finding a file
I'm trying to locate a general a file on my machine, only knowing its name. Right now I have the code
public static void visitAllDirsAndFiles(File dir) {
if (dir.isDirectory()) {
String[] children = dir.list();
for (int i=0; i<children.length; i++) {
visitAllDirsAndFiles(new File(dir, children));
System.out.println (children);
}
}
And that works perfectly fine for finding out whether the file exists, since it lists everything under the c drive. The problem is, once I change String[] children = dir.list();
to
File [] children = dir.listFiles(); and children to children.getPath();
the program no long compiles. WHY IS this?! I want to find the pathname of the file i'm searching for.
All advice would be appreciated!>
[846 byte] By [
nw59a] at [2007-10-2 9:05:10]
do it like this :
if (dir.isDirectory()) {
String[] children = dir.list();
for (int i=0; i<children.length; i++)
{
if(children.isDirectory())
{
visitAllDirsAndFiles(new File(dir, children));
} else
File f = new File(dir+"/"+children);
String path = f.getAbsolutePath();
System.out.println (children);
}
}>
A more generic (and reusable) solution is to write an abstact class that traverses a directory tree and performs an action (supplied by the implementing class) in each directory. If the implementing class is searching for a file, then it would simply look in the current directory for the specified file name.
If you've got the time, I'd recommend looking as this approach, as you'll learn a lot about various topics (abstract classes, recursion, etc.).
OK Here's a Followup question:
Right now, I want to unzip a file. Assume I've already created the unzipping method:
unzipFile (File file_input,)
When I call the unzip method like this:
File f = new File ("Java Notes.zip");
unzipFile (new File (" " + f.getAbsolutePath());
Nothing happens!
but when I call it like this:
unzipFile (new File ("C:\Documents and Settings\Java Notes.zip"));
it unzips properly!
I assume its because when I get the AbsolutePath, it returns the path with the separator ' / ' instead of ' \ '.
So I'm wondering if there's anyway to convert between the two types of separators. THANKS!
nw59a at 2007-7-16 23:12:09 >
