使用BigInteger，如何传递二进制数的符号以将其作为整数？

Question

I'm trying to convert binary strings to signed decimal numbers. I am trying to figure out a way to do that with 10 bit binary strings.

String i = kb.next();
int p = new BigInteger(i, 2).intValue();

The above code will convert a binary string to a decimal number however you need to enter the sign and a 32-bit string. Is there anyway I could pass a 10-bit string and it return the correct decimal number.

Answer 1

I've checked the code you gave and it's still works. If you still want to pass a 32-bit String, however, you could use this code:

while(i.length()<32){
    i = "0"+i;
}

this code fill the given string with 0s before to make a 32-bit integer.