java如何对两个超大数相加

public class Test...{




public static void main(String[] args)...{


String a="123456789123456789";


String b = "123456789123456789" ;






java.math.BigInteger a2 = new java.math.BigInteger(a);


java.math.BigInteger b2 = new java.math.BigInteger(b);




java.math.BigInteger result=a2.add(b2);




System.out.println (result );


}




}