Re: I have something bugs
On Tue, 03 Jul 2007 11:12:34 -0700, "alex.korsak@gmail.com"
<alex.korsak@gmail.com> wrote, quoted or indirectly quoted someone who
said :
public class Main {
public static void main(String[] args) {
File f = new File("C:\\Windows");
String[] strings = f.list( new FilenameFilter() { // throw exception
public boolean accept(File arg0, String arg1) {
if (new File(arg0.getAbsolutePath()).isDirectory())
return true;
return false;
}
});
for (String value : strings) {
System.out.println( value );
}
}
}
Let's tidy it up:
public class TestFilters {
public static void main(String[] args) {
File winDir = new File("C:\\Windows");
String[] subDirNames = winDir.list( new FilenameFilter() {
// accept dirs only.
public boolean accept(File dir, String filename) {
{
return new File( dir, filename).isDirectory();
}
});
for (String subDirName: subDirNames)
{
System.out.println( subDirName);
}
}
The main thing I did was give each variable a clear name as to what it
contained. Without that, programs become needlessly confusing.
The other thing I did was get rid of your "absolute" call. You only
need that when you want the precise file names. They are not needed
to determine if a file is a directory.
Further you the file you are testing has two parts the dir and the
filename. You need to create a file handle to test that includes both
parts.
I am impressed you mastered the delicate syntax of the inner anonymous
class. You are no dummy, just one who has not yet learned the
importance of naming.
--
Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com