Web Reference: Definition and Usage The contains() method checks whether a string contains a sequence of characters. Returns true if the characters exist and false if not. The class String includes methods for examining individual characters of the sequence, for comparing strings, for searching strings, for extracting substrings, and for creating a copy of a string with all characters translated to uppercase or to lowercase. Jul 11, 2025 · The String.contains() method is used to search for a sequence of characters within a string. In this article, we will learn how to effectively use the string contains functionality in Java.
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