Java BigDecimal 算术运算

BigDecimal bignum1 = new BigDecimal("10"); 

BigDecimal bignum2 = new BigDecimal("5"); 

BigDecimal bignum3 = null; 

加法：add

bignum3 =  bignum1.add(bignum2);      

System.out.println("求和：" + bignum3); 

减法：subtract

bignum3 = bignum1.subtract(bignum2); 

System.out.println("求差：" + bignum3);

乘法：multiply

bignum3 = bignum1.multiply(bignum2); 

System.out.println("乘法积：" + bignum3);

除法：divide

bignum3 = bignum1.divide(bignum2); 

System.out.println("除法结果：" + bignum3);

整数末尾0的问题

bigDecimal.setScale(保留小数位数)