Java程序设计实验报告文本编辑器的设计与实现.docx

Java程序设计实验报告文本编辑器的设计与实现Java程序设计实验报告文本编辑器的设计与实现 Java程序设计实验报告 学生姓名：邵强学号：课程编号：06021801-0实验名称：文本编辑器的设计与实现实验内容：设计与实现一个文本编辑器，要求具有方便的图形用户界面，包括标题栏、菜单栏，菜单栏有相关的菜单和菜单项，有快捷键，具有编辑、打开、保存、复制、粘贴等功能（详细功能要求经过运行提供的字节码文件来确定，主类是JNotePadUI）完成有关类的设计，并调试运行，给出有代表性的程序输出结果（程序运行截图）程序代码如下：package note;import java.awt.*;import java.awt.event.*;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.FileWriter;import java.io.IOException; import java.io.*; import javax.swing.*;public class Mynote extends JFrame implements ActionListener{ JMenu menuFile; JMenu menuEdit ; JMenu menuAbout; JPopupMenu popUpMenu;JTextArea txt=null; //编辑区JLabel lab=new JLabel("未修改");JFileChooser fileChooser = new JFileChooser();File saveFileName = null, fileName = null;public Mynote(String s){super(s);createMenuBar(); //菜单栏createContentPane(); //文本编辑区组件setBounds(100,100,600,450);addWindowListener(new WindowAdapter(){public void windowClosing(WindowEvent e){ closeFile(); } });setVisible(true); }public void createMenuBar() { JMenuBar menuBar = new JMenuBar(); menuFile = new JMenu("文件");menuEdit = new JMenu("编辑");menuAbout= new JMenu("关于");menuBar.add(menuFile);menuBar.add(menuEdit);menuBar.add(menuAbout);JMenuItem itemOpen = new JMenuItem("打开"); menuFile.add(itemOpen);itemOpen.addActionListener(this);menuFile.addSeparator();JMenuItem itemSave = new JMenuItem("保存");menuFile.add(itemSave);itemSave.addActionListener(this);JMenuItem itemSaveas=new JMenuItem("另存为"); menuFile.add(itemSaveas);itemSaveas.addActionListener(this);menuFile.addSeparator();JMenuItem itemQuit = new JMenuItem("关闭");menuFile.add(itemQuit);itemQuit.addActionListener(this); JMenuItem itemCut = new JMenuItem("剪切"); menuEdit.add(itemCut);itemCut.addActionListener(this);JMenuItem itemCopy = new JMenuItem("复制");menuEdit.add(itemCopy);itemCopy.addActionListener(this);JMenuItem itemPaste= new JMenuItem("粘贴");menuEdit.add(itemPaste);itemPaste.addActionListener(this);JMenuItem itemAboutnote = new JMenuItem("关于NotePad");menuAbout.add(itemAboutnote);itemAboutnote.addActionListener(this);//右键菜单JMenuItem Copyitem=new JMenuItem("复制");Copyitem.addActionListener(this);JMenuItem Cutitem=new JMenuItem("剪切");Cutitem.addActionListener(this);JMenuItem Pasteitem=new JMenuItem("粘贴"); Pasteitem.addActionListener(this); popUpMenu=new JPopupMenu();popUpMenu.add(Copyitem);popUpMenu.add(Cutitem);popUpMenu.add(Pasteitem);//快捷键itemOpen.setAccelerator(KeyStroke.getKeyStroke(O,Event.CTRL_MAS K,false));itemSave.setAccelerator(KeyStroke.getKeyStroke(S,Event.CTRL_MASK ,false));itemSaveas.setAccelerator(KeyStroke.getKeyStroke(A,Event.CTRL_MA SK,false));itemQuit.setAccelerator(KeyStroke.getKeyStroke(Q,Event.CTRL_MAS K,false));itemCut.setAccelerator(KeyStroke.getKeyStroke(X,Event.CTRL_MASK, false));itemCopy.setAccelerator(KeyStroke.getKeyStroke(C,Event.CTRL_MAS K,false));itemPaste.setAccelerator(KeyStroke.getKeyStroke(V,Event.CTRL_MAS K,false));setJMenuBar(menuBar);} private boolean isChanged() {if(lab.getText().equals("未修改"))return false;else return true;}public void actionPerformed(ActionEvent e){int option=-1;if(e.getActionCommand().equals("打开")) option=0;if(e.getActionCommand().equals("保存")) option=1;if(e.getActionCommand().equals("另存为")) option=2;if(e.getActionCommand().equals("关闭")) option=3;if(e.getActionCommand().equals("剪切")) option=4;if(e.getActionCommand().equals("复制")) option=5; if(e.getActionCommand().equals("粘贴")) option=6;if(e.getActionCommand().equals("关于NotePad")) option=7;switch(option){case 0:{if(!isChanged()){ open(); }else{ int option2=JOptionPane.showConfirmDialog(this,"文件已修改，是否保存?","保存文件？",JOptionPane.YES_NO_OPTION,JOptionPane.WARNING_MESSAGE,null);switch(option2){case JOptionPane.YES_OPTION:saveFile();//保存文件break;case JOptionPane.NO_OPTION:open();break; } }break;}case 1:saveFile();break;case 2:saveFileAs();break;case 3:closeFile();break;case 4:Cut();break;case 5:Copy();break;case 6:Paste();break;case 7:about();break;default:break;}}public void createContentPane() //文本编辑区组件 { JScrollPane scrollPane; //滑动条txt = new JTextArea(10,30);txt.setEditable(true);txt.setFont(new Font("宋体",Font.PLAIN,18));txt.setLineWrap(true);scrollPane = new JScrollPane(txt);add(scrollPane, BorderLayout.CENTER);add(lab,BorderLayout.SOUTH);txt.addKeyListener(new KeyAdapter(){public void keyTyped(KeyEvent e){ lab.setText("已修改"); }});txt.addMouseListener(new MouseAdapter(){public void mouseReleased(MouseEvent e){if(e.getButton()==MouseEvent.BUTTON3。