Large number processing -- use case

1 The processing of large integers uses BigInteger

Code example ：

public class BigNumber {
    public static void main(String[] args) {
        BigInteger bigInteger = new BigInteger("123456789123456");
        BigInteger bigInteger2 = new BigInteger("123321");
        BigInteger temp;
//             Add 
        temp = bigInteger.add(bigInteger2);
        System.out.println(bigInteger+" And "+bigInteger2+" And for ："+temp);
//         Subtraction 
        temp = bigInteger.subtract(bigInteger2);
        System.out.println(bigInteger+" And "+bigInteger2+" The difference is ："+temp);
//         Multiplication 
        temp = bigInteger.multiply(bigInteger2);
        System.out.println(bigInteger+" And "+bigInteger2+" The product of is ："+temp);
//         division 
        temp = bigInteger.divide(bigInteger2);
        System.out.println(bigInteger+" And "+bigInteger2+" My business is ："+temp);
    }
}

2 Size number processing use

Code example ：

public class BigDecimalDemo {
    public static void main(String[] args) {
        BigDecimal bd1 = new BigDecimal("15113151315131.15153151652");
        BigDecimal bd2 = new BigDecimal("5");
        BigDecimal temp;
//         Add 
        temp = bd1.add(bd2);
        System.out.println(" And for ："+temp);
//         Subtraction 
        temp = bd1.subtract(bd2);
        System.out.println(" The difference is ："+temp);
//         Multiplication 
        temp = bd1.multiply(bd2);
        System.out.println(" Product as ："+temp);
//         division 
        temp = bd1.divide(bd2);
        System.out.println(" Shang Wei ："+temp);

    }
}