Best way to read structured binary files with Java

To my knowledge, Java forces you to read a file as bytes rather than being able to block read. If you were serializing Java objects, it’d be a different story.

The other examples shown use the DataInputStream class with a File, but you can also use a shortcut: The RandomAccessFile class:

RandomAccessFile in = new RandomAccessFile("filename", "r");
int version = in.readInt();
byte type = in.readByte();
int beginOfData = in.readInt();
byte[] tempId;
in.read(tempId, 0, 16);
String id = new String(tempId);

Note that you could turn the responce objects into a class, if that would make it easier.