Java学习源代码检索系统免费版

				//==============================================================
				// Directory.java - Demonstrates the File class
				//
				// Java学习源代码检索系统 Ver 1.0 20031015 免费正式版
				// 版权所有: 中国IT认证实验室(www.ChinaITLab.com)
				// 程序制作: ChinaITLab网校教研中心
				// 主页地址: www.ChinaITLab.com    中国IT认证实验室
				// 论坛地址: bbs.chinaitlab.com  
				// 电子邮件: Java@ChinaITLab.com
				//==============================================================
				
				import java.io.*;
				
				public class Directory {
				
				 // Input a string
				 public static String readLine()
				  throws IOException {
				  BufferedReader br = 
				   new BufferedReader(new InputStreamReader(System.in));
				  return br.readLine();
				 }
				
				 // Prompt for and input a string
				 public static String readLine(String prompt)
				  throws IOException {
				  System.out.print(prompt);
				  return readLine();
				 }
				
				 // Construct File object for directory path
				 public static File getFileForPath(String path)
				  throws IOException {
				  File dir = new File(path);
				  if (!dir.isDirectory())
				   throw new IOException("Not a directory");
				  return dir;
				 }
				
				 // Main program method
				 public static void main(String args[]) {
				  String path;
				  try {
				   // Get pathname from command line or prompt user
				   if (args.length > 0)
				    path = args[0];
				   else
				    path = readLine("Path name? ");
				  // List directory
				   File dir = getFileForPath(path);
				   String[] filenames = dir.list();
				   for (int i = 0; i < filenames.length; i++)
				    System.out.println(filenames[i]);
				  } catch (IOException e) {            // Trap exception
				   System.err.println(e.toString());   // Display error
				  }
				 }
				}