Package org.apache.pdfbox.util
Class Hex
java.lang.Object
org.apache.pdfbox.util.Hex
Utility functions for hex encoding.
- Author:
- John Hewson
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Method Summary
Modifier and TypeMethodDescriptionstatic byte[]
decodeBase64
(String base64Value) Decode a base64 String.static byte[]
Decodes a hex String into a byte array.static byte[]
getBytes
(byte b) Returns the bytes corresponding to the ASCII hex encoding of the given byte.static byte[]
getBytes
(byte[] bytes) Returns the bytes corresponding to the ASCII hex encoding of the given bytes.static char[]
getChars
(short num) Returns the characters corresponding to the ASCII hex encoding of the given short.static char[]
getCharsUTF16BE
(String text) Takes the characters in the given string, convert it to bytes in UTF16-BE format and build a char array that corresponds to the ASCII hex encoding of the resulting bytes.static String
getString
(byte b) Returns a hex string of the given byte.static String
getString
(byte[] bytes) Returns a hex string of the given byte array.static void
writeHexByte
(byte b, OutputStream output) Writes the given byte as hex value to the given output stream.static void
writeHexBytes
(byte[] bytes, OutputStream output) Writes the given byte array as hex value to the given output stream.
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Method Details
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getString
Returns a hex string of the given byte. -
getString
Returns a hex string of the given byte array. -
getBytes
public static byte[] getBytes(byte b) Returns the bytes corresponding to the ASCII hex encoding of the given byte. -
getBytes
public static byte[] getBytes(byte[] bytes) Returns the bytes corresponding to the ASCII hex encoding of the given bytes. -
getChars
public static char[] getChars(short num) Returns the characters corresponding to the ASCII hex encoding of the given short. -
getCharsUTF16BE
Takes the characters in the given string, convert it to bytes in UTF16-BE format and build a char array that corresponds to the ASCII hex encoding of the resulting bytes. Example:getCharsUTF16BE("ab") == new char[]{'0','0','6','1','0','0','6','2'}
- Parameters:
text
- The string to convert- Returns:
- The string converted to hex
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writeHexByte
Writes the given byte as hex value to the given output stream.- Parameters:
b
- the byte to be writtenoutput
- the output stream to be written to- Throws:
IOException
- exception if anything went wrong
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writeHexBytes
Writes the given byte array as hex value to the given output stream.- Parameters:
bytes
- the byte array to be writtenoutput
- the output stream to be written to- Throws:
IOException
- exception if anything went wrong
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decodeBase64
Decode a base64 String.- Parameters:
base64Value
- a base64 encoded String.- Returns:
- the decoded String as a byte array.
- Throws:
IllegalArgumentException
- if this isn't a base64 encoded string.
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decodeHex
Decodes a hex String into a byte array.- Parameters:
s
- A String with ASCII hex.- Returns:
- decoded byte array.
- Throws:
IOException
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