java printf format double with a string parameter

Question

In Java, I want to scan user for formatString and inputDouble as follows:

Scanner scan = new Scanner(System.in);
System.out.println("Enter formating string and double to format:");
String formatString = scan.next();
Double inputDouble = scan.nextDouble();

But for now, let's say I only have

String formatString = "%.2f";
Double inputDouble = 42.424242;

I would to use the System.out.printf(); to format the inputDouble based on the formatString. Something like:

System.out.printf("Formated double: '%s'", formatString, inputDouble);

so something in form:

System.out.printf("Formated double: 'magicGoesHere'", formatString, inputDouble);

So in this particular case, I would like to see output:

Formated double: 42.42

Is it possible somehow? thanks

Answer 1

Split the call up into parts:

System.out.print("Formated double: '");
System.out.printf(formatString, inputDouble);
System.out.print("'");

Answer 2

System.out.printf("Formated double: '%s'", String.format (formatString, inputDouble));