java实现记事本.docVIP

package Proj; import javax.swing.*; import java.awt.*;//抽象窗口工具包，设计GUI的组件类 import java.awt.event.*;//提供许多事件类和处理各种事件的接口 import java.io.*;//提供流类 import javax.swing.undo.*; import javax.swing.event.*; @SuppressWarnings(serial) public class 习题8_2 extends JFrame { private UndoManager manager; private JFileChooser choose; private File selectedfile; private JTextArea text; private java.awt.Container container; private JMenuBar menuBar; private JTextField status; private boolean newPage = false; // File菜单 private JMenu menu; private JMenuItem newText; private JMenuItem open; private JCheckBoxMenuItem readOnly; private JMenuItem save; private JMenuItem saveAs; private JMenuItem exit; // Edit菜单 private JMenu edit; private JMenuItem undo; private JMenuItem redo; private JMenuItem cut; private JMenuItem copy; private JMenuItem copyAll; private JMenuItem paste; private JMenuItem delete; private JMenuItem deleteAll; private JMenuItem selectAll; private JMenuItem searchAndReplace; // 视图菜单 private JMenu view; private JCheckBoxMenuItem wrap; private JCheckBoxMenuItem onTop; private JMenuItem zoomIn; private JMenuItem zoomOut; // 工具菜单 private JMenu tool; private JMenuItem fontSum; private JMenuItem setcolor; private JMenuItem setFontColor; // 帮助菜单 private JMenu help; private JMenuItem about; // 右键菜单 private JPopupMenu pop; private JMenuItem popUndo; private JMenuItem popRedo; private JMenuItem popCut; private JMenuItem popCopy; private JMenuItem popSelectAll; private JMenuItem popCopyAll; private JMenuItem popPaste; private JMenuItem popDelete; private JMenuItem popClear; public 习题8_2() { super(记事本); try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (Exception e) { } container = getContentPane(); container.setLayout(new BorderLayout(0, -2)); manager = new UndoManager(); text = new JTextArea(); text.setFont(new Font(宋体, Font.PLAIN, 14)); text.getDocument().addUndoableEditListen