FdTestpublic class FdTest extends Frame
| Fields Summary |
|---|
| TextArea | myTextArea | | Label | myLabel | | Button | loadButton | | Button | saveButton |
| Constructors Summary |
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FdTest()
super ("File Dialog Tester");
Panel p = new Panel ();
p.add (loadButton = new Button ("Load"));
p.add (saveButton = new Button ("Save"));
add ("North", myLabel = new Label ());
add ("South", p);
add ("Center", myTextArea = new TextArea (10, 40));
Menu m = new Menu ("File");
m.add (new MenuItem ("Quit"));
MenuBar mb = new MenuBar();
mb.add (m);
setMenuBar (mb);
pack();
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| Methods Summary |
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| public boolean | action(java.awt.Event e, java.lang.Object o)
if (e.target instanceof MenuItem) {
hide ();
dispose ();
System.exit(0);
return true; // never gets here
} else if (e.target instanceof Button) {
int state;
String msg;
if (e.target == loadButton) {
state = FileDialog.LOAD;
msg = "Load File";
} else { // if (e.target == saveButton)
state = FileDialog.SAVE;
msg = "Save File";
}
FileDialog file = new FileDialog (this, msg, state);
file.setFile ("*.java"); // Set initial filename filter
file.show(); // Blocks
String curFile;
if ((curFile = file.getFile()) != null) {
String filename = file.getDirectory() + curFile;
// curFile ends in .*.* if file does not exist
byte[] data;
setCursor (Frame.WAIT_CURSOR);
if (state == FileDialog.LOAD) {
File f = new File (filename);
try {
FileInputStream fin = new FileInputStream (f);
int filesize = (int)f.length();
data = new byte[filesize];
fin.read (data, 0, filesize+100);
} catch (FileNotFoundException exc) {
String errorString = "File Not Found: " + filename;
data = new byte[errorString.length()];
errorString.getBytes (0, errorString.length(), data, 0);
} catch (IOException exc) {
String errorString = "IOException: " + filename;
data = new byte[errorString.length()];
errorString.getBytes (0, errorString.length(), data, 0);
}
myLabel.setText ("Load: " + filename);
} else {
// Remove trailing ".*.*" if present - signifies file does not exist
if (filename.indexOf (".*.*") != -1) {
filename = filename.substring (0, filename.length()-4);
}
File f = new File (filename);
try {
FileOutputStream fon = new FileOutputStream (f);
String text = myTextArea.getText();
int textsize = text.length();
data = new byte[textsize];
text.getBytes (0, textsize, data, 0);
fon.write (data);
fon.close ();
} catch (IOException exc) {
String errorString = "IOException: " + filename;
data = new byte[errorString.length()];
errorString.getBytes (0, errorString.length(), data, 0);
}
myLabel.setText ("Save: " + filename);
}
// Note - on successful save, text is redisplayed
myTextArea.setText (new String (data, 0));
setCursor (Frame.DEFAULT_CURSOR);
}
return true;
}
return false;
| | public boolean | handleEvent(java.awt.Event e)
if (e.id == Event.WINDOW_DESTROY) {
hide ();
dispose ();
System.exit(0);
return true; // never gets here
}
return super.handleEvent (e);
| | public static void | main(java.lang.String[] args)
FdTest f = new FdTest();
f.show();
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