How to detect the failure of byte[] => String conversion

[Sakagami Hiroki]

Hi,

When I want to convert a byte array to a String object, I can use
String constructor with charset parameter:

String result = new String(bytearray, charset);

Here, if the bytearray contains any illegal sequence of bytes in
charset, they seems to be replaced with `?'. Is it possible to throw
Exception instead of using replacement characters?

Regards,

 

[Timo Stamm]

Hi,

When I want to convert a byte array to a String object, I can use
String constructor with charset parameter:

String result = new String(bytearray, charset);

Here, if the bytearray contains any illegal sequence of bytes in
charset, they seems to be replaced with `?'. Is it possible to throw
Exception instead of using replacement characters?

Not using the String class. The String class uses the Charset and
CharsetDecoder classes and you can do so too:

CharsetDecoder d = Charset.forName("US-ASCII").newDecoder();
try {
CharBuffer r = d.decode(ByteBuffer.wrap(bytearray));
r.toString(); // your encoded String
} catch(CharacterCodingException e) {
// ...
}


Timo

 

[Sakagami Hiroki]

Not using the String class. The String class uses the Charset and
CharsetDecoder classes and you can do so too:

CharsetDecoder d = Charset.forName("US-ASCII").newDecoder();
try {
CharBuffer r = d.decode(ByteBuffer.wrap(bytearray));
r.toString(); // your encoded String
} catch(CharacterCodingException e) {
// ...
}

Works fine. Thanks!