publicclassRoundExample{publicstaticvoidmain(String[]args){doublenumber=123.456789;System.out.println("原始数值: "+number);System.out.println("四舍五入到小数点后保留2位: "+roundToNDecimalPlaces(number,2));System.out.println("四舍五入到小数点后保留4位: "+roundToNDecimalPlaces(number,4));}pub...
publicclassRandomDecimalGenerator{publicstaticvoidmain(String[]args){// 步骤 1: 导入必要的类Randomrandom=newRandom();// 创建随机数生成器的实例// 步骤 3: 生成随机数doublerandomNumber=random.nextDouble()*100;// 生成 0 到 100 之间的随机数doubletwoDecimalNumber=Math.round(randomNumber*100.0)/100.0...
*/publicclassRetainTwoDecimal{doubleretainTwoDecimal=111231.5585;publicvoidm1(){BigDecimalbg=newBigDecimal(retainTwoDecimal);doublef1=bg.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue(); System.out.println(f1); }/** * DecimalFormat转换最简便 */publicvoidm2(){DecimalFormatdf=newDecimalFormat("#....
Java中取两位小数 请参考下面函数: publicstaticString round2DecimalPlaces(doubled){ java.text.DecimalFormat df=newjava.text.DecimalFormat("#0.00");returndf.format(d); } 输出: Ticket price=108.00Ticket price=54.00Ticket price=34.20Ticket price=35.64...
* DecimalFormat is a concrete subclass of NumberFormat that formats decimal numbers.* @param d* @return*/public static String formatDouble4(double d) {DecimalFormat df = new DecimalFormat("#.00");return df.format(d);}/*** 如果只是用于程序中的格式化数值然后输出,那么这个方法还是挺方便的。* ...
#How to Round BigDecimal to the nearest whole or integer value This tutorial is about how to round aBigDecimalvalue to n decimal places in Java. TheBigDecimalclass provides thesetScaleandroundmethods for achieving this. You can also check my previous posts on theBigIntegerclass in Java. ...
double num=3333.445555;// commons-math3double numByM3=Precision.round(num,2);System.out.println("numByM3="+numByM3); String#format 代码语言:javascript 复制 double num=3333.445555;// String#formatString numByStr=String.format("%.2f",num);System.out.println("String.format="+numByStr);...
BigDecimal bigDecimal =newBigDecimal(money).setScale(2, BigDecimal.ROUND_DOWN);System.out.println(bigDecimal.toString()); } 金额转成 “元” 或者 “万元” 展示 private static String parseDecimal(BigDecimalmoney) {if(ObjectUtils.isEmpty(money)) {returnnull; ...
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)/...
add(decimal2); BigDecimal difference = decimal1.subtract(decimal2); BigDecimal product = decimal1.multiply(decimal2); BigDecimal quotient = decimal1.divide(decimal2, BigDecimal.ROUND_HALF_UP); System.out.println("Sum: " + sum); System.out.println("Difference: " + difference); System.out....