public static void main(String[] args) { double number = 123.456789; double roundedNumber = roundToTwoDecimalPlaces(number); System.out.println(roundedNumber); // 输出:123.46 } public static double roundToTwoDecimalPlaces(double value) { return Math.round(value * 100.0) / 100.0; } } “` ...
publicclassMathRoundExample{publicstaticdoubleroundToTwoDecimalPlaces(doublenumber){returnMath.round(number*100)/100.0;}publicstaticvoidmain(String[]args){doublenumber=3.14159;System.out.println("保留两位小数四舍五入后的结果:"+roundToTwoDecimalPlaces(number));}} 1. 2. 3. 4. 5. 6. 7. 8. 9....
步骤1: 定义两个Double类型的变量 首先,我们需要定义两个Double类型的变量,用于存储将要进行除法运算的数值。 doublenum1=10.0;doublenum2=3.0; 1. 2. 步骤2: 进行除法运算 接下来,我们使用/运算符对这两个数进行除法运算,并将结果存储在一个名为result的变量中。 doubleresult=num1/num2; 1. 步骤3: 四舍...
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)/...
读一个浮点数:double t = sc.nextDouble(); 相当于 scanf(“%lf”, &t); 或 cin >> t; 读一整行: String s = sc.nextLine(); 相当于 gets(s); 或 cin.getline(…); 判断是否有下一个输入可以用sc.hasNext()或sc.hasNextInt()或sc.hasNextDouble()或sc.hasNextLine() ...
Rounding bigdecimal to 2 decimal places Check BigDecimal contains Zero or not Convert BigInteger to/from ByteArray #How to Convert BigDecimal to Double in Java TheBigDecimalclass in Java provides a method named doubleValue for convertingBigDecimalto adoublevalue. Depending on the magnitude of the Big...
读一个浮点数:double t = sc.nextDouble(); 相当于 scanf("%lf", &t); 或 cin >> t; 读一整行: String s = sc.nextLine(); 相当于 gets(s); 或 cin.getline(...); 判断是否有下一个输入可以用sc.hasNext()或sc.hasNextInt()或sc.hasNextDouble()或sc.hasNextLine() ...
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; ...
Convert BigDecimal to double Top 10 BigInteger Examples Check BigDecimal contains Zero or not Convert BigInteger to/from ByteArray #BigDecimal setScale method This method is used to return a BigDecimal object with a given scale and rounding mode. ...
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: doublenum=3.14159;DecimalFormatdf=newDecimalFormat("#.#");Stringresult=df.format (num);// result = "3.1" ...