Mentions some pros and cons of immutable vs mutable Strings

Here are some pros and cons of immutable vs mutable Strings in Java:

Immutable Strings

Pros:

Thread-safe: Since immutable objects cannot be changed after creation, they are inherently thread-safe. This makes them ideal for use in concurrent environments.
Caching: The JVM can cache immutable String objects, improving performance by reusing existing objects in memory.
Hashcode caching: The hashcode of an immutable String is calculated once and cached, making hash table lookups more efficient.
Safer to use as Map keys: Immutable objects like Strings can be safely used as keys in hash-based collections like HashMap, as their hashcode will never change.

Cons:

Memory overhead: Immutable objects require more memory, as every modification creates a new object. This can lead to higher memory usage in some cases.
Performance overhead: Creating new objects for every modification can result in performance overhead, especially in tight loops or frequently modified Strings.