There are multiple ways to round a double or float value into 2 decimal places in Java. You can use one of the following methods: The DecimalFormat class The BigDecimal class The String.format() method The Math.
java中的Math.round(double a)函数 Math.round()方法是先将参数加上0.5然后去取它的Math.floor()值,Math.floor(a)是求不大于a的最大整数,可以用楼层来理解。 如果你在2.5层楼,其实是在2层楼,如果是在-7.5层楼,即地下7.5层,你应该是在地下八层楼。(向小的取整)。 所以round(-8.5)=floor(-8.0)=-8,...
In the following code shows how to use StrictMath.round(double a) method.// w w w . jav a2s.c o m public class Main { public static void main(String[] args) { double d1 = 12.34 , d2 = 56.78; System.out.println("closest long value to " + d1 + " = " + StrictMath.round...
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: double PI = 3.1415; However, weshould never use either ...
我有一个 Double 变量,即 0.0449999 我想将其四舍五入到小数点后 1 位 0.1 。 我正在使用 Kotlin,但 Java 解决方案也很有帮助。 val number:Double = 0.0449999 我尝试使用这两种解决方案获得小数点后 1 位: v...
Description The following code shows how to round, ceil, floor a value. Example //fromwww.java2s.compublicclassMain {publicstaticvoidmain(String[] args) {doublex = 2.4;doubley = 9.5;doublez = -1.3; System.out.println("round(x) = "+ Math.round(x)); System.out.println("round(y) =...
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)/...
Use the round() Function for double to int Rounding in C++ Use the lround() Function for double to int Rounding in C++ Use the trunc() Function for double to int Rounding in C++ Conclusion This article will explain several methods of how to round a double to an integer in C++....
五后非零就进一,五后皆零看奇偶,五前为偶应舍去,五前为奇要进一 * Math.Round(3.45, 1) 3.4 * Math.Round(3.35, 1) 3.4 * Math.Round(3.45222, 1) 3.5 * * @param d ex:89.7546897546897500 * @param i * @return */ public static Double getCShareMathRound(Double d, int i) { String dd...
voidsetRoundRect(double x, double y, double w, double h, double arcw, double arch) 将此RoundRectangle2D的位置,大小和角半径 RoundRectangle2D为指定的 double值。 voidsetRoundRect(RoundRectangle2D rr) 将此RoundRectangle2D设置为与指定的 RoundRectangle2D相同。 声明方法的类 java.awt.geom...