大整数JAVA算法

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import java.math.BigInteger;    import java.util.Scanner;public class  WQ {        public static  void main(String[] args)    {        BigInteger m1,m2,m3,m4,m5;        Scanner a = new  Scanner(System.in);        int t=a.nextInt();        while(t!=0)        {            m1=a.nextBigInteger();            m2=a.nextBigInteger();            m3=a.nextBigInteger();            m4=a.nextBigInteger();             m5=m1.add(m2);             m5=m5.add(m3);             m5= m5.add(m4);              System.out.println(m5);           t--;        }    }   }