Question 19 aConsider the following statement, which is intended to create an ArrayList named years that can be used to store elements both of type Integer and of type String./* missing code */ = new ArrayList();Which of the following can be used to replace /* missing code */ so that the statement compiles without error?ArrayList yearsBArrayList years()ArrayList years[]DArrayList yearsEArrayList years

Answer: A. ArrayList years ArrayList years=new ArrayList(), This statement is old non generic…

Question 19 A Consider the following statement, which is intended to create an ArrayList named years that can be used to store elements both of type Integer and of type String. 1* missing code */ = new Arraylist(); Which of the following can be used to replace /* missing code */ so that the statement compiles without error? ArrayList years в ArrayList years ( ) Arraylist years[) D ArrayList years ArrayList years

Question 19 A Consider the following statement, which is intended to create an ArrayList named years that can be used to store elements both of type Integer and of type String. 1* missing code / = new Arraylist(); Which of the following can be used to replace / missing code */ so that the statement compiles without error? ArrayList years в ArrayList years ( ) Arraylist years[) D ArrayList years ArrayList years

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Computer Science Part 2: Client Program with ArrayList Create a second client program. This program will contain an ArrayList of StudentGrades objects. The program will perform the following tasks: Create an instance of an ArrayList that will store three StudentGrades objects. Each element in the ArrayList represents student grades for a test (assessment). This means that each StudentGrades object stored by the ArrayList element represents the grades achieved by students for a single test. Prompt the user for the number of students in the class. The prompt text is: Enter the number of students in the course: [Keyboard Input] Add three new StudentGrades objects to the ArrayList. The StudentGrades objects should be populated with random values from 0 to 100. Use the enhanced for loop to print each of the StudentGrades objects to the console. Print a line containing the following text: “LAST ELEMENT BEFORE REMOVE:”. Print the value of the final element in the ArrayList under the heading.…
please help me with the pseudocode for this I need it. Student Name Student Id Student Grades (an array of 3 grades) A constructor that clears the student data (use -1 for unset grades) Get functions for items a, b, and c, average, and letter grade Set functions for items a, n, and c Note that the get and set functions for Student grades need an argument for the grade index. Need another class which will contain: An Array of Students (1 above) A count of the number of students in the use You need to create a menu interface that allows you to: Add new students Enter test grades Display all the students with their names, ids, test grades, average, and letter grade Exit the program
Rewrite the client program to use the Baby class that you have done using ArrayList. You should also have the following function in this new client program: a) Enter details for each baby (name and age) and thus populate the Baby ArrayList b) Calculate and display the average age of all babies in the ArrayList c) Ask the user to enter the name of a baby, and then remove it from the ArrayList d) Allow the user to add new baby information in the ArrayList e) Output the details of each baby from the ArrayList (name and age) Compare this client program using the ArrayList with the client program you have done using array, comment on the differences between the two. Modify your client program in the last question, by adding a sort function such that when that option is selected, it sorts the ArrayList using the baby names in alphabetical order and output the details in the sorted ArrayList to a CSV (sortedbabylist.csv) file. public class Baby { private String name; private int age;…
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.
Functions with 2D Arrays in Java Write a function named displayElements that takes a two-dimensional array, the size of its rows and columns, then prints every element of a two-dimensional array. Separate every row by a new line and every column by a space. In the main function, call the displayElements function and pass in the required parameters. Output 1 2 3 4 5 6 7 8 9
The capacity of an ArrayList O a. indicates the maximum number of elements allowed b. causes the size of the internal array to grow each time an element is added O. is set at a constant value when the code is compiled O d. is the number of items the ArrayList can hold without growing
Path: p QUESTION 17 Display the value of the object pointed by cgPtr of type integer. T E E TTT Arial 3 (12pt) Path: p QUESTION 18 Declare and initialize array priceList with150.00, 235.00, 45.00, 23.75, 78.50. TTT Arial 3 (12pt) v T-E E- Path p Click Saue and Suhmit
iven an array of integers return the sum of the values stored in the first and last index of the array. The array will have at least 2 elements in it error_outline Homework solutions you need when you need them. Subscribe now. arrow_forward Question Given an array of integers return the sum of the values stored in the first and last index of the array. The array will have at least 2 elements in it public class Class1 { public static int endSum(int[] values) { //Enter code here } } Use Java and show output screenshot and implementation screenshot Please don't copy from other websites.
Part 1: Add the code of the ArrayListType to your code. Part 2: Create an Ordered_List class derived from the ArrayListType then add the following function to this class: Constructor to create an array of the size specified by the parameter size. The default array size is 20. Sorted Insert this function takes an integer values then add it to the list this function should check whether the value exist in the list or not. If it is already exist then it will not be inserted to the list, this function should keep the list ordered. Remove function to remove an item from the list. The function takes a single parameter that specifies the number to be removed. • Sequential Search a function to search the list for an integer if exist return its location otherwise return -1. This function specifies the number we are looking for as a parameter. Part 3: Implement the following non-member functions to deal with the Ordered List objects: Load file: this function should read a text file consist an…
Input Parameters: sea: an array of integers indices': an array of integers (each of which may or may not be a valid index for sea") Assumptions: sea may be empty. indices may be empty. *indices may contain duplicates. What to return? - For each integer value in 'indices', if it is a valid index for input array ssa', then use it to index into 'sea' and include the result in the output array. For example: Say ssa' is (23, 46, 69} and indices' is (2, -1, 0, 3, 0, 2} (where indices -1 and 3 are invalid, so only indices 2, 0, 0, 2 are used) Then the method should return (69, 23, 23, 69} Note: Order of elements in the output array corresponds to the order in which valid indices in the 'indices' array are arranged. That is, the output array may be empty if the input array sea is empty, or if the input array indices does not contain any valid indices. See the JUnit tests related to this method. */ public static int () task1(int ) seq, int () indices) { int (] result - null; return result;
Part 1: Add the code of the ArrayListType to your code. Part 2: Create an Ordered_List class derived from the ArrayListType then add the following function to this class: Constructor to create an array of the size specified by the parameter size. The default array size is 20. Sorted Insert this function takes an integer values then add it to the list this function should check whether the value exist in the list or not. If it is already exist then it will not be inserted to the list, this function should keep the list ordered. Remove function to remove an item from the list. The function takes a single parameter that specifies the number to be removed. • Sequential Search a function to search the list for an integer if exist return its location otherwise return -1. This function specifies the number we are looking for as a parameter. Part 3: Implement the following non-member functions to deal with the Ordered List objects: Load file: this function should read a text file consist an…
DNA Max Write code to find which of the strands representing DNA in an array String[] strands representing strands of DNA has the most occurrences of the nucleotide represented by parameter nuc. Complete the definition of the class DnaMax and method definition maxStrand shown below. If more than one strand has the same maximal number of the specified nucleotide you should return the longest strand with the maximal number. All DNA strands have different lengths in this problem so the maximal strand will be unique when length is accounted for. Return this uniquely maximal strand. Each String representing a DNA strand will contain only cytosine, guanine, thymine, and adenine, represented by the characters 'c', 'g', 't', and 'a', respectively. If no strand in the array contains the specified nucleotide return the empty string "". public class DnaMax { public String maxStrand(String[] strands, String nuc) { // fill in code here } } Constraints strands will contain no more than 50 elements,…