Given the following two methods from the List interface draw the final state of an initial empty ArrayList AS of colours add (i, e): Insert a new element e into AS to have index i; remove(i): Remove from S the element at index i; add (0, blue), add (0, pink), add (2, yellow), remove (1), add (3, red)
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- Given the following two methods from the List interface draw the final state of an initial empty ArrayList AS of colours
add (i, e): Insert a new element e into AS to have index i;
remove(i): Remove from S the element at index i;
add (0, blue), add (0, pink), add (2, yellow), remove (1),
add (3, red)
2.Individuals and organizations build various data structures and
- In your own words, explain ways by which people can specify
(i). data structures and (ii) algorithms, that they build and use.
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Solved in 2 steps
- using arrays or Arraylist in Java language Write the method filterBySize().* * Given an ArrayList of String, return a new list where only * strings of the given length are retained.* * Examples:* filterBySize(["a", "bb", "b", "ccc"], 1) returns ["a", "b"]* filterBySize(["a", "bb", "b", "ccc"], 3) returns ["ccc"]* filterBySize(["a", "bb", "b", "ccc"], 4) returns []* * @param list the list of Strings to process.* @param n the size of words to retain.* @return a new list of words with the indicated size retained.Two sorted lists have been created, one implemented using a linked list (LinkedListLibrary linkedListLibrary) and the other implemented using the built-in ArrayList class (ArrayListLibrary arrayListLibrary). Each list contains 100 books (title, ISBN number, author), sorted in ascending order by ISBN number. Complete main() by inserting a new book into each list using the respective LinkedListLibrary and ArrayListLibrary insertSorted() methods and outputting the number of operations the computer must perform to insert the new book. Each insertSorted() returns the number of operations the computer performs. Ex: If the input is: The Catcher in the Rye 9787543321724 J.D. Salinger the output is: Number of linked list operations: 1 Number of ArrayList operations: 1 import java.util.Scanner;import java.io.FileInputStream;import java.io.IOException; public class Library { public static void fillLibraries(LinkedListLibrary linkedListLibrary, ArrayListLibrary arrayListLibrary) throws…Two sorted lists have been created, one implemented using a linked list (LinkedListLibrary linkedListLibrary) and the other implemented using the built-in ArrayList class (ArrayListLibrary arrayListLibrary). Each list contains 100 books (title, ISBN number, author), sorted in ascending order by ISBN number. Complete main() by inserting a new book into each list using the respective LinkedListLibrary and ArrayListLibrary insertSorted() methods and outputting the number of operations the computer must perform to insert the new book. Each insertSorted() returns the number of operations the computer performs. Ex: If the input is: The Catcher in the Rye 9787543321724 J.D. Salinger the output is: Number of linked list operations: 1 Number of ArrayList operations: 1Errors: Library.java:87: error: class Book is public, should be declared in a file named Book.java public class Book{ ^ Book.java:1: error: duplicate class: Book public class Book{ import java.util.Scanner;import…
- Write a program in java that randomly fills in 0s and 1s into an n-by-n matrix, prints the matrix, and finds the rows and columns with the most 1s. (Hint: Use two ArrayLists to store the row and column indices with the most 1s.)Using the picture, use Java to design and implement the class PascalTriangle that will generate a Pascal Triangle from a given number of rows. Represent each row in a triangle as a list and the entire triangle as a list of these lists, implement the class ArrayList for these lists.Given an ArrayList of Integers, find a subarray with the maximum sum of any potential subarray within the ArrayList. A subarray is any combination of consecutive numbers. The subarray can be of any length n, where the size of n >= 0. import java.util.ArrayList;public class MaxSubArray{public static ArrayList<Integer> solution(ArrayList<Integer> nums){// ↓↓↓↓ your code goes here ↓↓↓↓return new ArrayList<>();}}
- Implement a city database using ordered lists. Each database record contains the name of the city (a string of arbitrary length) and the coordinates of the city expressed as integer x and y coordinates. Your database should allow records to be inserted, deleted by name, and searched by name. Another operation that should be supported is to print all records within a given distance of a specified point/coordinate. The order of cities should be alphabetically by city name. Implement the database using: an array- based list implementation. By using JAVA.Implement a self-organizing list by building a single linked list of nodes and frequently and randomly retrieving data from the list. Show what happens to the list when the count, move to front, and transpose techniques are applied to the same set of frequently retrieved items.Using arrays or ArrayList in java language Write the method named mesh.* * Start with two ArrayLists of String, A and B, each with * its elements in alphabetical order and without any duplicates. * Return a new list containing the first N elements from the two * lists. The result list should be in alphabetical order and without * duplicates. A and B will both have a size which is N or more. * Your solution should make a single pass over A and B, taking * advantage of the fact that they are in alphabetical order, * copying elements directly to the new list.* * Remember, to see if one String is "greater than" or "less than" * another, you need to use the compareTo() method, not the < or > * operators. * * Examples:* mesh(["a","c","z"], ["b","f","z"], 3) returns ["a","b","c"]* mesh(["a","c","z"], ["c","f","z"], 3) returns ["a","c","f"]* mesh(["f","g","z"], ["c","f","g"], 3) returns ["c","f","g"]* * @param a an ArrayList of String in alphabetical order.* @param b an ArrayList of…
- The implementation of a queue in an array, as given in this chapter, uses the variable count to determine whether the queue is empty or full. You can also use the variable count to return the number of elements in the queue. On the other hand, class linkedQueueType does not use such a variable to keep track of the number of elements in the queue. Redefine the class linkedQueueType by adding the variable count to keep track of the number of elements in the queue. Modify the definitions of the functions addQueue and deleteQueue as necessary. Add the function queueCount to return the number of elements in the queue. Also, write a program to test various operations of the class you defined.Suppose we want to extend the PositionalList ADT with a method, indexOf(p), that returns the current index of the element stored at position p. Write this method using only other methods of the PositionalList interface (not details of our LinkedPositionalList implementation). Write the necessary code to test the method. Hint: Count the steps while traversing the list until encountering position p public interface PositionalList<E> extends Iterable<E> { int size(); boolean isEmpty(); Position<E> first(); Position<E> last(); Position<E> before(Position<E> p) throws IllegalArgumentException; Position<E> after(Position<E> p) throws IllegalArgumentException; Position<E> addFirst(E e); Position<E> addLast(E e); Position<E> addBefore(Position<E> p, E e) throws IllegalArgumentException; Position<E> addAfter(Position<E> p, E e) throws IllegalArgumentException; E set(Position<E> p, E e) throws…Java Implement 5 methods given below in MyStringArrayList class // Add a new element, e, at the beginning of this list public void addFront(String e){ } //search for element e, returns true if found, otherwise returns false. public boolean contains(String e){ } //return the element at position i, otherwise returns null public String getElement(int i){ } // remove the element at specified index, returns the element that is being removed. Returns null if specified index is invalid. public String removeElementAt(int i){ } //returns a String representation of this list. public String toString(){ }