// 運用isDirectory()方法判斷指定文件對象是否是目錄，若是則輸出下一級文件
import java.io.File;
class FileDirList {
  public static void main(String args[]) {
    String dirname = "\\mycode";
    File f1 = new File(dirname);

    if (f1.isDirectory()) {
      System.out.println("Directory of " + dirname);
	  System.out.println("Directory List：" +"\n");
      String s[] = f1.list();

      for (int i=0; i < s.length; i++) {
        File f = new File(dirname + "/" + s[i]);
        if (f.isDirectory()) {
          System.out.println(s[i] + " is a directory");
        } else {
          System.out.println(s[i] + " is a file");
        }
      }
    } else {
      System.out.println(dirname + " is not a directory");
    }
  }
}