Is it true or false: If N is the collection's total number of items, the includes() function of the ArrayCollection class has an O(1) runtime in the worst scenario.
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Is it true or false: If N is the collection's total number of items, the includes() function of the ArrayCollection class has an O(1) runtime in the worst scenario.
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- (b) Write the method isBalanced, which returns true when the delimiters are balanced and returns false otherwise. The delimiters are balanced when both of the following conditions are satisfied; otherwise, they are not balanced. When traversing the ArrayList from the first element to the last element, there is no point at which there are more close delimiters than open delimiters at or before that point. The total number of open delimiters is equal to the total number of close delimiters. Consider a Delimiters object for which openDel is "<sup>" and closeDel is "</sup>".The examples below show different ArrayList objects that could be returned by calls togetDelimitersList and the value that would be returned by a call to isBalanced.Example 1The following example shows an ArrayList for which isBalanced returns true. As tokens areexamined from first to last, the number of open delimiters is always greater than or equal to the number of close delimiters. After examining all…// Only few methods are mentioned here //Do remaining methods to pass the test methods /*** Removes the specified (num) of the given element from the internal ArrayList of elements. * If num <= 0, don't remove anything. * If num is too large, remove all instances of the given element from the internal ArrayList of elements.* Example:* - For a defined CustomIntegerArrayList containing the integers: 1, 2, 1, 2, 1* - Calling remove(2, 1) would remove the first 2 instances of 1 * - The CustomIntegerArrayList will then contain the integers: 2, 2, 1* - For a defined CustomIntegerArrayList containing the integers: 100, 100, 100 * - Calling remove(4, 100) would remove all instances of 100 * - The CustomIntegerArrayList will then be empty* - For a defined CustomIntegerArrayList containing the integers: 5, 5, 5, 5, 5 * - Calling remove(0, 5) would remove nothing* * @param num number of instances of element to remove * @param element to remove*/ public void remove(int num, int element) {//…Determine if the following statements is true or false. Screen shot shows the text's arraycollection and sortedarraycollection With the text's array-based collection implementation, the set of stored elements is scattered about the array. The text's sorted array-based collection implementation stores elements in the lowest possible indices of the array. When comparing two objects using the equals method inherited from the Object class, what is actually compared is the contents of the objects.
- pet shop wants to give a discount to its clients if they buy one or more pets and at least five other items. The discount is equal to 20 percent of the cost of the other items, but not the pets.Use a class Item to describe an item, with any needed methods and a constructor public Item(double price, boolean isPet, int quantity)An invoice holds a collection of Item objects; use an array list to store them. In the Invoice class, implement methods public void add(Item anItem)public double getDiscount()Write a program that prompts a cashier to enter each price and quantity, and then a Y for a pet or N for another item. Use a price of –1 as a sentinel. In the loop, call the add method; after the loop, call the getDiscount method and display the returned value.Implement code to Find all the possible triplets from the array that can form the triangle./*** Given an array of tweets, find the ID of the tweet that* has the most "likes". Return -1 if the array is of length 0.* Do not worry about the case where the array is null or there are* multiple tweets with the same number of likes.* * * @param tweets the array of tweets* @return ID of the tweet with most likes if array is non-empty, 0 otherwise*/public static long mostLikedTweet(Tweet[] tweets) {throw new UnsupportedOperationException("Implement this"); }
- getSumEven Method; public static int getSumEven(int[] array) Returns the sum of even values (if any) present in the array parameter. You can assume array is not null. You may only use one auxiliary function. Your implementation must be recursive and you may not use any loop construct. Do not use ++ or -- in any recursive call argument. It may lead to an infinite recursion. For example, use index + 1, instead of index++. Parameters: array - Returns: Sum of even valuesA basic iterator offers all the following operations except Group of answer choices 1. Except nothing, it can do all of the listed operations. 2. Get the item at the current iteration 3. Return an array of all items 4. Determine if there are more items 5. Go to the next itemWrite the following method that returns an ArrayList from a set:public static <E> ArrayList<E> setToList(Set<E> s)
- There is an array of n integers. There are also 2 disjoint sets, A and B, each containing m integers. You like all the integers in set A and dislike all the integers in set B. Your initial happiness is 0. For each i integer in the array, if i E A, you add 1 to your happiness. If i E B, you add -1 to your happiness. Otherwise, your happiness does not change. Output your final happiness at the end. Note: Since A and B are sets, they have no repeated elements. However, the array might contain duplicate elements. Constraints 1≤ n ≤ 105 1≤m≤ 105 1 Any integer in the input ≤ 10⁹ Input Format The first line contains integers n and m separated by a space. The second line contains n integers, the elements of the array. The third and fourth lines contain m integers, A and B, respectively.There is an array of n integers. There are also 2 disjoint sets, A and B, each containing m integers. You like all the integers in set A and dislike all the integers in set B. Your initial happiness is 0. For each i integer in the array, if i E A, you add 1 to your happiness. If i E B, you add -1 to your happiness. Otherwise, your happiness does not change. Output your final happiness at the end. Note: Since A and B are sets, they have no repeated elements. However, the array might contain duplicate elements. Constraints 1≤n ≤ 105 1≤m≤ 105 1 Any integer in the input ≤ 10⁹ Input Format The first line contains integers n and m separated by a space. The second line contains n integers, the elements of the array. The third and fourth lines contain m integers, A and B, respectively.: You are given an array-like data structure Listy which lacks a sizemethod. It does, however, have an elementAt ( i) method that returns the element at index i in 0( 1) time. If i is beyond the bounds of the data structure, it returns -1. (For this reason, the data structure only supports positive integers.) Given a Listy which contains sorted, positive integers,find the index at which an element x occurs. If x occurs multiple times, you may return any index.
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