[英]Java decimalFormat RoundingMode
I need to archive this: (basically num1 * num2 = num3 and num1 and num2 are given) 我需要对此进行存档:(基本上是num1 * num2 = num3并给出了num1和num2 )
1) 10.62 * 4.0 = 42.48
2) 14.89 * 8.5 = 126.56
3) 13.21 * 6.0 = 79.26
4) 16.55 * 7.35 = 121.64
5) 18.62 * 9.0 = 167.58
6) 9.47 * 15.3 = 144.89
7) 6.58 * 3.0 = 19.74
8) 18.32 * 5.4 = 98.93
9) 12.15 * 2.9 = 35.24
10) 3.98 * 4.8 = 19.10
This exercise is to practice formatting/rounding string/number. 本练习是练习格式化/舍入字符串/数字。
So I used: 所以我用了:
DecimalFormat decimalFormat = new DecimalFormat(".00");
System.out.println(decimalFormat.format(num3));
and got everything right but the 9) 12.15 * 2.9 = 35.24
, I got 35.23
instead of 35.24
The default RoundingMode of DecimalFormat is HALF_EVEN, if I use RoundingMode.UP I will get this right 35.24 but the others results will be messed so I am stuck... 并得到正确的结果,但9) 12.15 * 2.9 = 35.24
,我得到的是35.23
而不是35.24
。默认的RoundingMode的DecimalFormat为HALF_EVEN,如果我使用RoundingMode.UP,我会得到正确的35.24,但其他结果将被弄乱,所以我卡住...
What should I use in order to get the expected result? 我应该使用什么才能获得预期的结果?
Using RoundingMode UNNECESSARY
, will solve your problem. 使用RoundingMode UNNECESSARY
可以解决您的问题。 Additionally you can catch exceptions and specify output manually if needed. 此外,您可以捕获异常并根据需要手动指定输出。
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