What is the Difference Between String StringBuffer and StringBuilder in Java?
🆚 Go to Comparative Table 🆚The main differences between String, StringBuffer, and StringBuilder in Java are:
- Immutability: String is immutable, meaning it cannot be changed once created, whereas both StringBuffer and StringBuilder are mutable, providing methods for string manipulation.
- Thread Safety: StringBuffer is thread-safe and synchronized, meaning its operations are safe for use with multiple threads. StringBuilder, on the other hand, is not thread-safe and is not synchronized, making it faster and suitable for use in single-threaded environments.
- Performance: StringBuilder is generally faster than StringBuffer due to its lack of synchronization, which allows it to avoid the overhead of thread safety.
Here is a summary of their key characteristics:
String | StringBuffer | StringBuilder | |
---|---|---|---|
Immutability | Immutable | Mutable | Mutable |
Thread Safety | Not Thread-Safe | Thread-Safe & Synchronized | Not Thread-Safe & Not Synchronized |
Performance | Slower (due to immutability) | Slower (due to synchronization) | Faster |
In summary, use StringBuilder for string manipulation in single-threaded environments, and use StringBuffer when multiple threads are working on the same string.
On this pageWhat is the Difference Between String StringBuffer and StringBuilder in Java? Comparative Table: String StringBuffer vs StringBuilder in Java
Comparative Table: String StringBuffer vs StringBuilder in Java
Here is a table comparing the differences between String, StringBuffer, and StringBuilder in Java:
Feature | String | StringBuffer | StringBuilder |
---|---|---|---|
Storage | String pool (Heap memory) | Heap memory | Heap memory |
Mutability | Immutable | Mutable | Mutable |
Performance | Slower than StringBuffer while performing concatenation | Faster than String, slower than StringBuilder while performing concatenation | Faster than both String and StringBuffer while performing concatenation |
Usage in threaded environment | Not used in a threaded environment | Used in a multi-threaded environment | Not recommended for multi-threaded environments |
Synchronization | Not synchronized | Synchronized | Not synchronized |
- String: Represents an immutable sequence of characters. When concatenating strings, a new string is generated, leaving the original string intact and creating garbage for garbage collection.
- StringBuffer: A mutable and thread-safe class that allows for efficient string manipulation, particularly in multi-threaded environments. Methods like
append()
,insert()
,delete()
, andsubstring()
are provided for string manipulation. - StringBuilder: Similar to StringBuffer, but not thread-safe and more suitable for single-threaded environments. It provides the same methods for string manipulation as StringBuffer and is faster than both String and StringBuffer while performing concatenation.
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