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Index › Programming Questions & Help › Programs › (newbie) get binary values
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(newbie) get binary values (Read 611 times)
peter_r
(newbie) get binary values
May 13th, 2007, 10:30pm  

hi there,

i'm a total newbie to proce55ing and struggling with my first sketch...

i want to import bytes from a data file and convert them to binary values (0,1).

the binary values should be stored in an array and be accessible seperately - i want to be able to access every single bit...

my first try:

byte b[] = loadBytes("data.dat");
 for (int i = 0; i < b.length; i++) {
   String a = binary(b[i] & 0xff);
   print(a);
 }

so i get a string of bytes in the text area. i dont know how to split it to single values and store them to an array...

can anybody help me, please...?

tia
peter
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Ira
Re: (newbie) get binary values
Reply #1 - May 18th, 2007, 8:34am  
peter,
I think this does it. The hack was subtracting 48 (ASCII value of '0') when parsing the bits.

Code:

byte[] b = {15, -75, 115, 127};  
String a = "";

for (int i = 0; i < b.length; i++) {  
  a += binary(b[i]); 
}  

byte[] bits = new byte[a.length()];

for (int i = 0; i < bits.length; i++) { 
 // hack to get only nums 0, 1
  bits[i] = byte(a.charAt(i)-48); 
  println("bits["+i+"] = " + (bits[i]));
}
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