Yes, contains is case sensitive . You can use java.17 Eyl 2008
Read moreHow do you check if a string is a part of another string in Java?
You can use contains(), indexOf() and lastIndexOf() method to check if one String contains another String in Java or not. If a String contains another String then it’s known as a substring. The indexOf() method accepts a String and returns the starting position of the string if it exists, otherwise, it will return -1.
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