tryfile.java

Java Classic Examples是我买的两本书：《JAVA经典实例》和《java入门经典源代码》里边附送光盘里带的源码

import java.io.*;                            // For input & output classes
import java.util.Date;                       // For the Date class

public class TryFile
{
  public static void main(String[] args)
  {
    // Create an object that is a directory
    File myDir = new File("I:/jdk1.2/src/java/io");
    System.out.println(myDir.getAbsolutePath()
                 + (myDir.isDirectory()?" is ":" is not ") + "a directory");
    System.out.println("The parent of " + myDir.getName()
                         + " is " + myDir.getParent());

    // Define a filter for java source files beginning with F
    FilenameFilter select = new FileListFilter("F", "java");

    // Get the contents of the directory
    File[] contents = myDir.listFiles(select);

    // List the contents
    if(contents != null)
    {
      System.out.println("\nThe " + contents.length + 
                " matching items in the directory, " + myDir.getName() + ", are:");
      for(int i = 0; i < contents.length; i++)
        System.out.println(contents[i] + " is a " +
                (contents[i].isDirectory() ? "directory":"file") +
                " last modified " + new Date(contents[i].lastModified()));
    }
    else
      System.out.println(myDir.getName() + " is not a directory");

    return;
  }
}