Which class is commonly recommended for string manipulation when performance is not a primary concern?a)StringBufferb)StringManipulatorc)StringBuilderd)String

When considering classes for string manipulation in Java, it's important to choose one that suits the needs of the application, particularly when performance is not the primary concern.

1. Understanding String Classes:

   • String: Immutable and each modification creates a new instance.
   • StringBuffer: Mutable, synchronized for safety in multi-threading but has some overhead.
   • StringBuilder: Mutable and not synchronized, making it faster in single-threaded environments.
   • StringManipulator: This is not a standard Java class; therefore, it's not a relevant option.

2. Performance Considerations:

   • If performance is not a concern, using String for its immutability and simplicity can be effective for smaller, less frequent operations. StringBuffer would also be a good choice for its built-in synchronization, though it may be overly cautious for applications where multi-threading isn't a factor.

Recommendation

Given these points, the most common recommendation, particularly for simplicity and usability without performance being a concern, is:

Final Answer: d) String