Java Programming

Hello
I have to compress a string to a smaller string.
To do this i use Deflater as my compression tools. And it works well. But it return a byte array.
I try to display the byte array into a meaningfull string using new String(byte array) But it did't work.
Then i tried to encode the byte array using Base64 encoding,some thing like--

String comp=new sun.misc.BASE64Encoder().encode(byte array);

Now i found the displayable string. But the problem is it's length is some time more then the Original String that has to be compressed.
So can any one help me to conver that byte array to it's equal sized sting ?

Good byte
Nipo.