Base64
public
class
Base64
extends Object
java.lang.Object | |
↳ | java.util.Base64 |
This class consists exclusively of static methods for obtaining encoders and decoders for the Base64 encoding scheme. The implementation of this class supports the following types of Base64 as specified in RFC 4648 and RFC 2045.
- Basic
Uses "The Base64 Alphabet" as specified in Table 1 of RFC 4648 and RFC 2045 for encoding and decoding operation. The encoder does not add any line feed (line separator) character. The decoder rejects data that contains characters outside the base64 alphabet.
- URL and Filename safe
Uses the "URL and Filename safe Base64 Alphabet" as specified in Table 2 of RFC 4648 for encoding and decoding. The encoder does not add any line feed (line separator) character. The decoder rejects data that contains characters outside the base64 alphabet.
- MIME
Uses "The Base64 Alphabet" as specified in Table 1 of RFC 2045 for encoding and decoding operation. The encoded output must be represented in lines of no more than 76 characters each and uses a carriage return
'\r'
followed immediately by a linefeed'\n'
as the line separator. No line separator is added to the end of the encoded output. All line separators or other characters not found in the base64 alphabet table are ignored in decoding operation.
Unless otherwise noted, passing a null
argument to a
method of this class will cause a NullPointerException
to be thrown.
Summary
Nested classes | |
---|---|
class |
Base64.Decoder
This class implements a decoder for decoding byte data using the Base64 encoding scheme as specified in RFC 4648 and RFC 2045. |
class |
Base64.Encoder
This class implements an encoder for encoding byte data using the Base64 encoding scheme as specified in RFC 4648 and RFC 2045. |
Public methods | |
---|---|
static
Base64.Decoder
|
getDecoder()
Returns a |
static
Base64.Encoder
|
getEncoder()
Returns a |
static
Base64.Decoder
|
getMimeDecoder()
Returns a |
static
Base64.Encoder
|
getMimeEncoder()
Returns a |
static
Base64.Encoder
|
getMimeEncoder(int lineLength, byte[] lineSeparator)
Returns a |
static
Base64.Decoder
|
getUrlDecoder()
Returns a |
static
Base64.Encoder
|
getUrlEncoder()
Returns a |
Inherited methods | |
---|---|
Public methods
getDecoder
public static Base64.Decoder getDecoder ()
Returns a Decoder
that decodes using the
Basic type base64 encoding scheme.
Returns | |
---|---|
Base64.Decoder |
A Base64 decoder. |
getEncoder
public static Base64.Encoder getEncoder ()
Returns a Encoder
that encodes using the
Basic type base64 encoding scheme.
Returns | |
---|---|
Base64.Encoder |
A Base64 encoder. |
getMimeDecoder
public static Base64.Decoder getMimeDecoder ()
Returns a Decoder
that decodes using the
MIME type base64 decoding scheme.
Returns | |
---|---|
Base64.Decoder |
A Base64 decoder. |
getMimeEncoder
public static Base64.Encoder getMimeEncoder ()
Returns a Encoder
that encodes using the
MIME type base64 encoding scheme.
Returns | |
---|---|
Base64.Encoder |
A Base64 encoder. |
getMimeEncoder
public static Base64.Encoder getMimeEncoder (int lineLength, byte[] lineSeparator)
Returns a Encoder
that encodes using the
MIME type base64 encoding scheme
with specified line length and line separators.
Parameters | |
---|---|
lineLength |
int : the length of each output line (rounded down to nearest multiple
of 4). If the rounded down line length is not a positive value,
the output will not be separated in lines |
lineSeparator |
byte : the line separator for each output line |
Returns | |
---|---|
Base64.Encoder |
A Base64 encoder. |
Throws | |
---|---|
IllegalArgumentException |
if lineSeparator includes any
character of "The Base64 Alphabet" as specified in Table 1 of
RFC 2045. |
getUrlDecoder
public static Base64.Decoder getUrlDecoder ()
Returns a Decoder
that decodes using the
URL and Filename safe type base64
encoding scheme.
Returns | |
---|---|
Base64.Decoder |
A Base64 decoder. |
getUrlEncoder
public static Base64.Encoder getUrlEncoder ()
Returns a Encoder
that encodes using the
URL and Filename safe type base64
encoding scheme.
Returns | |
---|---|
Base64.Encoder |
A Base64 encoder. |
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Last updated 2023-02-08 UTC.