Hashcode Method: The hashcode method is another method in Java that returns a unique identifier for an object. It is often used in conjunction with the equals method to efficiently compare objects.
Object Class: The Object class is the root class in Java from which all other classes inherit. It provides basic methods such as equals and hashcode that can be overridden by subclasses.
String Class: The String class in Java represents a sequence of characters. It overrides the equals method to compare the contents of two strings instead of their memory addresses.