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...
publicclassMain{publicstaticvoidmain(String[]args){doublenumber=3.141592653589793238;doubleroundedNumber=DecimalUtils.roundToFourDecimalPlaces(number);System.out.println(roundedNumber);// 输出结果为3.1416}} 1. 2. 3. 4. 5. 6. 7. 以上代码首先定义了一个双精度浮点数number,并赋值为π的近似值。然后调...
Another way of rounding numbers is to use theMath.Round()Method. In this case, we can controlnnumber of decimal places by multiplying and dividing by10^n: public static double roundAvoid(double value, int places) { double scale = Math.pow(10, places); return Math.round(value * scale) ...
import java.math.BigDecimal; import java.math.RoundingMode; public class RoundToDecimalPlaces { public static void main(String[] args) { double number = 3.65; BigDecimal bd = new BigDecimal(Double.toString(number)); bd = bd.setScale(2, RoundingMode.HALF_UP); System.out.println("四舍五入到...
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)/...
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 (...
ROUND (number [,decimals ]) //四舍五入,decimals为小数位数] 注:返回类型并非均为整数,如: (1)默认变为整形值 select round(1.23); //打印输出1 select round(1.56); //打印输出2 (2)可以设定小数位数,返回浮点型数据 select round(1.567,2); //打印输出1.57 ...
Two types of operations are provided for manipulating the scale of a BigDecimal: scaling/rounding operations and decimal point motion operations. Scaling/rounding operations (setScale and round) return a BigDecimal whose value is approximately (or exactly) equal to that of the operand, but whose sc...
/** * @param scale 精确到小数点以后几位 (Accurate to a few decimal places) */ fun formatFileSize(size: Long, scale: Int, withUnit: Boolean = false): String { val divisor = 1024L //ROUND_DOWN 1023 -> 1023B ; ROUND_HALF_UP 1023 -> 1KB val kiloByte: BigDecimal = formatSizeBy...
scale 1f Every coordinate will be multiplied with this, to scale the SVG. roundcoords 1f rounding coordinates to a given decimal place. 1f means rounded to 1 decimal place like 7.3 ; 3f means rounded to 3 places, like 7.356 viewbox 0f Enable or disable SVG viewBox. 1f is on, 0f is...