Web Reference: Jun 16, 2025 · Learn how to check if a Java string contains a word or phrase using contains, indexOf, or matches. Covers both case-sensitive and case-insensitive methods. The contains() method checks whether a string contains a sequence of characters. Returns true if the characters exist and false if not. The CharSequence interface is a readable sequence of char values, found in the java.lang package. Apr 2, 2013 · While == may be used to compare references of type String, such an equality test determines whether or not the two operands refer to the same String object. The result is false if the operands are distinct String objects, even if they contain the same sequence of characters (§3.10.5, §3.10.6).
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