binary - Read from byte array to console (or file) Java -

so have 2 files, binary file have read byte array, , text file have read arraylist of strings. lets assume arraylist has values "char", "int", "double" , serves schema reading binary file.

that means first 2 bytes in byte array want interpret char, next 4 int, , next 8 double, , repeat until file over.

i've implemented reading in data, can't figure out way interpret binary data according schema file. there way this?

ie (psuedocode) using printstream out = new printstream (new outputstream(bytearray)) out.writechar() out.writeint() out.writedouble()

where stream works through bytearray me? (as opposed me saying out.writechar(bytearray[2])?

i have figurd out logic of mapping schema proper action, having trouble converting data. thoughts?

i want write information either console (or file).

think object-oriented! have create class each desired data type, capable of parsing data in input stream.

steps (without caring exceptions):

1) create interface these classes:

interface dataparser {     void parse(datainputstream in, printstream out); } 

2) create class each data type implementing interface. example:

class intparser implements dataparser {     public void parse(datainputstream in, printstream out) {         int value = in.readint();         out.print(value);     } } 

3) use hashmap registering known parsers string id:

map<string, dataparser> parsers = new hashmap<>(); parsers.put("int", new intparser()); 

4) can use this:

datainputstream in = ... ; printstream out = ... ; ... while(hasdata()) {     string type = getnexttype();     dataparser parser = parsers.get(type);     parser.parse(in, out); } // close streams , work on output here 

the method hasdata should determine, whether there still data in input stream. method getnexttype should return next type string arraylist.