Question

when I write a float on a file I get a sequence of unknown characters (symbols) but not a float.

DataOutputStream dos = new DataOutputStream( new FileOutputStream(filename,true));
        dos.writeLong((long)data);
        dos.writeChars(" ");
        dos.writeFloat((float) mAcceleration[0]);
        dos.writeChars(" ");
        dos.close();

Created file with long and floats:

 Îîð}  ¾W¿ 

I’ve also tried with a float and I got unknown characters too. What is wrong?

float f=4.3423f;
DataOutputStream dos = new DataOutputStream( new FileOutputStream(file,true));
dos.writeFloat(f);
dos.close();

Answer 1

because you cant read binary, it is writing in binary thats why these are non human-readable characters

DataOutputStream is binary stream