String formatting with variable number of arguments in java

Question

Consider a string.

String Str = "Entered number = %d and string = %s"

Let us say I have a list of objects

List<Objects> args = new ArrayList<Objects>();
args.add(1);
args.add("abcd");

Is there any way in which I can substitute these args into Str , so that i get a string like "Entered number = 1 and string = abcd " ?

By generalizing this I was planning to dump all the questions and arguments in a file (like json) and execute them at run time. Please do let me know if there are better ways to do this.

Answer 1

Try:

String formatted = String.format(str, args.toArray());

This gives:

Entered number = 1 and string = abcd