Question related to formatting a string from ExamLab. Please somebody explain.

[Sai Kiran Kopparthi]

System.out.printf("45%2$b%3$+04d", 978,654,321,111);

Answer is given as "45true+321"

My doubt is how true came for boolean converter b? Why not false. I have seen these type of boolean formatting many times. Everywhere, the answer is true. Please explain.

[Sagar Rohankar]

This is what JavaDocs says, from java.util.Formatter

Formatter Class wrote:
Conversion | Argument Category |Description

'b', 'B' | general | If the argument arg is null, then the result is "false". If arg is a boolean or Boolean, then the result is the string returned by String.valueOf(). Otherwise, the result is "true".