// Import the java.io package to make the File class
// available to you without having to type the package
// name in front of the class name each time.
import java.io.*;

public class TestFileClass
 {
    public static void main(String[] args)
     {
       // Creates a reference to a file object.
       File aFile = new File("data.txt");
       // Creates a file object to use as
       // a directory name
       File aDir = new File("mydirectory");
       
       // Checks if the file exists and that
       // it is a file. If so the name and path
       // are printed to the screen.
       if(aFile.exists() && aFile.isFile())
         System.out.println(aFile.getName() + 
                       " exists and is located at "
                         + aFile.getAbsolutePath());
           else
             System.out.println(aFile + "Does not exist.");
        if(aFile.canWrite())
          System.out.println(aFile + " can be written to."); 
        // Sets the file to read only.
        aFile.setReadOnly();
          System.out.println(aFile + "is now read only.");    
       // Creates a directory, giving it the
       // object name. The if statement tests
       // if the directory is successfully
       // created.
       aDir.mkdir();
        if (aDir.isDirectory())
          System.out.println(aDir.getName() + " is a directory.");
          else
          System.out.println("Directory was not created.");
        
     }
 }