de.vdheide.utils
Class Bytes

java.lang.Object
  de.vdheide.utils.Bytes

public class Bytes

extends java.lang.Object

Takes an array of bytes (e.g. read from an InputStream) and converts it into a number, assuming MSB order.

Constructor Summary

Bytes(byte[] in)
Create a new object from an array of bytes and convert to number.

Bytes(byte[] in, int start, int length)
Create a new object from an array of bytes and convert to a number.

Bytes(long in)
Create a new object from a long value und convert to array of bytes.

Bytes(long in, int len)
Create a new object from a long value und convert to array of bytes.

Method Summary

static long	byteArrayToLong(byte[] in, int start, int length) Convert length bytes from an array of bytes starting at position start to a long value.
byte[]	getBytes()
long	getValue()
static byte[]	longToByteArray(long in, int len) Convert long value to array of bytes.

Methods inherited from class java.lang.Object

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

Constructor Detail

Bytes

public Bytes(byte[] in)

Create a new object from an array of bytes and convert to number. Result can be read by getValue().

Parameters:

in - Array to convert.

Bytes

public Bytes(byte[] in,
             int start,
             int length)

Create a new object from an array of bytes and convert to a number. Result can be read by getValue().

Parameters:

in - Array to convert.

start - First index in in to read

length - Number of bytes to read

Bytes

public Bytes(long in)

Create a new object from a long value und convert to array of bytes. Result can be read with getBytes().

Parameters:

in - Value to convert

Bytes

public Bytes(long in,
             int len)

Create a new object from a long value und convert to array of bytes. Result can be read with getBytes().

Parameters:

in - Value to convert

len - Length of resulting byte array

Method Detail

getValue

public long getValue()

Returns:

long representation of input

getBytes

public byte[] getBytes()

Returns:

bytes representation of input

byteArrayToLong

public static long byteArrayToLong(byte[] in,
                                   int start,
                                   int length)

Convert length bytes from an array of bytes starting at position start to a long value.

Parameters:

in - Array of bytes to convert

start - First index in in to read

length - Number of bytes to read

Returns:

converted value

longToByteArray

public static byte[] longToByteArray(long in,
                                     int len)

Convert long value to array of bytes.

Parameters:

in - Long value to convert

len - Length of resulting byte array. -1 for minimum length needed.

Returns:

Newly created array of bytes with enough elements to hold the input First entry contains the MSB.