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...
最后,我们来展示如何在代码中使用我们定义的注解KeepTwoDecimalPlaces来实现不需要四舍五入的取两位小数。 AI检测代码解析 publicclassTest{@KeepTwoDecimalPlacesprivatedoublevalue=3.456;publicstaticvoidmain(String[]args){Testtest=newTest();doubleresult=DecimalUtil.formatDecimal(test.value);System.out.println(resu...
} 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); decimalFormatNumberOfDecimalPlaces2....
lotus 使用String.format () 方法,它可以按照指定的格式化字符串来输出数值,比如 “%.1f” 表示保留一位小数。例如: doublenum=3.14159;Stringresult=String.format ("%.1f", num);// result = "3.1" 复制 使用DecimalFormat 类,它可以按照指定的模式来格式化数值,比如 “#.#” 表示保留一位小数。例如: doub...
To rounddoubles tondecimal places, we can write ahelper method: private static double round(double value, int places) { if (places < 0) throw new IllegalArgumentException(); BigDecimal bd = new BigDecimal(Double.toString(value)); bd = bd.setScale(places, RoundingMode.HALF_UP); ...
int decimalPlaces = 2; BigDecimal bd = new BigDecimal(number); bd = bd.setScale(decimalPlaces,...
We specify a new pattern withapplyPattern. This pattern adds zeros to decimal places, if they are empty. Grouping digits The,format character is used for grouping of digits. Main.java import java.text.DecimalFormat; void main() { double n = 2_125_405.30; ...
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 [java] view plain copy import java.util.Scanner; public class Main { public static void main(String[] args) { 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 ...
importjava.math.BigDecimal;importjava.math.RoundingMode;publicclassBigDecimalOperationsExtendedWithDecimalPlacesExample{publicstaticvoidmain(String[]args){BigDecimal num1=newBigDecimal("10.5");BigDecimal num2=newBigDecimal("5.3");// 加法 BigDecimal sum = num1.add(num2); // 使用 setScale 方法将加法结果...