Читайте и существует Dir Content в Java

import java.io.File;
import java.io.IOException;
public class ListOfFiles {
   public static void main(String args[]) throws IOException {
      //Creating a File object for directory
      File directoryPath = new File("D:\\ExampleDirectory");
      //List of all files and directories
      File filesList[] = directoryPath.listFiles();
      System.out.println("List of files and directories in the specified directory:");
      for(File file : filesList) {
         System.out.println("File name: "+file.getName());
         System.out.println("File path: "+file.getAbsolutePath());
         System.out.println("Size :"+file.getTotalSpace());
         System.out.println(" ");
      }
   }
}
Blue-eyed Bug