Is it possible to read/write bits from a file using JAVA?

To read/write binary files, I am using DataInputStream/DataOutputStream, they have this method writeByte()/readByte(), but what I want to do is read/write bits? Is it possible?

I want to use it for a compression algorithm, so when I am compressing I want to write 3 bits(for one number and there are millions of such numbers in a file) and if I write a byte at everytime I need to write 3 bits, I will write loads of redundant data...