the point is that in java everything is an object, the byte[ ] as well so when you call byte[].toString() as usual you get '[', a letter that defines the type 'B', then comes '@' and then the hash code this is the standard toString() implementation for the array object
I would recommend to implement your own Writable that would handle your byte array (if it's not done yet) 2009/12/28 Todd Lipcon <t...@cloudera.com>: > Furthermore, Text is meant for use when you have a UTF8-encoded string. > Creating a Text object from a byte array that is not proper UTF-8 is likely > to result in some kind of exception or data mangling. You should use > BytesWritable for this purpose > > -Todd > > 2009/12/28 Edward Capriolo <edlinuxg...@gmail.com> > >> Calling bitArray.toString() does not return your data. You can test >> this in a standalong program. >> You need to write the array out bitwise or byte wise. toString() does >> not do what you want. >> >> Edward >> >> 2009/12/28 Gang Luo <lgpub...@yahoo.com.cn>: >> > Hi all, >> > I don't know too much about text coding and there is one thing confusing >> me. I am implementing the bloom filter in mapreduce. The output is a bit >> array (implemented as byte[ ]) and the length is 2 exp 24 (that means, >> 2exp21 bytes). The size of the array should be 2 mb. But when I output it >> like this: output.collect(new Text(bitArray.toString()), null); the output >> file is only 10 bytes. The content of the output file is something like >> this: [...@1c695a6. What does Text do when I generate a new Text object >> using the bitArray (which is byte[ ])? >> > >> > The amazing thing is, when I use Text.getBytes() to convert it back to >> byte[ ], it is exactly the same as before! How does it get the 2 mb >> information by the 10 bytes Text object (the value of which is [...@1c695a6 >> )? >> > >> > Thanks. >> > >> > -Gang >> > >> > >> > ___________________________________________________________ >> > 好玩贺卡等你发，邮箱贺卡全新上线！ >> > http://card.mail.cn.yahoo.com/
