1. 使用 Math.round() 方法 java public class RoundExample { public static double roundToTwoDecimalPlaces(double number) { return Math.round(number * 100.0) / 100.0; } public static void main(String[] args) { double number = 3.14159; System.out.println("四舍五入后保留两位小数的结果: " ...
在roundToTwoDecimalPlaces方法中,我们使用了Math.round方法将number乘以100后进行四舍五入,并将结果除以100.0得到保留两位小数四舍五入后的结果。 然后,我们在main方法中定义了一个double类型的变量number,并赋值为3.14159。 最后,我们通过调用roundToTwoDecimalPlaces(number)方法将number保留两位小数四舍五入,并通过Syst...
One way to multiply numbers and round the result to two decimal places is by using theBigDecimalclass provided by Java. TheBigDecimalclass allows precise decimal arithmetic and provides methods to round the result to a specified number of decimal places. Here’s an example code snippet that demon...
TheBigDecimal.setScale()method takes two arguments. The first isscalei.e. number of places to round off. The second is the rounding mode. Different rounding modes can give different results so test them out before finalizing. Thejava.math.RoundingMode.HALF_EVENis the recommended mode in most ...
在Java项目开发中,保留两位小数的方法有以下几种:1、使用String.format,2、使用DecimalFormat,3、使用BigDecimal,4、使用Math.round。下面将详细介绍这些方法的实现和使用场景。 一、使用String.format String.format是Java中一个非常方便的方法,用于格式化字符串。我们可以使用它来保留小数点后的位数。
In this short tutorial, we’ll learn how to round a number tondecimal places in Java. 2. Decimal Numbers in Java Java provides two primitive types that we can use for storing decimal numbers:floatanddouble.Doubleis the default type:
// round to 2 decimal places using HALF_EVEN return total.setScale(2<, RoundingMode.HALF_EVEN); } Now, let’s write a unit test for this method: @Test public void givenPurchaseTxn_whenCalculatingTotalAmount_thenExpectedResult() {
Similarly,Math.round(4.4)rounds 4.4 to the nearest integer, which is 4. doublenumber=4.4;longrounded=Math.round(number);//4 We useMath.round()in the following example user cases: In financial applications, we can round monetary amounts to two decimal places. ...
• Rounding BigDecimal to *always* have two decimal places • BigDecimal to string • How to multiply a BigDecimal by an integer in Java • How to round 0.745 to 0.75 using BigDecimal.ROUND_HALF_UP? • Convert double to BigDecimal and set BigDecimal Precision Examples related...
doublenumber=3.14159;doublerounded=BigDecimalUtils.roundToTwoDecimalPlaces(number);System.out.println(rounded);// 输出:3.14 1. 2. 3. 序列图 下面是使用序列图表示保留两位小数的过程: ProgramUserProgramUser输入一个浮点数调用保留两位小数的方法