java记事本课程设计源代码1

java记事本课程 设计 领导形象设计圆作业设计ao工艺污水处理厂设计附属工程施工组织设计清扫机器人结构设计 源代码1 import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; import java.io.*; public class Notepad extends JFrame{ String openFilePath; String openFileName; String title="ERROR MESSAGE"; int type=JOptionPane.ERROR_MESSAGE; public Notepad() { super("记事本"); final JTextArea text = new JTextArea(); text.setToolTipText("记记入内容"); //界面 //退出事件 this.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); //记记的布局 final JPanel panel=new JPanel(); panel.setLayout(new GridLayout(1,1)); panel.add(new JScrollPane(text)); this.getContentPane().add(panel); //菜记记 JMenuBar Mbar = new JMenuBar(); this.setJMenuBar(Mbar); JMenu file = new JMenu("文件"); JMenu edit = new JMenu("记记"); JMenu help = new JMenu("帮助"); Mbar.add(file); Mbar.add(edit); Mbar.add(help); JMenuItem newFile = new JMenuItem("新建"); newFile.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { text.setText(" "); } }); //布局束记记 //新建文件 newFile.setMnemonic('N'); newFile.setAccelerator( KeyStroke.getKeyStroke('N',java.awt.Event.CTRL_MASK,true)); //打文件记记记 JMenuItem open = new JMenuItem("打记"); open.setMnemonic('O'); open.setAccelerator(KeyStroke.getKeyStroke('O',java.awt.Event.CTRL_MASK,true)); open.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ JFileChooser openfile = new JFileChooser(); openfile.setDialogTitle("打文件记记记"); openfile.setApproveButtonText("打记"); openfile.showOpenDialog(panel); File filename = openfile.getSelectedFile(); StringBuffer strBF = new StringBuffer(); String error_message = "Error"; FileInputStream inputfile = null; try{ char buffer[] = new char[1024]; inputfile = new FileInputStream(filename); int len = 0; FileReader in = new FileReader(filename.getAbsoluteFile()); while((len = in.read(buffer)) != -1) { strBF.append(buffer , 0 , len); } inputfile.close(); text.setText(strBF.toString()); String openfilename = filename.getName(); setTitle(openfilename); } catch(IOException ioEX) { JOptionPane.showMessageDialog(panel,error_message,title,type); } }}); //保存文件 JMenuItem save = new JMenuItem("保存"); save.setMnemonic('S'); save.setAccelerator(KeyStroke.getKeyStroke('S',java.awt.Event.CTRL_MASK,true)); save.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { JFileChooser savefile=new JFileChooser(); savefile.setApproveButtonText("保存"); savefile.setDialogTitle("保存文件"); savefile.showSaveDialog(panel); File filesa=savefile.getSelectedFile(); String file_notfound_message="找不到文件"; FileOutputStream outputfile=null; //记记记 理异常始 try { outputfile = new FileOutputStream(filesa); } catch(FileNotFoundException fe) { JOptionPane.showMessageDialog(panel,file_notfound_message,title,type); } String filecontent=text.getText(); String write_error_message="写文件记记"; try { outputfile.write(filecontent.getBytes()); } catch(IOException ioEx) { JOptionPane.showMessageDialog(panel,write_error_message,title,type); } String cmessage="记记记记"; try { outputfile.close(); } catch(IOException ioEx) { JOptionPane.showMessageDialog(panel,cmessage,title,type); } } } ); //退出 JMenuItem exit = new JMenuItem("退出"); exit.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { System.exit(0); } }); exit.setMnemonic('Q'); exit.setAccelerator(KeyStroke.getKeyStroke('Q',java.awt.Event.CTRL_MASK,true)); //记找 JMenuItem find = new JMenuItem("记找"); find.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { //因程太记记记记记.所以找功能没加上去了记记记记记记记记记记记.^_^ } }); find.setMnemonic('F'); find.setAccelerator(KeyStroke.getKeyStroke('F',java.awt.Event.CTRL_MASK,true)); //剪切 JMenuItem cut = new JMenuItem("剪切"); cut.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { text.cut(); } }); cut.setMnemonic('C'); cut.setAccelerator(KeyStroke.getKeyStroke('C',java.awt.Event.CTRL_MASK,true)); //记制 JMenuItem copy = new JMenuItem("记制"); copy.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { text.copy(); } }); copy.setMnemonic('o'); copy.setAccelerator(KeyStroke.getKeyStroke('O',java.awt.Event.CTRL_MASK,true)); //粘记 JMenuItem paste = new JMenuItem("粘记"); paste.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ text.paste(); }}); paste.setMnemonic('P'); paste.setAccelerator(KeyStroke.getKeyStroke('P',java.awt.Event.CTRL_MASK,true)); JMenuItem about = new JMenuItem("记于"); about.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ int type=JOptionPane.INFORMATION_MESSAGE; String title="记于"; String message="Make by cat lee"; JOptionPane.showMessageDialog(panel,message,title,type); }}); file.add(newFile); file.add(open); file.add(save); file.addSeparator(); file.add(exit); edit.add(cut); edit.add(copy); edit.add(paste); edit.add(find); help.add(about); } public static void main(String[] args) { Notepad notepad = new Notepad(); notepad.setSize(640, 480); notepad.setVisible(true); notepad.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } }