String format query

Question

What does it represents in java?

String.format("%01000d",0)

It prints 0 thousands times. But can anyone help how does it actually works. What does "%01000d" represents?

Answer 1

The first argument is a format string, here you can find the sintax: https://docs.oracle.com/javase/7/docs/api/java/util/Formatter.html#syntax