LeetCode - Add Binary

Java对二进制的支持还是比较好的，用上BIgInteger连溢出都不用考虑了。

public class Solution {
    public String addBinary(String a, String b) {
		java.math.BigInteger ia = new java.math.BigInteger(a, 2);
		java.math.BigInteger ib = new java.math.BigInteger(b, 2);
		java.math.BigInteger isum = ia.add(ib);
        String ssum = isum.toString(2);
        return ssum;
    }
}