What is String Buffer and String Builder class?

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Accepted Answer

String Buffer and String Builder are classes in Java used for manipulating strings.

String Buffer and String Builder are mutable classes, meaning they can be modified.
String Buffer is synchronized, making it thread-safe but slower than String Builder.
String Builder is not synchronized, making it faster but not thread-safe.
Both classes have methods for appending, inserting, deleting, and replacing characters in a string.
Example: StringBuilder sb = new StringBuilder("Hello"); sb.append(" World"); System.out.println(sb.toString()); // Output: Hello World

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