPerformed(ActionEvent e) { String selected = e.getActionCommand(); // 获取菜单项标题 if (selected.equals("新建")) editor.setText(""); else if (selected.equals("打开")) { try { editor.setText(mf.getData()); } catch (IOException ie) { editor1.append("\\n系统出错！"); } } else if (selected.equals("保存")) { try { mf.setData(editor.getText()); } catch (IOException ie) { editor1.append("\\n系统出错！"); } } else if (selected.equals("调试")) { try { Runtime ce = Runtime.getRuntime(); Process process = ce.exec("javac " + mf.getPath()); BufferedInputStream is = new BufferedInputStream( process.getErrorStream()); byte[] buf = new byte[4096]; int n = -1; boolean boo1 = true; while ((n = is.read(buf, 0, buf.length)) != -1) { editor1.append('\\n' + new String(buf, 0, n)); // 将错误流输出 boo = false; boo1 = false; } if (boo1) { editor1.append("\\n调试成功！"); boo = true; } else { editor1.append("\\n调试失败！"); boo1 = true; } is.close(); process.destroy(); } catch (Exception e1) { editor1.append("\\n系统出错！"); } } else if (selected.equals("运行")) { if (boo) { try { Runtime ce = Runtime.getRuntime(); byte[] buf = new byte[4096]; int n = -1; String s1 = mf.getPath(); int i=s1.lastIndexOf("\\\\"); int j=s1.lastIndexOf("."); String s2 = s1.substring(i+1, j); //取出文件名，存入s2 Process process1 = ce.exec("java " + s2); BufferedInputStream bis = new BufferedInputStream( process1.getInputStream()); while ((n = bis.read(buf, 0, buf.length)) != -1) { editor1.append('\\n' + new String(buf, 0, n)); } bis.close(); process1.destroy(); //杀死进程 } catch (Exception e2) { editor1.append("\\n系统出错！"); } } else editor1.append("\\n请先调试！"); } else if (selected.equals("清除")) { editor.replaceRange("", editor.getSelectionStart(), editor.getSelectionEnd()); } else if (selected.equals("清空")) { editor1.setText(null); } else if (selected.equals("全选")) { editor.setSelectionStart(0); editor.setSelectionEnd(editor.getText().length()); } else if (selected.equals("查找")) { findDlg.showFind(); } else if (selected.equals("替换")) { findDlg.showReplace(); } } public void keyPressed(KeyEvent e3) { if (e3.getModifiers() == InputEvent.CTRL_MASK && e3.getKeyCode() == KeyEvent.VK_S) { try { mf.setData(editor.getText()); } catch (IOException ie) { editor1.append("\\n系统出错！"); } } } public void keyTyped(KeyEvent e4) { } public void keyReleased(KeyEvent e5) { } public static void main(String[] args) { new MyDesign("简单的Java IDE"); }}//该片段来自于http://byrx.net
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