Web Reference: A string buffer is like a String, but can be modified. At any point in time it contains some particular sequence of characters, but the length and content of the sequence can be changed through certain method calls. Mar 2, 2026 · StringBuffer is a mutable, growable sequence of characters. Unlike String, which is immutable (every change creates a new object), StringBuffer lets you modify content in place with operations like append, insert, delete, and replace. Dec 4, 2025 · StringBuffer class in Java represents a sequence of characters that can be modified, which means we can change the content of the StringBuffer without creating a new object every time.
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