import org.javatuples.Pair; public class PairDemo { public static void main(String[] args) { Pair<String, Double> studentNameGPAPair1 = Pair.with("Justin", 8.76); Pair<String, Double> studentNameGPAPair2 = Pair.with("Jessica", 8.13); String key1 = studentNameGPAPair1.getValue0(); ...
public class ExponentialDemo { public static void main(String[] args) { double x = 9; double y = 2; System.out.printf("The value of " + "e is %.4f%n", Math.E); System.out.printf("exp(%.3f) " + "is %.3f%n", x, Math.exp(x)); System.out.printf("log(%.3f) is " ...
publicclassJavaExample{publicvoidcalculate(intp,intt,doubler,intn){doubleamount=p * Math.pow(1+ (r / n), n * t);doublecinterest=amount - p; System.out.println("Compound Interest after "+ t +" years: "+cinterest); System.out.println("Amount after "+ t +" years: "+amount); }pu...
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("...
public classJavaDoublePrecision {/* Print Java double to 2 decimals of precision. */public static voidmain(String[] args) {doublebig= 1234.12345;floatsmall= 1234.12345f;System.out.printf("%,.2f :: %,.3f",big,small);/* Example prints:1,234.12 :: 1234.123*/}} ...
The problem isn't with Math.round(); it's with doing arithmetic on the result that is returned from this method! The problem here stems from how most modern computers store floating point numbers (double is a floating-point number). This thread gives a basic explanation of the issues invol...
Use%fto format float and double values with decimal points. Formatting floating number types System.out.printf("The float value is %f %n",10.0f);//Prints 'The float value is 10.000000' Use%.Pfpattern for adding floating-point precision in the formatted string. ...
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() 例1:读入整数 代码...
System.out.printf(format, arguments); System.out.printf(locale, format, arguments); We specify the formatting rules using theformatparameter. Rules start with the%character. Let’s look at a quick example before we dive into the details of the various formatting rules: ...
System.err.printf("Unable to open file '%1$s': %2$s", fileName, exception.getMessage()); // -> "Unable to open file 'food': No such file or directory" 1. 2. 3. 4. 5. 6. 7. 8. 像C的sprintf(3)一样,可以使用静态方法String.format格式化字符串: ...