SwingUtilities.invokeAndWait(
new Runnable() {
public void run() {
JFrame parent = new JFrame();
JFileChooser fc = new JFileChooser();
fc.setDialogTitle("Please choose a file to gzip: ");
fc.setApproveButtonMnemonic('g");
while (true) {
int result = fc.showDialog(parent,
"Select a file, then press this button to gzip it");
if (result == JFileChooser.APPROVE_OPTION) {
try {
File f = fc.getSelectedFile();
if (f == null) {
JOptionPane.showMessageDialog(parent,
"Can only gzip files, not directories");
}
else {
InputStream in = new FileInputStream(f);
FileOutputStream fout = new FileOutputStream(f.getAbsolutePath()
+ GZIP_SUFFIX);
OutputStream gzout = new GZIPOutputStream(fout);
for (int c = in.read(); c != -1; c = in.read()) {
gzout.write(c);
}
// These next two should be in a finally block; but the multiple
// nested try-catch blocks just got way too complicated for a
// simple example
in.close();
gzout.close();
}
}
catch (IOException ex) {
ex.printStackTrace();
}
}
else {
System.exit(0);
} // end else
} // end while
} // end run
} // end Runnable
); // end invokeAndWait
