print spaces with String.format()

Question

how I can rewrite this:

for (int i = 0; i < numberOfSpaces; i++) {
    System.out.print(" ");
}

using String.format()?

PS

I'm pretty sure that this is possible but the javadoc is a bit confusing.

Answer 1

You need to specify the minimum width of the field.

String.format("%" + numberOfSpaces + "s", "");

Why do you want to generate a String of spaces of a certain length.

If you want a column of this length with values then you can do

String.format("%" + numberOfSpaces + "s", "Hello");

Will give you Hello followed by numberOfSpaces-5 at the end. If you want Hello to appear on the right then add a minus sign in before numberOfSpaces.

Answer 2

int numberOfSpaces = 3;
String space = String.format("%"+ numberOfSpaces +"s", " ");