import java.io.File;
public class Main {
public static void main(String[] argv) throws Exception {
File dir = new File("directoryName");
String[] children = dir.list();
if (children == null) {
System.out.println("does not exist or is not a directory");
} else {
for (int i = 0; i < children.length; i++) {
String filename = children[i];
System.out.println(filename);
}
}
}
}