Answered: How does a map tell us when an element…

How does a map tell us when an element is not found? A The map returns a null reference. B The map throws an exception. C The map returns an empty data object. D The map returns a value of zero.

EBK JAVA PROGRAMMING

9th Edition

ISBN:9781337671385

Author:FARRELL

Publisher:FARRELL

Chapter12: Exception Handling

Section: Chapter Questions

Problem 8RQ

See similar textbooks

Similar questions

Challenge 3: Scores.java and TestScores.java Implement a Scores class. The class constructor should accept an array of scores as its argument. The class should have a method that returns the average of the scores. If any score in the array is negative or greater than 100, the class should throw an IllegalArgumentException. Implement a TestScores class that creates an array and fills it with numbers given by the user. It should catch the exception thrown when the user enters an illegal value.
Exception handling allows for the programmer to account for incidences that can go wrong at run time and not crash the program. True False The Val function converts a string argument to a numeric value. True False Objects must be self contained and communicate with the host application only through its interface. True False To insure that previously assigned values are not lost when an array is re-dimensioned, you should use the Preserve keyword. True False Message boxes are the most common way for an object to return information to the developer. True False It is not possible to have more than one array in any given form. True False A loop counter can be decremented by starting at the highest value and using a negative Step value True False Tables within datasets hold returned data from SQL. True False Code execution begins at the top of the loop clause and then repeats the body of the loop until a predetermined condition is met. True False A module contains code and variable…
1- The FloatArray class stores a dynamic array of floats and its size. It has:- A parameterized constructor that takes the array size. - An add method that adds a float at the end of the array.- Overloading for the insertion operator << to write the array to afile (ofstream)- Overloading for the extraction operator >> to read the array elements from the file (ifstream) and add them to the array.- A destructor to deallocate the array2- The SortedArray inherits from FloatArray. It has:- A parameterized constructor that takes the array size. - An add method that adds a float at the right place in the arraysuch that the array remains sorted with every add. Don’t add to the array then sort but rather add in the right place.3- The FrontArray inherits from FloatArray. It has:- A parameterized constructor that takes the array size. - An add method that adds a float at the front of the array.4- The PositiveArray that inherits from SortedArray. It has:- A parameterized constructor…
True or False? Instantiating an array of objects reserves room to store references only.
public Movie remove(Movie movie) {// Step 1: Throw an exception if the thing you want to remove is null// Step 2: Search through the array and try to find movie.Movie removed = null;/* *for (int i = 0;...) { *if(movies[i].equals(movie)) {* ... *} *} */// Step 3: Throw an exception if you failed to find the movie,// else return the movieif (removed == null) {// Throw exception if movie is still null}return movie;}
code: public class PasswordGeneratorAndStorage {/*** Adds an application to the applications ArrayList. If index is -1, add application* to the end of applications. Else is index is within the size of applications, add* application at that index in applications. Otherwise, return. However, if applications * or application is null, return.* * @param applications* @param application* @param index*/public static void addApplication(ArrayList<String> applications, String application, int index) {// TODO: FILL IN BODY}/*** Generates a random password of length passwordLength and adds it to the end of* passwords if index is -1, or adds it to the index of passwords if index is within the* size of passwords (similar to how the addApplication adds an application). To generate* the random password, use rand to generate a random int within the size of characters. You* can then use this int to grab the char at that index in characters and concatenate that* to your String password variable.…
WorkArea 1st object 2nd object 3rd object 1- Write the code that declares an array of Rectangle objects, called rectangles, and stores in it three objects with the following data: length width 20 25 30 10 15 30 Area of object 1: 200 Area of object 2: 375 Area of object 3: 900 Interactive Session ? 2- Write the code of a for loop that displays the areas of n objects from the rectangles array you declared in the previous task. The output of the for loop. when n = 3, should look like this: Note: Make sure to use the integer n in your for loop. Workbench Additional Notes: Regarding your code's standard output, CodeLab will ignore case errors and will ignore whitespace (tabs, spaces, newlines) altogether. Visible newlines 0 00 0? 0! 0x 1- Visible whitespace MacBook Air Display stdin ✔Display stdout Mill
I need this now please help me out.
ReadInstructor. The class will: – Create an array of instructor objects – Read the instructors.txt file – Create an Instructor object for each line of input and store the object in the array. – After closing the file, it will print out a line for each instructor in the array. Input file:Mary Smith 1991 50000.00 John Jones 2000 90000.00 Terry Seidel 1992 51000.00 Jessica Terrell 2000 91000.00
Number each step please! Create a program that 1. Initializes a game object. 2. Reads a file of signs and stores each sign in an ArrayList<String> in the game object. 3. Reads a file of outcomes, storing each outcome twice in a two-dimensional array in the game object (diagonals should be empty). 4. Prints out the list of signs and the two-dimensional array of outcomes to the screen.
Please create a Java class that has the following data attributes and methods: private int count - number of customers in the array private customer Record[] data - array of customerRecord objects public customer List() constructor that should initialize memory for data array and count value public void getCustomerList(String fileName) - reads a file call fileName which is a text file containing lines (records) of customer data. This method fills the data array with the records from the file. The file will not have more than 100 records and will have the following format (where customer Number is an integer, firstName and lastName are Strings, and balance is a float: customerNumber firstName lastName balance public customerRecord getCustomer(int customerNumber) - returns the object corresponding to the customer with customerNumber. If the customer number is not in the array, return null. public void enter CustomerRecord(customerRecord new_record)…
CLASSES, DYNAMIC ARRAYS AND POINTERS Define a class called textLines that will be used to store a list of lines of text (each line can be specified as a string). Use a dynamic array to store the list. In addition, you should have a private data member that specifies the length of the list. Create a constructor that takes a file name as parameter, and fills up the list with lines from the file. Make sure that you set the dynamic array to expand large enough to hold all the lines from the file. Also, create a constructor that takes an integer parameter that sets the size of an empty list. in C++ Write member functions to: remove and return the last line from the list add a new line onto the end of the list, if there is room for it, otherwise print a message and expand the array empty the entire list return the number of lines still on the list take two lists and return one combined list (with no duplicates) copy constructor to support deep copying remember the destructor!