How to convert efficiently binary string to binary byte array in Java? -

How to convert efficiently binary string to binary byte array in Java? -

as input have binary string string = "100110". output need have binary byte array byte[] b = {1,0,0,1,1,0}. i'm using

for (int i=0; i<a.length; i++) { b[i]= byte.parsebyte(a.substring(i, i+1)); }

but approach slow. can 1 give improve suggestion? give thanks you

you can without making objects substrings, this:

for (int i=0; i<a.length; i++) { b[i]= a.charat(i)=='1' ? (byte)1 : (byte)0; }

the reason approach slower each phone call substring produces new string object, becomes eligible garbage collection parsebyte done it.

java arrays string binary-data