How to format strings in Java

Question

Primitive question, but how do I format strings like this:

"Step {1} of {2}"

by substituting variables using Java? In C# it's easy.

Answer 1

f you choose not to use String.format, the other option is the + binary operator

String str = "Step " + a + " of " + b;

This is the equivalent of

new StringBuilder("Step ").append(String.valueOf(1)).append(" of ").append(String.valueOf(2));

Whichever you use is your choice. StringBuilder is faster, but the speed difference is marginal. I prefer to use the + operator (which does a StringBuilder.append(String.valueOf(X))) and find it easier to read.