JAVA记事本问题
import java.awt.*;import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import *;
import java.text.SimpleDateFormat;
import java.util.Calendar;
public class MyNoteBook extends JFrame implements ActionListener
{
String title="ERROR MESSAGE";
int type=JOptionPane.ERROR_MESSAGE;
static String Path;
public MyNoteBook()
{
final JFrame frame = new JFrame("我的记事本");
final JTextArea text=new JTextArea();
frame.setSize(600, 500);
frame.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
JPanel panel=new JPanel();
panel.setLayout(new GridLayout(1,1));
panel.add(new JScrollPane(text));
frame.getContentPane().add(panel);
JMenuBar Mbar = new JMenuBar();
frame.setJMenuBar(Mbar);
JMenu jfile = new JMenu("文件(F)", true);
JMenu jedit = new JMenu("编辑(E)", true);
JMenu jmode = new JMenu("格式(O)", true);
JMenu jhelp = new JMenu("帮助(H)", true);
jfile.setMnemonic('F');
jedit.setMnemonic('E');
jmode.setMnemonic('O');
jhelp.setMnemonic('H');
Mbar.add(jfile);
Mbar.add(jedit);
Mbar.add(jmode);
Mbar.add(jhelp);
JMenuItem jnew = new JMenuItem("新建");
jnew.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
text.setText(" ");
}
});
jnew.setMnemonic('N');
jnew.setAccelerator( KeyStroke.getKeyStroke('N',java.awt.Event.CTRL_MASK,true));
JMenuItem jopen = new JMenuItem("打开");
jopen.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
JFileChooser openfile=new JFileChooser();
openfile.setDialogTitle("打开文件");
openfile.setApproveButtonText("打开");
openfile.showOpenDialog(frame);
File file=openfile.getSelectedFile();
FileInputStream inputfile=null;
String message="The file not Found";
try
{
inputfile=new FileInputStream(file);
}
catch(FileNotFoundException fe)
{
JOptionPane.showMessageDialog(frame,message,title,type);
}
int readbytes;
String message1="read file error";
try
{
while((readbytes=inputfile.read())!=-1)
{
text.append(String.valueOf((char)readbytes));
}
}
catch(IOException ioe)
{
JOptionPane.showMessageDialog(frame,message1,title,type);
}
String closemessage="close stream error";
try{
inputfile.close();
}
catch(IOException ioe)
{
JOptionPane.showMessageDialog(frame,closemessage,title,type);
}
}
});
jopen.setMnemonic('O');
jopen.setAccelerator(KeyStroke.getKeyStroke('O',java.awt.Event.CTRL_MASK,true));
JMenuItem jsave = new JMenuItem("保存");
jsave.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
JFileChooser savefile=new JFileChooser();
savefile.setApproveButtonText("保存");
savefile.setDialogTitle("保存文件");
savefile.showSaveDialog(frame);
File filesa=savefile.getSelectedFile();
String messagef="File not Found";
FileOutputStream outputfile=null;
try
{
outputfile=new FileOutputStream(filesa);
}
catch(FileNotFoundException fe)
{
JOptionPane.showMessageDialog(frame,messagef,title,type);
}
String filecontent=text.getText();
String wrmessage="write error";
try
{
outputfile.write(filecontent.getBytes());
}
catch(IOException ioe)
{
JOptionPane.showMessageDialog(frame,wrmessage,title,type);
}
String cmessage="close stream error";
try
{
outputfile.close();
}
catch(IOException ioe)
{
JOptionPane.showMessageDialog(frame,cmessage,title,type);
}
}
});
jsave.setMnemonic('S');
jsave.setAccelerator(KeyStroke.getKeyStroke('S',java.awt.Event.CTRL_MASK,true));
JMenuItem jothersava = new JMenuItem("另存为...");
jothersava.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
}
});
JMenuItem jquite = new JMenuItem("退出");
jquite.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
/*int i=JOptionPane.showConfirmDialog(this,"确定要退出吗?","关闭",JOptionPane.YES_NO_OPTION);
if(i==JOptionPane.YES_OPTION)*/
System.exit(0);
}
});
jquite.setMnemonic('Q');
jquite.setAccelerator(KeyStroke.getKeyStroke('Q',java.awt.Event.CTRL_MASK,true));
JMenuItem jcut = new JMenuItem("剪切");
jcut.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
text.cut();
}
});
jcut.setMnemonic('C');
jcut.setAccelerator(KeyStroke.getKeyStroke('C',java.awt.Event.CTRL_MASK,true));
JMenuItem jcopy = new JMenuItem("复制");
jcopy.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
text.copy();
}
});
jcopy.setMnemonic('o');
jcopy.setAccelerator(KeyStroke.getKeyStroke('O',java.awt.Event.CTRL_MASK,true));
JMenuItem jpaste = new JMenuItem("粘贴");
jpaste.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
text.paste();
}
});
jpaste.setMnemonic('P');
jpaste.setAccelerator(KeyStroke.getKeyStroke('P',java.awt.Event.CTRL_MASK,true));
JMenuItem jallselect = new JMenuItem("全选");
jallselect.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
text.selectAll();
}
});
jallselect.setMnemonic('A');
jallselect.setAccelerator(KeyStroke.getKeyStroke('A',java.awt.Event.CTRL_MASK,true));
JMenuItem jtimeDate = new JMenuItem("插入日期时间");
jtimeDate.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy'年'MM'月'dd'日'+HH:mm:ss");
Calendar today = Calendar.getInstance();
String timeDate = dateFormat.format(today.getTime());
text.append(timeDate);
}
});
jtimeDate.setMnemonic('D');
jtimeDate.setAccelerator(KeyStroke.getKeyStroke('D',java.awt.Event.CTRL_MASK,true));
JMenuItem jnewline = new JMenuItem("自动换行");
jnewline.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
text.setLineWrap(true);
}
});
JMenuItem jabout = new JMenuItem("帮助");
jabout.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
int type=JOptionPane.INFORMATION_MESSAGE;
String title="关于";
String message="我的记事本";
JOptionPane.showMessageDialog(frame,message,title,type);
}
});
jfile.add(jnew);
jfile.add(jopen);
jfile.add(jsave);
jfile.add(jothersava);
jfile.addSeparator();
jfile.add(jquite);
jedit.add(jcut);
jedit.add(jcopy);
jedit.add(jpaste);
jedit.addSeparator();
jedit.add(jallselect);
jedit.add(jtimeDate);
jmode.add(jnewline);
jhelp.add(jabout);
frame.setVisible(true);
}
public static void main(String[] args)
{
MyNoteBook myNoteBook = new MyNoteBook();
myNoteBook.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
if(!MyNoteBook.JTGhost.getText().equals(MyNoteBook.text.getText()))
{
int Choose=JOptionPane.showConfirmDialog(myNoteBook,"文字已经改变，是否需要保存！","记事本",JOptionPane.YES_NO_CANCEL_OPTION);
//选择需要保存。
if(Choose==JOptionPane.YES_OPTION)
{
try
{
FileDialog FDlog=new FileDialog(myNoteBook,"保存文件",FileDialog.SAVE);
FDlog.setVisible(true);
MyNoteBook.Path=FDlog.getDirectory()+FDlog.getFile();
FileWriter FW=new FileWriter(MyNoteBook.Path);
FW.write(WordPad.JT.getText());
FW.close();
//退出程序
System.exit(0);
}
catch(Exception s1)
{
}
}
//不保存，直接退出。
else if(Choose==JOptionPane.NO_OPTION)
{
System.exit(0);
}
//不进行任何操作。
else if(Choose==JOptionPane.CANCEL_OPTION)
{
}
}
//文件已经保存，则直接退出。
else
{
System.exit(0);
}
}
});
}
}
不知道要怎么改了，好多错，请高手帮忙下，谢谢
