importjava.math.BigDecimal;publicclassBigDecimalExample{publicstaticvoidmain(String[]args){doublenumber=123.456789;BigDecimaldecimal=newBigDecimal(number);BigDecimalroundedNumber=decimal.setScale(3,BigDecimal.ROUND_HALF_UP);System.out.println(roundedNumber);}} 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 以...
new DecimalFormat("0.00").format(13.146) //结果:13.15 #: 比实际数字的位数多,不变。 new DecimalFormat("##.##").format(3.14) //结果:3.14 new DecimalFormat("#.###").format(3.14) //结果: 3.14 new DecimalFormat("##.###").format(3.14) //结果:3.14 比实际数字的位数少:整数部分不改动,...
System.out.println(df.format(n)); } 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 ...
new DecimalFormat("##.##").format(3.14) //结果:3.14 new DecimalFormat("#.###").format(3.14) //结果: 3.14 new DecimalFormat("##.###").format(3.14) //结果:3.14 比实际数字的位数少:整数部分不改动,小数部分,四舍五入 new DecimalFormat("#.###").format(13.146) //结果:13.146 new Decim...
}DecimalFormatdf=newDecimalFormat(pattern.toString());returndf.format(decimalValue); }//endregion} 案列: @Testpublicvoidtest2(){// Double类型Doublea=Double.valueOf(123456789.01234);StringaStr=StringUtil.valueToThousandFormat(a,5,true); System.out.println("a= "+ aStr);// String 类型Stringb="...
import java.text.DecimalFormat; public class PercentageCalculator { public static void main(String[] args) { int numerator = 75; int denominator = 100; double decimalPercentage = (double) numerator / denominator; DecimalFormat decimalFormat = new DecimalFormat("0%"); ...
decimalFormat.setDecimalFormatSymbols(symbols); // 格式化数字 String formattedNumberWithCustomDecimalSeparator = decimalFormat.format(number); System.out.println("Formatted number with custom decimal separator: " + formattedNumberWithCustomDecimalSeparator); // 输出 "Formatted number with custom decimal separato...
v 调用DecimalFormat的format实例方法,参数为待格式化的数字,该方法使用DecimalFormat对象的pattern对参数进行格式化。 import java.text.DecimalFormat; public class TestDecimalFormat { public static void main(String[] args) { DecimalFormat df = new DecimalFormat(); ...
import java.text.DecimalFormat; import java.text.NumberFormat; public class Main { public static void main(String[] args) { // 使用NumberFormat类格式化数字 NumberFormat numberFormat = NumberFormat.getInstance(); String formattedNumber = numberFormat.format(12345.67); System.out.println("Formatted number...
import java.text.DecimalFormat; public class PercentageCalculator { public static void main(String[] args) { int numerator = 75; int denominator = 100; double decimalPercentage = (double) numerator / denominator; DecimalFormat decimalFormat = new DecimalFormat("0%"); ...