How to find out a single character appears in String or not in Java

Question

How can we check whether a single character is present in String or not without using Loops?

Answer 1

String str="Hello";
System.out.println(str.indexOf("l"));

This str.indexOf() method is used to check the index of the passed character/letter. If the letter/character is present in the string then it will return non-negative value. If the letter/ character is not present in the String, it will return -1.

Answer 2

You can use string.indexOf('s').

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