Package org.apache.pdfbox.util
Class Hex
- java.lang.Object
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- org.apache.pdfbox.util.Hex
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public final class Hex extends java.lang.Object
Utility functions for hex encoding.- Author:
- John Hewson
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static byte[]
decodeBase64(java.lang.String base64Value)
Decode a base64 String.static byte[]
decodeHex(java.lang.String s)
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(java.lang.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 java.lang.String
getString(byte b)
Returns a hex string of the given byte.static java.lang.String
getString(byte[] bytes)
Returns a hex string of the given byte array.static void
writeHexByte(byte b, java.io.OutputStream output)
Writes the given byte as hex value to the given output stream.static void
writeHexBytes(byte[] bytes, java.io.OutputStream output)
Writes the given byte array as hex value to the given output stream.
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Method Detail
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getString
public static java.lang.String getString(byte b)
Returns a hex string of the given byte.
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getString
public static java.lang.String getString(byte[] bytes)
Returns a hex string of the given byte array.
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getBytes
public static byte[] getBytes(byte b)
Returns the bytes corresponding to the ASCII hex encoding of the given byte.
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getBytes
public static byte[] getBytes(byte[] bytes)
Returns the bytes corresponding to the ASCII hex encoding of the given bytes.
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getChars
public static char[] getChars(short num)
Returns the characters corresponding to the ASCII hex encoding of the given short.
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getCharsUTF16BE
public static char[] getCharsUTF16BE(java.lang.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. 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
public static void writeHexByte(byte b, java.io.OutputStream output) throws java.io.IOException
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:
java.io.IOException
- exception if anything went wrong
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writeHexBytes
public static void writeHexBytes(byte[] bytes, java.io.OutputStream output) throws java.io.IOException
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:
java.io.IOException
- exception if anything went wrong
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decodeBase64
public static byte[] decodeBase64(java.lang.String base64Value)
Decode a base64 String.- Parameters:
base64Value
- a base64 encoded String.- Returns:
- the decoded String as a byte array.
- Throws:
java.lang.IllegalArgumentException
- if this isn't a base64 encoded string.
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decodeHex
public static byte[] decodeHex(java.lang.String s) throws java.io.IOException
Decodes a hex String into a byte array.- Parameters:
s
- A String with ASCII hex.- Returns:
- decoded byte array.
- Throws:
java.io.IOException
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