need an easy way convert a string to file

See more:

Java

hi
i read a file and convert it to string, and then after some en-coding with huffman, i write that string, to another file(compressed file)!
now when i decompress the file i can reach to first string
but when write it to a file its not the first file :|
what should i do?

but i should say that it works for text file correctly but
not for pictures !:|

example :
input file :

input = new FileInputStream( "f:/testpic.bmp" );

out put file:

BitOutputStream fop2 = new BitOutputStream("f:/is.oli");

when i read the output file and reach the first string, then write it to new file
its not the first :|

please help
thanks!