java 简单记事本编辑设计 5.docx

1、java 简单记事本编辑设计 5GDOU-B-11-112广东海洋大学学生实验报告书（学生用表）实验名称简单记事本编辑设计课程名称Java实验课课程号学院(系)数学与计算机学院专业计算机科学与技术班级计科11XX 学生姓名林XX学号20151162XXXX实验地点钟04002实验日期2017/11/16一、实验目的：熟悉Swing组件及相关方法：掌握常用Swing组件的菜单的使用方法、组件的事件监听方法以及主要布局管理器的使用。本实验需4学时二、实验内容：编写如下图的一个记事本，并可实现图中列出的功能。 答：源码/import java.awt.FileDialog;/import java.

2、awt.event.ActionEvent;/import java.awt.event.ActionListener;import java.awt.event.*;import java.awt.*;/import java.awt.event.KeyEvent;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.nio.file.*;import java.io.FileReader;import java.io.FileWriter;import java

3、.io.IOException;import javax.swing.*;public class NotePadDemo extends JFrame implements ActionListener JMenuBar menubar; JMenu menu1,menu2,menu3,menu4,menu5; JMenuItem item1,item2,item3,item4,item5,item6,item7,item8,item9,item10; JTextArea area; public NotePadDemo() public NotePadDemo(String s,int x

4、,int y,int h,int w) this.setTitle(s); menubar = new JMenuBar(); menu1 = new JMenu(文件); menu2 = new JMenu(编辑); menu3 = new JMenu(格式); menu4 = new JMenu(关于); item1 = new JMenuItem(新建); item2 = new JMenuItem(打开); item3 = new JMenuItem(保存); item4 = new JMenuItem(退出); item1.setAccelerator(KeyStroke.getKe

5、yStroke(KeyEvent.VK_N,InputEvent.CTRL_MASK); item2.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,InputEvent.CTRL_MASK); item3.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.CTRL_MASK); item4.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_E,InputEvent.CTRL_MASK); menu1.add(it

6、em1); menu1.add(item2); menu1.add(item3); menu1.addSeparator(); menu1.add(item4); item5 = new JMenuItem(剪切); item5.addActionListener(new ActionListener() Override public void actionPerformed(ActionEvent e) area.cut(); ); item6 = new JMenuItem(复制); item6.addActionListener(new ActionListener() Overrid

7、e public void actionPerformed(ActionEvent e) area.copy(); ); item7 = new JMenuItem(粘贴); item7.addActionListener(new ActionListener() Override public void actionPerformed(ActionEvent e) area.paste();/ 粘贴 ); item8 = new JMenuItem(查找); item9 = new JMenuItem(替换); item8.addActionListener(new ActionListen

8、er() public void actionPerformed(ActionEvent e) final JDialog dialog = new JDialog(NotePadDemo.this,查找字符串.,true); dialog.setBounds(560,250,310,130); JLabel find = new JLabel(请输入字符串 :); final JTextField findtext = new JTextField(1); JButton jbu = new JButton(查找); dialog.setLayout(null); find.setBound

9、s(10,30,90,20); findtext.setBounds(100,30,90,20); jbu.setBounds(200,30,80,20); dialog.add(find); dialog.add(findtext); dialog.add(jbu); jbu.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) String text = area.getText(); String str = findtext.getText(); int end = text.

10、length(); int len = str.length(); int start = area.getSelectionEnd(); if(start = end) start = 0; for(;start=end-len;start+) if(text.substring(start,start+len).equals(str) area.setSelectionStart(start); area.setSelectionEnd(start+len); return; /若找不到待查字符串，则将光标置于末尾 area.setSelectionStart(end); area.set

11、SelectionEnd(end); ); dialog.addWindowListener(new WindowAdapter() public void windowClosing(WindowEvent e) dialog.dispose(); ); dialog.setResizable(false); dialog.setVisible(true); ); item9.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) final JDialog dialog = new

12、JDialog(NotePadDemo.this,字符串替换.,true); dialog.setBounds(560,250,310,180); final JLabel tihuan = new JLabel(请输入要替换的字符串 ：); JLabel mubiao = new JLabel(请输入替换后的字符串 ：); JTextField jtf1 = new JTextField(10); JTextField jtf2 = new JTextField(10); JButton jb = new JButton(替换); dialog.setLayout(null); tihuan

13、.setBounds(10,30,150,20); mubiao.setBounds(10,70,150,20); jtf1.setBounds(160,30,110,20); jtf2.setBounds(160,70,110,20); jb.setBounds(100,110,80,20); dialog.add(tihuan); dialog.add(mubiao); dialog.add(jtf1); dialog.add(jtf2); dialog.add(jb); final String text = area.getText(); final String str1 = tih

14、uan.getText(); final String str2 = mubiao.getText(); jb.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) if(area.getSelectedText().equals(tihuan.getText() area.replaceRange(str2,area.getSelectionStart(),area.getSelectionEnd(); else int end=text.length(); int len=str1

15、.length(); int start=area.getSelectionEnd(); if(start=end) start=0; for(;start=end-len;start+) if(text.substring(start,start+len).equals(str1) area.setSelectionStart(start); area.setSelectionEnd(start+len); return; /若找不到待查字符串，则将光标置于末尾 area.setSelectionStart(end); area.setSelectionEnd(end); ); dialog

16、.setResizable(false); dialog.setVisible(true); ); item10 = new JMenuItem(全选); item10.addActionListener(new ActionListener() Override public void actionPerformed(ActionEvent e) area.selectAll(); ); item5.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,InputEvent.CTRL_MASK); item6.setAccelerator(K

17、eyStroke.getKeyStroke(KeyEvent.VK_C,InputEvent.CTRL_MASK); item7.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,InputEvent.CTRL_MASK); item8.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F,InputEvent.CTRL_MASK); item9.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_R,InputEvent.CTRL_MASK)

18、; item10.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A,InputEvent.CTRL_MASK); menu2.add(item5); menu2.add(item6); menu2.add(item7); menu2.add(item8); menu2.add(item9); menu2.addSeparator(); menu2.add(item10); menubar.add(menu1); menubar.add(menu2); menubar.add(menu3); menubar.add(menu4); this.

19、setJMenuBar(menubar); item1.addActionListener(this); item2.addActionListener(this); item3.addActionListener(this); item4.addActionListener(this); item5.addActionListener(this); item6.addActionListener(this); item7.addActionListener(this); item8.addActionListener(this); item9.addActionListener(this);

20、 item10.addActionListener(this); area = new JTextArea(6,12); area.setForeground(Color.WHITE); area.setBackground(Color.BLACK); area.setFont(new Font(微软雅黑, Font.PLAIN, 24); area.setLineWrap(true); this.add(new JScrollPane(area); this.setLocation(x, y); this.setSize(w, h); this.setVisible(true); this.

21、setDefaultCloseOperation(DISPOSE_ON_CLOSE); public static void main(String args) NotePadDemo jsb = new NotePadDemo(记事本,50,50,500,600); Override public void actionPerformed(ActionEvent e) / TODO Auto-generated method stub if(e.getSource() = item1) area.setText(); if(e.getSource() = item2) JFileChoose

22、r choose = new JFileChooser(); choose.setDialogTitle(打开); File file; int result = choose.showOpenDialog(NotePadDemo.this); if (result = JFileChooser.APPROVE_OPTION) area.setText(); try file = choose.getSelectedFile(); String pathStr = file.getPath(); byte b = Files.readAllBytes(Paths.get(pathStr); /

23、FileReader fr = new FileReader(file); /System.out.println(encoding: + fr.getEncoding(); /char ch = null; /fr.read(ch); String str = null; if(b!=null) str = new String(b, UTF-8); if(str!=null) area.setText(str);/ BufferedReader br = new BufferedReader(fr); / String str = null; / while (str = br.readL

24、ine() != null) / area.append(str + rn); / / 设置记事本标题 setTitle(file.getName() + 记事本); / br.close(); catch (Exception ee) ee.printStackTrace(); if(e.getSource() = item3) if (area.getText() != null & !area.getText().equals() JFileChooser choose = new JFileChooser(); int result = choose.showSaveDialog(NotePadDemo.this); if (result = JFileChooser.APPROVE_OPTION) File file; try file = choose.getSelectedFile(); BufferedWriter bw = new BufferedWriter(new FileWriter(file); bw.write(area.getText(); bw.close(); catch (IOException e1) e1.printStackTrace(); 截图成绩指导教师日期注:请用A4纸书写，不够另附纸。 第 页，共 页