public static void main(String[] args) { double number = 123.456789; int decimalPlaces = 2; String formattedString = String.format("%.2f", number); System.out.println(formattedString); } } 在上述代码中,%.2f是一个格式说明符,其中.后的2表示小数点后要显示的位数。所以"%.2f"将数字number格...
String.Format("{0:#.#}", 0.0); // "" 1. 2. 3. 4. 用空格对齐数字 右对齐:在”,“后不变。其次是数量的空格,例如类型逗号“0,10:0.0”(可以使用String.Format方法,在double.ToString方法不是)。左对齐:在”,“后,用"-" [C#] String.Format("{0,10:0.0}", 123.4567); // " 123.5" Str...
方法3:使用 String.format() 如果你需要将格式化后的字符串存储或进一步处理,可以使用 String.format()。 示例代码: java public class DecimalOutputExample { public static void main(String[] args) { double decimalNumber = 123.456789; String formattedNumber = String.format("Formatted number: %.3f", dec...
public class Main { public static void main(String[] args) { int intNumber = 123; double doubleNumber = 123.456; // 整数格式化 String formattedInt = String.format("%5d", intNumber); System.out.println("Formatted Integer (right aligned, width 5): " + formattedInt); formattedInt = Strin...
importjava.text.DecimalFormat;publicclassMain{publicstaticvoidmain(String[]args){doublenumber=1234567.89;DecimalFormatdecimalFormat=newDecimalFormat("#,###.00");StringformattedNumber=decimalFormat.format(number);System.out.println("Formatted number with thousand separator and decimal places: "+formattedNumber)...
expr2: Required. Must be an INT type value, with valid values ranging from 0 to 340. It determines the number of decimal places to retain. You can also use a format like #,###,###.##, where the actual number of decimal places returned will depend on this parameter's value. Return...
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We’ve worked with examples of using the STR String templates from the Java API. The core Java API also defines another String Template: FMT. You could think of it as using the ability to use the format specifiers with options, such as, %d, %s and others for finer control over how you...
importjava.text.DecimalFormat;publicclassMain{publicstaticvoidmain(String[]args){doublenumber=3.1415926;StringformattedNumberStr=formatDouble(number,2);System.out.println(formattedNumberStr);}publicstaticStringformatDouble(doublenumber,intdecimalPlaces){DecimalFormatdecimalFormat=newDecimalFormat("#."+"0".repeat...