com.firefly.utils.codec

类 HexUtils

java.lang.Object

com.firefly.utils.codec.HexUtils

public abstract class HexUtils
extends Object

构造器概要

构造器

构造器和说明
HexUtils()

方法概要

限定符和类型	方法和说明
static String	biToHex(BigInteger bi) Turn a BigInteger into a hex string.
static byte[]	bitsToBytes(BitSet ba, int size)
static String	bitsToHexString(BitSet ba, int size)
static void	bytesToBits(byte[] b, BitSet ba, int maxSize)
static String	bytesToHex(byte[] bs)
static String	bytesToHex(byte[] bs, int off, int length) Converts a byte array into a string of lower case hex chars.
static void	bytesToHexAppend(byte[] bs, int off, int length, StringBuilder sb)
static int	countBytesForBits(int size)
static void	hexToBits(String s, BitSet ba, int length) Read a hex string of bits and write it into a bitset
static byte[]	hexToBytes(String s)
static void	hexToBytes(String s, byte[] out, int off) Converts a String of hex characters into an array of bytes.
static byte[]	hexToBytes(String s, int off)
static BigInteger	readBigInteger(DataInputStream dis) Read a (reasonably short) BigInteger from a DataInputStream
static void	writeBigInteger(BigInteger integer, DataOutputStream out) Write a (reasonably short) BigInteger to a stream.

从类继承的方法 java.lang.Object

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

构造器详细资料

HexUtils

public HexUtils()

方法详细资料

bytesToHex

public static final String bytesToHex(byte[] bs,
                                      int off,
                                      int length)

Converts a byte array into a string of lower case hex chars.

参数:

bs - A byte array

off - The index of the first byte to read

length - The number of bytes to read.

返回:

the string of hex chars.

bytesToHexAppend

public static final void bytesToHexAppend(byte[] bs,
                                          int off,
                                          int length,
                                          StringBuilder sb)

bytesToHex

public static final String bytesToHex(byte[] bs)

hexToBytes

public static final byte[] hexToBytes(String s)

hexToBytes

public static final byte[] hexToBytes(String s,
                                      int off)

hexToBytes

public static final void hexToBytes(String s,
                                    byte[] out,
                                    int off)
                             throws NumberFormatException,
                                    IndexOutOfBoundsException

Converts a String of hex characters into an array of bytes.

参数:

s - A string of hex characters (upper case or lower) of even length.

out - A byte array of length at least s.length()/2 + off

off - The first byte to write of the array

抛出:

NumberFormatException

IndexOutOfBoundsException

bitsToBytes

public static final byte[] bitsToBytes(BitSet ba,
                                       int size)

bitsToHexString

public static final String bitsToHexString(BitSet ba,
                                           int size)

countBytesForBits

public static int countBytesForBits(int size)

bytesToBits

public static void bytesToBits(byte[] b,
                               BitSet ba,
                               int maxSize)

hexToBits

public static void hexToBits(String s,
                             BitSet ba,
                             int length)

Read a hex string of bits and write it into a bitset

参数:

s - hex string of the stored bits

ba - the bitset to store the bits in

length - the maximum number of bits to store

writeBigInteger

public static void writeBigInteger(BigInteger integer,
                                   DataOutputStream out)
                            throws IOException

Write a (reasonably short) BigInteger to a stream.

参数:

integer - the BigInteger to write

out - the stream to write it to

抛出:

IOException - I/O exception

readBigInteger

public static BigInteger readBigInteger(DataInputStream dis)
                                 throws IOException

Read a (reasonably short) BigInteger from a DataInputStream

参数:

dis - the stream to read from

返回:

a BigInteger

抛出:

IOException - I/O exception

biToHex

public static String biToHex(BigInteger bi)

Turn a BigInteger into a hex string. BigInteger.toString(16) NPEs on Sun JDK 1.4.2_05. The bugs in their Big* are getting seriously irritating...

参数:

bi - a big integer.

返回:

a hex string.