dir.java

Java程序设计技巧与开发实例附书源代码。

import java.io.*;
import java.util.*;

public class Dir
{
  private static void showDirInfo(File list[])
  {
    Arrays.sort(list, new FileNameSorter());
    for (int i = 0; i < list.length; i++)
    {
      if (list[i].isDirectory())
      {
        System.out.print("DIRECTORY");
      }
      else
      {
        System.out.print(list[i].length() + " bytes");
      }
      System.out.println("\t" + list[i]);
    }
  }

  public static void main(String args[])
  {
    File path = new File(System.getProperty("user.dir"));
    if (args.length > 0)
    {
      path = new File(args[0]);
    }
    if (path.exists() && path.isDirectory())
    {
      showDirInfo(path.listFiles());
    }
    else
    {
      System.out.println("Path not found or not directory");
    }
  }
}