File Test

/**
* io/FileTest.java - Show values of some File methods.
* 2002-01-16 (Catania) -- Fred Swartz
*/

import java.io.*;
import java.net.URI;
import java.util.*;

class FileTest {
    public static void main(String[] args) {
        //-- Make sure there is one parameter
        if (args.length != 1) {
            System.err.println("Usage: java FileTest filename");
            System.exit(1);
        }
       
        try {
            File f = new File(args[0]);
            long d;
          
            System.out.println("getName()          = " + f.getName());
            System.out.println("getAbsoluteFile().getName() = " 
                              + f.getAbsoluteFile().getName());
            boolean exists = f.exists();
            System.out.println("exists()           = " + exists);
            if (!exists) {
                System.exit(1);
            }
            System.out.println("canRead()          = " + f.canRead());
            System.out.println("canWrite()         = " + f.canWrite());
            System.out.println("getPath()          = " + f.getPath());
            System.out.println("getAbsolutePath()  = " + f.getAbsolutePath());
            System.out.println("getCanonicalPath() = " + f.getCanonicalPath());
            System.out.println("getAbsoluteFile()  = " + f.getAbsoluteFile());
	// The following is deprecated.
        //  System.out.println("toURL()            = " + f.toURL());
	    URI uri = f.toURI();
            System.out.println("toURI()            = " + uri);
	    System.out.println("convert URI to URL = " + uri.toURL());
            System.out.println("getParent()        = " + f.getParent());
            System.out.println("isAbsolute()       = " + f.isAbsolute());
            boolean isDirectory = f.isDirectory();
            System.out.println("isDirectory()      = " + isDirectory);
            System.out.println("isFile()           = " + f.isFile());
            System.out.println("isHidden()         = " + f.isHidden());
            System.out.println("lastModified()     = " + (d = f.lastModified())
                               + " = " + new Date(d));
            System.out.println("length()           = " + f.length());
            if (isDirectory) {
                String[] subfiles = f.list();
                for (int i=0; i<subfiles.length; i++) {
                    System.out.println("file in this dir   = " + subfiles[i]);
                }
            }
        } catch (IOException iox) {
           System.err.println(iox);
        }
    }
}

Results

C:\ece595_06\day06>javac -Xlint FileTest.java

C:\ece595_06\day06>java FileTest FileTest.java
getName()          = FileTest.java
getAbsoluteFile().getName() = FileTest.java
exists()           = true
canRead()          = true
canWrite()         = true
getPath()          = FileTest.java
getAbsolutePath()  = C:\ece595_06\day06\FileTest.java
getCanonicalPath() = C:\ece595_06\day06\FileTest.java
getAbsoluteFile()  = C:\ece595_06\day06\FileTest.java
toURI()            = file:/C:/ece595_06/day06/FileTest.java
convert URI to URL = file:/C:/ece595_06/day06/FileTest.java
getParent()        = null
isAbsolute()       = false
isDirectory()      = false
isFile()           = true
isHidden()         = false
lastModified()     = 1378576391779 = Sat Sep 07 13:53:11 EDT 2013
length()           = 2592