Besides the ArrayList class in Java, do you think there are other classes that are implemented with an array. Name those predefined Java classes, if any
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Besides the ArrayList class in Java, do you think there are other classes that are implemented with an array. Name those predefined Java classes, if any.
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- Are there other predefined Java classes that are implemented with an array besides ArrayList class in Java?Using examples of your own, write short notes to explain how ArrayList and LinkedList work in Java. please give me a code example how to do that?This is needed in Java Given an existing ArrayList named friendList, find the first index of a friend named Sasha and store it in a new variable named index.
- How do I add several objects to an ArrayList in JAVA using a loop?Write assignments to the library, cs101, and track variables (which you defined in the previous three exercises) to create the appropriate ArrayList objects. Write them once using diamond notation and once without diamond notation, specifying the full type.How do I create a class called MyArrayList which acts just like Java's ArrayList class? And how do I implement an interface exactly like Java's List interface, and for your class to the two constructors given below? You are given the MyListInterface: abstract class MyListInterface extends java.util.AbstractList { abstract public int size (); abstract public void clear (); abstract public boolean add (final Integer element); abstract public Integer get (final int index); abstract public Integer set (final int index, final Integer element); abstract public Integer remove (final int index); abstract public boolean remove (final Integer element); abstract public String toString(); } How do I create an array of type Integer[] with some initial size and keep track of the number of elements actually in use in the array? When it reach the size limit of the array, it must grow the array by creating a new array and copy elements from old array. Here is a list of the…
- Import the ArrayList and List classes from the java.util package to create a list of phone numbers and also import the HashSet and Set classes from the java.util package to create a set of unique prefixes. Create a class called PhoneNumberPrefix with a main method that will contain the code to find the unique prefixes. Create a List called phoneNumbers and use the add method to add several phone numbers to the list. List<String> phoneNumbers = new ArrayList<>(); phoneNumbers.add("555-555-1234"); phoneNumbers.add("555-555-2345"); phoneNumbers.add("555-555-3456"); phoneNumbers.add("444-444-1234"); phoneNumbers.add("333-333-1234"); Create a Set called prefixes and use a for-each loop to iterate over the phoneNumbers list. For each phone number, we use the substring method to extract the first 7 characters, which represent the prefix, and add it to the prefixes set using the add method. Finally, use the println method to print the prefixes set, which will contain all of…Challenge exercise What are examples of other methods that the Arrays class provides?In java A supermarket wants to reward its best customer of each day, showing the customer’s name on a screen in the supermarket. For that purpose, the store keeps an ArrayList.Create a class customer having id, name, gender, and bill provide appropriate getters/setters and constructors also provide toString method.In the Store class, make an ArrayList of customers, store name, and address implement methods public void addSale(Customer c) that will add customers to the arraylist.public void RemoveCustomer(int id);public void UpdateCustomerRecord(int Id);public displayAll();public String nameOfBestCustomer() to record the sale and return the name of the customer with the largest sale. public ArrayList nameOfBestCustomers(int topN) so that it displays the top customers, that is, the topN customers with the largest sales, where topN is a value that the user of the program supplies. Write a program that prompts following menu and ============================================…
- What are wrapper classes and why are they useful for ArrayLists? Include examples of autoboxing and unboxing. Word count: More than 300 words and less than 700 words.You are familiar with ArrayList and have used it in different capacities. The most prominent feature of ArrayList is that it expands automatically as elements are added to it. It can be traversed using a for loop, for each loop and iterator( which you have implemented in Lab 2).In this lab you are going to implement your own ArrayList and its functionalities.Task 1.1: Create a class Generic ArrayList with attributes.Task 1.2: Implement a constructor for your ArrayList class.Task 1.3: Implement add() method for adding elements to ArrayList. Remember, ArrayList adds elements dynamically. It doesn't depend on user defined size.Task 1.4: Implement remove() method for removing an element from a specific index. Remember, ArrayList stores elements in a consecutive sequence. If an element is removed from middle you have to re-adjust the elements in the correct sequence. Note: Break down your implementation by defining helper methods for different tasks, rather than implementing your logic in a…Given that an ArrayList of Strings named friendList has already been created and names have already been inserted, write the statement necessary to change the name "Tyler", stored at index 8, to "Bud". This is needed in Java