Which Of The Following Classes Directly Implement Set Interface


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    Which Of The Following Classes Directly Implement Set Interface

    In any programming language, there are always certain classes that implement a set of interfaces. These classes are called direct implementations, as they directly provide the functionality that’s defined in the interface. Knowing when to use a direct implementation can save you time and hassle later on. In this blog article, we’ll look at five situations where a direct implementation is the right choice. Can’t wait to see? Keep reading!

    Inheritance 2

    Thejava.util.Set interface defines methods for adding, removing and examining elements of a set. The class java.util.HashSet implements the Set interface and provides a hash-based selection mechanism for locating elements in the set.

    The class java.io.FileSet provides an indirect implementation of the Set interface which allows sets of files to be managed as a unit.

    Interface 3

    interface Set { public void add(Object obj); public boolean contains(Object obj); } interface List extends Set{ public void add(E e); public boolean contains(E e); }

    The List interface implements the Set interface. This means that List canadd and contain objects. The following code shows how to use the list to store an employee’s information:

    List employees = new ArrayList(); employees.add(new Employee()); employees.add(new Employee()); employees.add(new Employee());

    This code creates an instance of the Set interface, which in turn defines two methods – add and contains. The first line adds three Employees to the list and the second line checks to see if any of the Employees exist in the list.

    Overriding Methods in Interface 1

    Interface 1 specifies a set of methods, but the class that implements Set does not implement all of those methods. A subclass can override any method in the interface.

    When you write code that uses an interface, it’s important to remember that not every class that extends that interface will implement all of the interface’s methods. You can override any method in an interface by implementing that method in your subclass.

    Let’s take a look at an example: Suppose you have an interface called Person that declares a set of methods for working with people. The Person Interface defines the following two fields: firstName and lastName.
    The person object has a firstName and lastName field, so we’ll use this as our example implementation of the Person Interface.
    Now let’s suppose we want to add another field to the Person Interface called age . We can create a new subclass called PersonAge which will implement the age method from the Person Interface.
    Here is our code for the PersonAge Subclass: public class PersonAge implementsPerson { // Override methods fromPerson(){ return “I’m a Subclass of ” + this; } // Implement person() {} } Here is what our code would look like when we compile and run it: I’m a Subclass of person I’m a Subclass of person Age

    Overriding Methods in Interface 2

    interface Set { List add(T t); List remove(T t); }

    The class ArrayList directly implements the Set interface. This means that it is possible to use ArrayList as a data structure for storing sets of objects. Furthermore, since ArrayList is an abstract class, it can be extended to create specific implementations of the Set interface, such as TreeSet or LinkedHashSet.


    I hope you have found this article on classes that implement set interface helpful. Classes that implement set are useful in many situations, but they can also be useful when trying to modularize your code or when working with immutable data structures. When looking for a class that implements set, it is important to consider the use cases for which it will be used and make sure that the class meets those needs.

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