大数相加

import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Scanner;

public class Main {

public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
BigInteger num1 = new BigInteger(sc.nextLine());
System.out.println(num1);
sc = new Scanner(System.in);
BigInteger num2 = new BigInteger(sc.nextLine());
System.out.println(num2);

num1 = num1.add(num2);
System.out.println(num1);
//测试用例
if(num1.equals(new BigInteger("20100122203011233454668012")))
System.out.println("true");
}
}