BigInteger, BigDecimal example

<BigInteger>

import java.math.*;

public class Main {
    public static void main(String[] args)  {
        System.out.println("MAX Integer : " + Long.MAX_VALUE);
        System.out.println("MIN Integer : " + Long.MIN_VALUE);

        BigInteger bigVal1 = new BigInteger("100000000000000000000");
        BigInteger bigVal2 = new BigInteger("-99999999999999999999");

        BigInteger addResult = bigVal1.add(bigVal2);
        BigInteger mulResult = bigVal1.multiply(bigVal2);

        System.out.println("ADD : " + addResult);
        System.out.println("MUL : " + mulResult);
    }
}

<result>

MAX Integer : 9223372036854775807
MIN Integer : -9223372036854775808
ADD : 1
MUL : -9999999999999999999900000000000000000000

<BigDecimal>

import java.math.*;

public class Main {
    public static void main(String[] args)  {
        BigDecimal e1 = new BigDecimal(1.6);
        BigDecimal e2 = new BigDecimal(0.1);

        System.out.println("ADD : " + e1.add(e2));
        System.out.println("MUL : " + e1.multiply(e2));
    }
}

<result>

ADD : 1.7000000000000000943689570931383059360086917877197265625
MUL : 0.1600000000000000177635683940025051398161724525855033823303533017413935457540219431393779814243316650390625

<BigDecimal>

import java.math.*;

public class Main {
    public static void main(String[] args)  {
        BigDecimal e1 = new BigDecimal("1.6");
        BigDecimal e2 = new BigDecimal("0.1");


        System.out.println("ADD : " + e1.add(e2));
        System.out.println("MUL : " + e1.multiply(e2));
    }
}

<result>

ADD : 1.7
MUL : 0.16