用java写的简易记事本

import java.awt.*; import javax.swing.*; import java.awt.event.*; import java.lang.String; import java.io.*; public class JAVAEdit extends JFrame { JTextArea jta; private JFrame frame; JPopupMenu pop = new JPopupMenu();//定义快捷菜单用 private JComboBox combox, combox1;//组合框,获取系统字体使用 private JToolBar toolbar;//定义工具栏 private JComboBox sizes, sizes1; // 字号组合框 private JDialog dialog; //定义查找时所用窗体 private JTextField textField;//输入时的文本框 private FileDialog filedialog; private JOptionPane optionpane;//关于时输出对话框 boolean flag=false; Font font = new Font("楷书", Font.BOLD, 16); // 储存字体 String filename= "",name; //文件名 // ***************************************构造函数 public JAVAEdit() { frame = new JFrame("JAVA 代码编译器 - [无标题] "); jta = new JTextArea("", 100, 30); // 构建一个开始为空，默认 100 行，30 列 JScrollPane jsp = new JScrollPane(jta); JMenuBar jmb = new JMenuBar(); JMenu mFile = new JMenu("文件"); JMenu mEdit = new JMenu("编辑"); JMenu mForm = new JMenu("格式"); JMenu mFind = new JMenu("查找"); JMenu mHelp=new JMenu("帮助"); // ********************************************************************************工具栏 GraphicsEnvironment g = GraphicsEnvironment .getLocalGraphicsEnvironment(); String[] fontname = g.getAvailableFontFamilyNames(); // 获取系统字体 combox = new JComboBox(fontname); // 组合框获取系统字体 toolbar = new JToolBar(); toolbar.setFloatable(true); // 设置窗口的浮动 String size[] = { "20", "30", "40", "50", "60", "70" }; sizes = new JComboBox(size); // 字号组合框 sizes.setEditable(true); // 设置组合框可编辑 JButton news = new JButton(new ImageIcon("images/new.gif")); news.setToolTipText("新建"); JButton open = new JButton(new ImageIcon("images/open.gif")); open.setToolTipText("打开"); JButton save = new JButton...