com.calitha.io
Class FileUtil

java.lang.Object
  com.calitha.io.FileUtil

public final class FileUtil
extends Object

Author:

Robert van Loenhout

Method Summary

static void	append(File file, String text) Appends text to a file.
static void	append(File file, String text, Charset charset) Appends text to a file.
static void	copyURLToFile(URL url, File file) Copies the content of an URL to a file.
static String	fileToString(File file, Charset charset) Reads the content of the file and returns it as a string.
static String	getExtension(File file) Gets the extension part of a file.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

append

public static void append(File file,
                          String text)
                   throws IOException

Appends text to a file.

The text is appended using the UTF-8 character set.

Parameters:

file - file to append

text - text that will be appended to the file

Throws:

IOException - if an I/O error occurs

IllegalArgumentException - if the file or text argument is null

append

public static void append(File file,
                          String text,
                          Charset charset)
                   throws IOException

Appends text to a file.

Parameters:

file - file to append

text - text that will be appended to the file

charset - the character set used to write the text in the file

Throws:

IOException - if an I/O error occurs

IllegalArgumentException - if the file, text or charset argument is null

getExtension

public static String getExtension(File file)

Gets the extension part of a file.

The extension is the part that occurs after the last dot.

Parameters:

file - file

Returns:

extension, or null if there is no dot

Throws:

IllegalArgumentException - if the file argument is null

copyURLToFile

public static void copyURLToFile(URL url,
                                 File file)
                          throws IOException

Copies the content of an URL to a file.

Parameters:

url - requested URL

file - output file

Throws:

IOException - if an I/O error occurs

IllegalArgumentException - if the url or file argument is null

fileToString

public static String fileToString(File file,
                                  Charset charset)
                           throws IOException

Reads the content of the file and returns it as a string.

Parameters:

file - file that will be used as input

charset - charset/encoding of the file so the bytes can be transformed into a string

Returns:

result string

Throws:

IOException - if an I/O error occurs

IllegalArgumentException - if the file or charset argument is null