Use AWT to write your fourth graphical interface in Java--a simple Notepad

Made a simple Notepad, can be simple to open the file, edit the file, save the file, but how can not solve the problem of Chinese garbled, ask everyone advice ...

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Package com.xywei.awt;

Import Java.awt.FileDialog;
Import Java.awt.Frame;
Import Java.awt.Menu;
Import Java.awt.MenuBar;
Import Java.awt.MenuItem;
Import Java.awt.TextArea;
Import java.awt.event.ActionEvent;
Import Java.awt.event.ActionListener;
Import Java.awt.event.WindowAdapter;
Import java.awt.event.WindowEvent;
Import Java.io.BufferedReader;
Import Java.io.File;
Import Java.io.FileInputStream;
Import java.io.FileNotFoundException;
Import Java.io.FileOutputStream;
Import java.io.IOException;
Import Java.io.InputStreamReader;
Import Java.io.OutputStreamWriter;
Import java.io.UnsupportedEncodingException;

/**
*
* @author Welins Write a simple notepad of your own,
*
*/
public class Mynotepad {

Private frame FR = new frame ();
Private MenuBar mbar = new MenuBar ();
Private menu mu = new menu ();
Private MenuItem Clsitem = new MenuItem ();
Private MenuItem SaveItem = new MenuItem ();
Private MenuItem Opnitem = new MenuItem ();
Private TextArea txae = new TextArea ();
To open a file that involves IO
private file file;
A saved or opened dialog box
Private FileDialog Opendia,savedia;
Private FileDialog opndial, savedial;

public void Mynotepad () {
Fr.settitle ("My Notepad");
Fr.setbounds (400, 100, 600, 400);
Fr.setvisible (TRUE);
Fr.setmenubar (mbar);

Mu.setlabel ("select");

Mbar.add (MU);
Opnitem.setlabel ("open");
Mu.add (Opnitem);
Saveitem.setlabel ("Save");
Mu.add (SaveItem);
Clsitem.setlabel ("Off");
Mu.add (Clsitem);
Add text to the frame window
Fr.add (txae);

opndial = new FileDialog (FR, "open", filedialog.load);
savedial = new FileDialog (FR, "save", Filedialog.save);

Event ();
}

public void Event () {
Fr.addwindowlistener (New Windowadapter () {
public void windowclosing (WindowEvent e) {
System.out.println ("Ready to close the window = = =");
System.out.println ("window closed, program exited");
System.exit (0);
}
});

Clsitem.addactionlistener (new ActionListener () {
@Override
public void actionperformed (ActionEvent e) {
TODO auto-generated Method Stub
System.exit (0);
}
});

Read File operation
Opnitem.addactionlistener (new ActionListener () {

@Override
public void actionperformed (ActionEvent e) {
//Call system function, implement open file
//TODO auto-generated method stub
Opndial.setvisible (TRUE);
//Get directories and files
String dir = opndial.getdirectory ();
String fileName = Opndial.getfile ();
System.out.println ("The directory of your selected files is:" + dir + "file is:" + fileName);
//Select OK and then appear in the Text field, first do the empty processing
Txae.settext (null);
Obtain the appropriate file by path and file name
File = new file (dir, filename);
The following involves the IO stream operation, open the file, whether to open in bytes or characters or a line of good?
//It is easier to read one line at a time
/**
*//Convert the file into an input stream inputstreamreader instrread = new
* InputStreamReader (New Fileinputstrea m (file), encoding); The
* Next changes the input to a byte stream bufferedreader bufread = new
* BufferedReader (Instrread);//strings string linetxt = null;
* * while ((Linetxt = Bufread.readline ()) = null) {
* SYSTEM.OUT.PRINTLN (Linetxt)}///After reading, you must close the read stream
* bufread.cl OSE (); Instrread.close ();
*/

String encoding = "UTF-8";
InputStreamReader Bufin;
try {
Bufin = new InputStreamReader (new FileInputStream (file),
encoding);
BufferedReader bufread = new BufferedReader (Bufin);
A line of reading must still have a string,
String READF = null;

try {
while ((READF = Bufread.readline ()) = null) {

System.out.println (READF);
Txae.append (READF);
}
You have to close the stream after reading.
Bufread.close ();
Bufin.close ();
} catch (IOException E1) {
TODO auto-generated Catch block
E1.printstacktrace ();
System.out.println ("read failed 1======");

}
} catch (Unsupportedencodingexception E1) {
TODO auto-generated Catch block
E1.printstacktrace ();
System.out.println ("read failed 2======");
} catch (FileNotFoundException E1) {
TODO auto-generated Catch block
E1.printstacktrace ();
System.out.println ("read failed 3======");

}

TODO auto-generated Catch block

}
});

Write file operations
Saveitem.addactionlistener (new ActionListener () {

@Override
public void actionperformed (ActionEvent e) {
TODO auto-generated Method Stub
if (file = = null) {
Savedial.setvisible (TRUE);
String dir = savedial.getdirectory ();
String fileName = Savedial.getfile ();
File = new file (dir, fileName);

}
The following write operation design output stream operation
try {
OutputStreamWriter BUFW = new OutputStreamWriter (
New FileOutputStream (file));
String writestr = Txae.gettext ();
try {
Bufw.write (WRITESTR);
} catch (IOException E1) {
TODO auto-generated Catch block
E1.printstacktrace ();
}
try {
Bufw.close ();
} catch (IOException E1) {
TODO auto-generated Catch block
E1.printstacktrace ();
}

} catch (FileNotFoundException E1) {
TODO auto-generated Catch block
E1.printstacktrace ();
}

}
});

}

/**
* @param args
*/
public static void Main (string[] args) {
TODO auto-generated Method Stub
Mynotepad NotePad = new Mynotepad ();
Notepad.mynotepad ();
}

}

Use AWT to write your fourth graphical interface in Java--a simple Notepad