How to scan a folder in Java?

Question

How can I get list all the files within a folder recursively in Java?

Answer 1

public static void directory(File dir) {
    File[] files = dir.listFiles();
    for (File file : files) {
        System.out.println(file.getAbsolutePath());
        if (file.listFiles() != null)
            directory(file);        
    }
} 

Here dir is Directory to be scanned. e.g. c:\