Reading and Printing a Directory Hierarchy

       
import java.io.File;
import java.io.IOException;

public class FileUtil {
  public static void main(String[] a)throws IOException{
    showDir(1, new File("d:\\Java_Dev"));
  }
  static void showDir(int indent, File file) throws IOException {
    for (int i = 0; i < indent; i++)
      System.out.print('-');
    System.out.println(file.getName());
    if (file.isDirectory()) {
      File[] files = file.listFiles();
      for (int i = 0; i < files.length; i++)
        showDir(indent + 4, files[i]);
    }
  }
}

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Reading and Printing a Directory Hierarchy : Directory « File Input Output « Java

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