How does Objects.equals() and Objects.hash() from java.util.Objects simplify writing correct equals() and hashCode() implementations, particularly regarding null-safety?

Objects.equals(a, b) performs a null-safe equality check (returning true if both are null, false if only one is null, and delegating to a.equals(b) otherwise), avoiding the need to manually null-check each field being compared; Objects.hash(fields...) computes a combined hash code across multiple fields (internally similar to Arrays.hashCode() on an array of the boxed field values), both significantly reducing the boilerplate and null-handling bugs common in hand-written equals()/hashCode() implementations, especially for classes with several nullable fields.

public class Person {
    private final String name;
    private final String email;  // nullable

    @Override
    public boolean equals(Object o) {
        if (!(o instanceof Person p)) return false;
        return Objects.equals(name, p.name) && Objects.equals(email, p.email);  // null-safe
    }

    @Override
    public int hashCode() {
        return Objects.hash(name, email);  // handles null fields automatically
    }
}