public static void main(String[m.shuozhou.ctsxian.com] args) { double number = 123.456789; System.out.printf("Formatted to two decimal places: %.2f%n", number); } } 运行结果: Formatted to two decimal places: 123.46 说明: %.2f 表示格式化为浮点数并保留两位小数。 方法2:使用 String.forma...
importjava.text.DecimalFormat;publicclassDecimalUtil{publicstaticdoubleformatTwoDecimalPlaces(doublenumber){doublemultipliedNumber=number*100;doubleflooredNumber=Math.floor(multipliedNumber);doublefinalResult=flooredNumber/100;returnfinalResult;}publicstaticvoidmain(String[]args){doublenumber=3.1415926;doubleresult=f...
public static double TwoDecimalPlaces(double number) { BigDecimal b = new BigDecimal(Double.toString(number)); return b.setScale(2,BigDecimal.ROUND_HALF_UP).doubleValue(); } 1. 2. 3. 4. 5. 最后,我还是跟API说的一样,将double转换为String之后在构造BigDecimal函数,这样就应该没错了吧。(由于错...
The program formats a double value in two formats. var df = new DecimalFormat("#.##"); We create a new instance of theDecimalFormat. We pass it a non-localized pattern string. The pattern defines a format for a decimal value with a dot followed by two decimal places. df.applyPattern("...
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...
在Java中,如果你想格式化一个浮点数并保留指定的小数位,你可以使用String.format方法。下面是一个简单的例子,演示如何实现这一功能: public class FormatFloatExample { public static void main(String[] args) { double number = 123.456789; int decimalPlaces = 2; String formattedString = String.format("%....
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: ...
publicstaticdoublewithTwoDecimalPlaces(doublevalue){DecimalFormatdf=newDecimalFormat("#.00");returnnewDouble(df.format(value)); }intvalue=12; assertThat(withTwoDecimalPlaces(value)).isEqualTo(12.00); In this case,we created a new format with a pattern specifying two zeros after the decimal point...
DecimalFormatallows us to explicitly set rounding behavior, giving more control of the output than theString.format()used above. 4. RoundingDoubles WithBigDecimal To rounddoubles tondecimal places, we can write ahelper method: private static double round(double value, int places) { ...