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import java.io.File;

class Main {
    public static void main(String[] args) {
        File dir = new File("C:");
        String[] children = dir.list();
        if (children == null) {
            System.out.println("The directory does not exist or it is not a directory");
        }
        else {
            for (int i = 0; i < children.length; i++) {
                String filename = children[i];
                System.out.println(filename);
            }
        }
    }
}

build
build.xml
destnfile
detnfile
filename
manifest.mf
nbproject
outfilename
src
srcfile
test