What do you think is the most useful method in the Object class in Java?

equals() and hashCode().

Explanation:

• equals(Object obj): This method is fundamental for determining object equality by value, not by reference, which is critically important for working with collections and data comparison.

• hashCode(): It is used in conjunction with equals() for efficient operation of hash-based collections (e.g., HashMap, HashSet). The contract between them states that if two objects are equal according to equals(), their hash codes must be the same.

Their combined use ensures correct object equality logic and efficient collection operations. Overriding these methods is often necessary in custom classes.