publicclassMain{publicstaticvoidmain(String[]args){MyClassmyObject=newMyClass();myObject.amount=10.12345;TwoDecimalPlacesProcessor.process(myObject);System.out.println(myObject.amount);// 输出: 10.12System.out.println(myObject.calculateAmount());// 输出: 10.12}} 1. 2. 3. 4. 5. 6. 7. 8...
我们可以使用正则表达式来检验一个数字是否是两位小数。 publicbooleancheckTwoDecimalPlaces(doublenum){Stringpattern="\\d+\\.\\d{2}";returnString.valueOf(num).matches(pattern);} 1. 2. 3. 4. 在上面的代码中,我们定义了一个正则表达式模式\\d+\\.\\d{2},它匹配的模式是数字、小数点、两位数字。
Admin Mar 10, 2024 Java-examples Java-examples #BigDecimal setScale method #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. ...
Return to Answer 2 added 112 characters in body Source Link Full edited Apr 25, 2014 at 10:47 Jakub H edited Apr 25, 2014 at 10:47 Jakub H 2.2k 10 16 Inline Side-by-side Side-by-side Markdown You can use DecimalFormat to achieve that. First initialize it like that: ...
DecimalFormat df = new DecimalFormat(); df.setMaximumFractionDigits(2); System.out.println(df.format(decimalNumber));
I'm trying to round a double to the nearest two decimal places however, it is just rounding to the nearest full number. For example, 19634.0 instead of 19634.95. This is the current code I use for the rounding double area = Math.round(Math.PI*Radius()*Radius()*100)/100; I can'...
The result should be rounded to 2 decimal places If and only if it is not an integer. Sample Input 4 + 1 2 - 1 2 * 1 2 / 1 2 Sample Output 3 -1 2 0.50 import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc =new Scanner(...
System.out.printf("Printing simple integer: x = %d\n", x);// this will print it upto 2 decimal placesSystem.out.printf("Formatted with precision: PI = %.2f\n", Math.PI);floatn =5.2f;// automatically appends zero to the rightmost part// of decimalSystem.out.printf("Formatted to ...
BigDecimal方法会根据数字的具体精度位数,来判断是否需要使用科学计数法。 验证代码 publicstaticvoidmain(String[] args){BigDecimaldecimal=newBigDecimal("0.00000000000009");DecimalFormatdecimalFormatNumberOfDecimalPlaces2=(DecimalFormat) NumberFormat.getNumberInstance(Locale.CHINA); ...
For each case, print the operation result. The result should be rounded to 2 decimal places If and only if it is not an integer. Sample Input 4 + 1 2 - 1 2 * 1 2 / 1 2 Sample Output 3 -1 2 0.50 import java.util.Scanner; ...