How to convert a byte array to float?
I want to convert a 4-element byte array which I receive from socket connection to float. I searched on Google and tried several methods but couldn’t help myself.
How is datatype byte passed to serial in Java?
It looks like you are sending the data over some interface. Then of course you need to typecast the binary data back into a float at the receiving end (if you want to do something useful with it) – similar to what is done above when it is passed to Serial.println. That line of code declares an array of datatype byte.
What kind of data is stored in a byte array?
A byte will store an 8-bit unsigned number with a range of 0 to 255, no decimal points. I also suggest you review truncation to understand how computer systems handle mathematic calculations that produce decimal results when the result is being stored in a variable type that doesn’t store decimals.
How to populate a byte array in Java?
You probably want to make use of java.nio.ByteBuffer. It has a lot of handy methods for pulling different types out of a byte array and should also handle most issues of endianness for you (including switching the byte order if necessary). byte [] data = new byte [36]; //… populate byte array…
Can a byte be cast into a float?
You cannot just cast them into a float/int. You have to convert the bytes into an int or float. In my opinion the ByteBuffer approach is better, you can specify where the data is wrapped (from which byte index, here 0) and also the endianness (here BIG_ENDIAN).
Can a byte array be converted to an int?
It also has fancy features for converting your byte array to an int array (via an IntBuffer from the asIntBuffer () method) or float array (via a FloatBuffer from the asFloatBuffer () method) if you know that the input is really all of one type. You cannot just cast them into a float/int. You have to convert the bytes into an int or float.