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

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

    // Create an object that is a file
    File myFile = new File(myDir, "File.java");
    System.out.println(myFile + 
                        (myFile.exists()?" does":" does not") + " exist");
    System.out.println("You can" + 
                        (myFile.canRead()?" ":"not ") + "read " + myFile);
    System.out.println("You can" + 
                      (myFile.canWrite()?" ":"not ") + "write " + myFile);
    return;
  }
}