java file input with rewind()/reset() capability

Question

I need to write a function that takes in some kind of input stream thing (e.g. an InputStream or a FileChannel) in order to read a large file in two passes: once to precompu

Answer 1

RandomAccessFile is what you want:

• fseek() is translated to RandomAccessFile#seek
• ftell() is translated to RandomAccessFile#getFilePointer
• rewind() is seek(0)