Write a value returning method that returns the sum of the elements in the last column of each row in a two-dimensional array of ints. Include code to test your method.
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JAVA
Chapter 9 Multidimensional Arrays and the ArrayList Class
Write a value returning method that returns the sum of the elements in the last column of each row in a two-dimensional array of ints. Include code to test your method.
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- Arrays: create an array of a given type and populate its values. Use of for loop to traverse through an array to do the following : to print the elements one by one, to search the array for a given value. ArrayList: create an ArrayList containing elements of a given type . Use some of the common ArrayList methods to manipulate contents of the ArrayList. Write methods that will take an ArrayList as its parameter/argument ; and/or return an ArrayList reference variable as its return type. Searching for an object in an Array: Loop through the ArrayList to extract each object and to check if this object’s attribute has a given value. Explain how and why interfaces are used in Java Collection Framework. Explain the major differences between a Stack and a Queue. Be able to use stack and queue methods. What is meant by O(N) notation? Express the complexity of a given code using the O(N) notation.1. Shift Left k Cells Use Python Consider an array named source. Write a method/function named shiftLeft( source, k) that shifts all the elements of the source array to the left by 'k' positions. You must execute the method by passing an array and number of cells to be shifted. After calling the method, print the array to show whether the elements have been shifted properly. Example: source=[10,20,30,40,50,60] shiftLeft(source,3) After calling shiftLeft(source,3), printing the array should give the output as: [ 40, 50, 60, 0, 0, 0 ]Two-Dimensional ArrayInstruction:Create a java program that generates elements (randomly from 10 – 75) of a 2-dimensional array (5x5) using the Random Class then perform the following: NOTE: Please do not use the array methods available on the internet. Use the for loop, while loop or do-while loop statement in your codes.
- 2. Rotate Left k cells Use Python Consider an array named source. Write a method/function named rotateLeft( source, k) that rotates all the elements of the source array to the left by 'k' positions. You must execute the method by passing an array and number of cells to be shifted. After calling the method, print the array to show whether the elements have been shifted properly. Example: source=[10,20,30,40,50,60] rotateLeft(source,3) After calling rotateLeft(source,3), printing the array should give the output as: [ 40, 50, 60, 10, 20, 30]Circular Array 1. Palindrome Use python Write a method/function that takes in a circular array, its size and start index and finds whether the elements in the array form a palindrome or not. Return true if the elements form a palindrome, otherwise, return false. Example: Input: [20,10,0,0,0,10,20,30] (start =5, size=5) Output: True. Input:[10,20,0,0,0,10,20,30] (start =5, size=5) Output: FalseRotate Right k cells (use python) Consider an array named source. Write a method/function named rotateRight( source, k) that rotates all the elements of the source array to the right by 'k' positions. You must execute the method by passing an array and number of cells to be shifted. After calling the method, print the array to show whether the elements have been shifted properly. Example: source=[10,20,30,40,50,60] rotateRight(source,3) After calling rotateRight(source,3), printing the array should give the output as: [ 40, 50, 60, 10, 20, 30]
- getListRowIndices Method public static java.util.ArrayList<java.lang.Integer> getListRowIndices(int[][] array, int rowLength) This method returns an ArrayList with the indices of rows of the two-dimensional having a length that corresponds to rowLength. You may only use one auxiliary method. The method should create an ArrayList that is passed to the auxiliary in order to place the indices (if any). If no indices are found, an empty (size of 0) ArrayList will be returned. You can assume the array parameter will not be null and every row of the two-dimensional array has an array with a size of at least 0. 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 - rowLength - Returns: ArrayList<Integer>Whenever programmer passes an array to a method, the method receives length of array copy of middle element reference of array copy of last elementMethod Implementation Design and implement a method to swap the first and the last element of an array. For example, 1 4 9 16 25 would be transformed into 25 4 9 16 1. Important: You don’t need to test this method in main(). You don’t need to initialize the array. You don’t print out the values in the method. All you need to do is swap the first with the last element. pubilc static void swapFirstLast(int [] arr) {
- 2D arrays (matrices/grids) Write a program that takes 20 student objects and stores them in an array. Each Student object should have a first name and a last name. Sort the array by student’s last name. You can use any of the sorts you have. Then put the names into a 2D array that has 5 rows and 4 columns. Create 2 seating charts by printing the 2D array. Student 17 Student 18 Student 19 Student 20 Student 13 Student 14 Student 15 Student 16 Student 9 Student 10 Student 11 Student 12 Student 5 Student 6 Student 7 Student 8 Student 1 Student 2 Student 3 Student 4 Student 5 Student 10 Student 15 Student 20 Student 4 Student 9 Student 14 Student 19 Student 3 Student 8 Student 13 Student 18 Student 2 Student 7 Student 12 Student 17 Student 1 Student 6 Student 11 Student 16SECTION#2: Searching elements from Array and ArrayList Question No#3: Write down one java program to search element and its position from ArrayList and from Array.8. Repetition Use Python Language Write a method that takes in an array as a parameter and counts the repetition of each element. That is, if an element has appeared in the array more than once, then its 'repetition' is its number of occurrences. The method returns true if there are at least two elements with the same number of 'repetition'. Otherwise, return false. Input: {4,5,6,6,4,3,6,4} Output: True Explanation: Two numbers repeat in this array: 4 and 6. 4 has a repetition of 3, 6 has a repetition of 3. Since two numbers have the same repetition output is True. Input: {3,4,6,3,4,7,4,6,8,6,6} Output: False Explanation: Three numbers repeat in this array:3,4 and 6 .3 has a repetition of 2, 4 has a repetition of 3, 6 has a repetition of 4. Since no two numbers have the same repetition output is False.