How can I check if a single character appears in a string?

Question

In Java is there a way to check the condition:

"Does this single character appear at all in string x"

without using a loop?

Answer 1

You can use string.indexOf('a').

If the 'a' is present in string, it returns the index(>=0). If not, it returns -1. So, a non-negative return value means that 'a' is present in the string.