Question

Print an integer representing the number of data characters that do not change position even after after the data stream is reversed. If no such character is found or the input string is empty then print 0.​

Answer 1

Explanation:

the method String::repeat that does exactly what you asked for:

String str = "abc";

String repeated = str.repeat(3);

repeated.equals("abcabcabc");

Its Javadoc says: