记事本java源代码.doc

package com.wyh.day17;import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.InputEvent;import java.awt.event.KeyEvent;import java.awt.event.MouseEvent;import java.awt.event.MouseListener;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;import java.io.Reader;import java.io.Writer;import javax.swing.*;public class TestnotePad extends JFrame implements ActionListener,MouseListenerprivate JMenu file_menu,file_menu2; private JMenuItem file_new_item,file_open_item,file_save_item,file_save_as_item,page_set_item,exit; private JMenuItem cancel_item,cut_item,copy_item,paste_item,delete_item; private JPopupMenu popupmenu;/快捷菜单 private JMenuBar bar; private JTextArea textArea; private JScrollPane scroll; private File file; private JFileChooser chooser; public TestnotePad() this.setTitle(记事本); this.setIconImage(new ImageIcon(images记事本.jpg).getImage();this.setDefaultCloseOperation(EXIT_ON_CLOSE);Dimension d=new Dimension(500,400);this.setLayout(new FlowLayout();this.setSize(d);this.init();this.addListener();this.setLocationRelativeTo(null);/简单居中this.setVisible(true); public void init()bar=new JMenuBar();file_menu=new JMenu(文件);file_new_item=new JMenuItem(新建); file_open_item=new JMenuItem(打开);file_save_item=new JMenuItem(保存); file_save_as_item=new JMenuItem(另存为); exit=new JMenuItem(退出); page_set_item=new JMenuItem(页面设置); file_new_item.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,InputEvent.CTRL_MASK); file_open_item.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,InputEvent.CTRL_MASK); file_save_item.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.CTRL_MASK); file_menu.add(file_new_item);file_menu.add(file_open_item);file_menu.add(file_save_item);file_menu.add(file_save_as_item);file_menu.addSeparator(); file_menu.add(page_set_item); file_menu.add(exit); bar.add(file_menu); file_menu2=new JMenu(编辑); cancel_item=new JMenuItem(撤销); cut_item=new JMenuItem(剪切); cut_item.addActionListener(this); copy_item=new JMenuItem(复制); copy_item.addActionListener(this); paste_item=new JMenuItem(粘贴); paste_item.addActionListener(this); delete_item=new JMenuItem(删除); popupmenu=new JPopupMenu(); String menuitemstr=剪切,复制,粘贴; JMenuItem popmenuitem=new JMenuItemmenuitemstr.length; for (int i = 0; i popmenuitem.length; i+) popmenuitemi=new JMenuItem(menuitemstri); popupmenu.add(popmenuitemi); popmenuitemi.addActionListener(this); cut_item.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,InputEvent.CTRL_MASK); copy_item.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,InputEvent.CTRL_MASK); paste_item.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,InputEvent.CTRL_MASK); file_menu2.add(cancel_item); file_menu2.addSeparator(); file_menu2.add(cut_item); file_menu2.add(copy_item); file_menu2.add(paste_item); file_menu2.add(delete_item); file_menu2.addSeparator(); bar.add(file_menu2); this.setJMenuBar(bar); textArea=new JTextArea(20,40); textArea.add(popupmenu); textArea.addMouseListener(this); scroll=new JScrollPane(textArea); this.getContentPane().add(scroll); public void addListener()file_open_item.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) JFileChooser chooser=new JFileChooser();chooser.setMultiSelectionEnabled(true);int i=chooser.showOpenDialog(null);if(i=0)File f = chooser.getSelectedFile();String name = f.getName(); if (!name.endsWith(.txt) JOptionPane.showMessageDialog(null, 你打开的不是TXT文件！);return;try Reader r = new FileReader(f);BufferedReader br = new BufferedReader(r);String content = br.readLine();String t = ;while (content != null) t += content + rn; content = br.readLine();/System.out.println(content);System.out.println(t);textArea.setText(t);br.close();r.close(); catch (FileNotFoundException e1) / TODO Auto-generated catch blocke1.printStackTrace(); catch (IOException e1) / TODO Auto-generated catch blocke1.printStackTrace(););file_save_as_item.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent e) JFileChooser chooser=new JFileChooser();int i=chooser.showSaveDialog(null);File f=chooser.getSelectedFile();Writer w;try w = new FileWriter(f);w.write(textArea.getText();w.close(); catch (IOException e1) e1.printStackTrace(););public static void main(String args) new TestnotePad();Overridepublic void actionPerformed(ActionEvent e) if(e.getSource()instanceof JMenuItem)if(e.getActionCommand()=复制)textArea.copy();if(e.getActionCommand()=剪切)textArea.cut();if(e.getActionCommand()=粘贴)textArea.paste();return;Overridepublic void mouseClicked(MouseEvent mec) if(mec.getModifiers()=MouseEvent.BUTTON3_MASK)System.out.println(dianjileshubiao);popupmenu.show(textArea,mec.getX(),mec.getY();Overridepublic void mouseEntered(MouseEvent e) / TODO Auto-gene