首先,我们定义了一个静态方法roundToTwoDecimalPlaces,该方法接受一个double类型的参数number,并返回保留两位小数四舍五入后的结果。 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doubl...
public static void main(String[] args) { double number = 123.456789; double roundedNumber = roundToTwoDecimalPlaces(number); System.out.println(roundedNumber); // 输出:123.46 } public static double roundToTwoDecimalPlaces(double value) { return Math.round(value * 100.0) / 100.0; } } “` ...
上面的代码定义了一个DecimalUtils类,其中的roundToTwoDecimalPlaces()方法接受一个double类型的参数number,并返回保留两位小数后的结果。在方法内部,我们创建了一个DecimalFormat对象,并传入字符串"#.00"作为格式化模式。然后,我们使用format()方法将参数number格式化为两位小数的字符串,并将其转换为double类型返回。 使用...
Learn toround off numeric values (floats and doubles) to 2 decimal places in Java. Note that we can use the given solutions to round off to any number of places according to requirements. Quick Reference doublenumber=4.56789; // 1. Using Math.round()doublerounded=Math.round(number*100.0)/...
Example 1: Round a Number using format public class Decimal { public static void main(String[] args) { double num = 1.34567; System.out.format("%.4f", num); } } Output 1.3457 In the above program, we've used the format() method to print the given floating-point number num to 4 ...
BigDecimal(Double) Translates a double into a BigDecimal which is the exact decimal representation of the double's binary floating-point value. BigDecimal(Int32, MathContext) Translates an int into a BigDecimal, with rounding according to the context settings. BigDecimal(Int32) Translates an int...
使用Math.round () 方法,它可以对数值进行四舍五入,返回一个整数。如果要保留一位小数,我们可以先把数值乘以 10,然后再除以 10.0。例如: doublenum=3.14159;doubleresult=Math.round (num *10) /10.0;// result = 3.1 复制 使用BigDecimal 类,它可以对任意精度的数值进行精确的运算。我们可以使用 setScale (...
I have a form that needs to multiply two fields and then raound the answer to the nearest ten. Below is what I have, can someone please tell me what I am missing function DoubleRound(nDec, nValue) {// Rounding function - round nValue to nDec decimal places// use a double round to...
DoubleExample1RoundArea.java演示浮点类型案例1需求的实现过程 package net.ittimeline.java.core.foundational.syntax.variable.type.primitive; /** * double数据类型案例1: * 需求:定义圆周率并赋值为3.14,现有3个圆的半径分别是1.2,2.5,6,求它们的面积 * * @author tony 18601767221@163.com * @version 2023...
BigDecimal(double val) Translates a double into a BigDecimal which is the exact decimal representation of the double's binary floating-point value. BigDecimal(double val, MathContext mc) Translates a double into a BigDecimal, with rounding according to the context settings. BigDecimal...