Why strings are immutable in Java?

Answer 1

https://code.sololearn.com/cRFSi8C88PYG/?ref=app

Answer 2

String is immutable for several reasons, here is a summary:
Security: parameters are typically represented as String in network connections, database connection urls, usernames/passwords etc. If it were mutable, these parameters could be easily changed.
Synchronization and concurrency: making String immutable automatically makes them thread safe thereby solving the synchronization issues.
Caching: when compiler optimizes your String objects, it sees that if two objects have same value (a="test", and b="test") and thus you need only one string object (for both a and b, these two will point to the same object).
Class loading: String is used as arguments for class loading. If mutable, it could result in wrong class being loaded (because mutable objects change their state).

Answer 3

Good answer, Stacy. An additional advantage might be this: immutable strings are better suited as hash map keys.

Answer 4

what are parameters