org.apache.commons.io

Class RandomAccessFiles

java.lang.Object

org.apache.commons.io.RandomAccessFiles

public class RandomAccessFiles
extends Object

Works with RandomAccessFile.

Method Summary

Modifier and Type	Method and Description
static boolean	contentEquals(RandomAccessFile raf1, RandomAccessFile raf2) Tests if two RandomAccessFile contents are equal.
static byte[]	read(RandomAccessFile input, long position, int length) Reads a byte array starting at "position" for "length" bytes.
static RandomAccessFile	reset(RandomAccessFile raf) Resets the given file to position 0.

Methods inherited from class java.lang.Object

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

Method Detail

contentEquals

public static boolean contentEquals(RandomAccessFile raf1,
                                    RandomAccessFile raf2)
                             throws IOException

Tests if two RandomAccessFile contents are equal.

Parameters:

raf1 - A RandomAccessFile.

raf2 - Another RandomAccessFile.

Returns:

true if the contents of both RandomAccessFiles are equal, false otherwise.

Throws:

IOException - if an I/O error occurs.

read

public static byte[] read(RandomAccessFile input,
                          long position,
                          int length)
                   throws IOException

Reads a byte array starting at "position" for "length" bytes.

Parameters:

input - The source RandomAccessFile.

position - The offset position, measured in bytes from the beginning of the file, at which to set the file pointer.

length - How many bytes to read.

Returns:

a new byte array.

Throws:

IOException - If the first byte cannot be read for any reason other than end of file, or if the random access file has been closed, or if some other I/O error occurs.

reset

public static RandomAccessFile reset(RandomAccessFile raf)
                              throws IOException

Resets the given file to position 0.

Parameters:

raf - The RandomAccessFile to reset.

Returns:

The given RandomAccessFile.

Throws:

IOException - If pos is less than 0 or if an I/O error occurs.