BigDecimal类的四则运算

import java.math.BigDecimal;

public class Test {

    public static void main(String[] args) {
        BigDecimal a = new BigDecimal("1");
        BigDecimal b = new BigDecimal("2");
        BigDecimal c = new BigDecimal("3");
        BigDecimal d = new BigDecimal("4");
        //加法操作a+b
        System.out.println(a.add(b));
        //乘法操作b*c
        System.out.println(b.multiply(c));
        //减法操作d-a
        System.out.println(d.subtract(a));
        //除法操作d/b
        System.out.println(d.divide(b));
        //乘方操作d的2次方
        System.out.println(d.pow(2));
    }

}