Ich hoffe das ist, was Du gesuchst hast
public int binStringToInt(String binString) throws NumberFormatException
{
int dec = 0;
int binlength = binString.length();
for (int i = 0; i < binlength; i++)
{
int c = Integer.parseInt(binString.substring(binlength -i -1, binlength -i));
if (c == 1)
{
dec += Math.pow(2.0f, (double)i);
}
}
return dec;
}