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Q: Write a statement that creates an ArrayList object and assigns its address to a variable named…
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- 1) What is one main disadvantage of an ArrayList? 2) Write a Java statement to create an ArrayList called list to hold 25 integers. 3) What is the type of the ArrayList defined in question number 2? 4) Write a for loop to initialize the objects in the ArrayList created in question number 2 above to -1.In python within a class class name: Object create a code cell in a jupyter notebook to produce an outcome using three different defintions the cell should produce a list of values that are the first 10 powers of 4, starting from 4 ** 0 up to 4**15. use the arange, fill, and __pow__ methodsmyMusic MusicOrganizor ArrayListeString fles String String String "MorningBlues.mp3 "DontGo.mp3 "MatchBoxBkues.mp3 What is the type of objects are stored in files in given diagram? b. Write the correct statement to remove the second object from the collection. c. Write a method called "ListAllFiles" to Iterate and print a list of all the files in the collection using Iterator object. d. Show diagram that if you add one student name into the above array list how it looks like? a.
- You may have found it somewhat tedious and unpleasant to use the debugger and visualizer to verify the correctness of your addFirst and addLast methods. There is also the problem that such manual verification becomes stale as soon as you change your code. Imagine that you made some minor but uncertain change to addLast]. To verify that you didn't break anything you'd have to go back and do that whole process again. Yuck. What we really want are some automated tests. But unfortunately there's no easy way to verify correctness of addFirst and addLast] if those are the only two methods we've implemented. That is, there's currently no way to iterate over our list and get bad its values and see that they are correct. That's where the toList method comes in. When called, this method returns a List representation of the Deque. For example, if the Deque has had addLast (5) addLast (9) addLast (10), then addFirst (3) called on it, then the result of toList() should be a List with 3 at the…createDatabaseOfProfiles(String filename) This method creates and populates the database array with the profiles from the input file (profile.txt) filename parameter. Each profile includes a persons' name and two DNA sequences. 1. Reads the number of profiles from the input file AND create the database array to hold that number profiles. 2. Reads the profiles from the input file. 3. For each person in the file 1. creates a Profile object with the information from file (see input file format below). 2. insert the newly created profile into the next position in the database array (instance variable).Java code 8. Given an existing ArrayList named friendList, find the first index of a friend named Sasha and store it in a new variable named index. 9. Given that an ArrayList of Integers named numberList has already been created and several values have already been inserted, write the statement necessary to insert the value 25 at the end of the list. 10. Declare an integer array named evens and fill it with even numbers from 2 through 10 in one statement. 11. Given an existing array named pets, find the size of the array and store it in a new variable named numPets. 12. Given an existing ArrayList named contactList, find the number of contacts in the ArrayList and store it in the existing variable named numContacts.
- I need the answer as soon as possible2DArray method:It will allocate a block of memory which represents a two-dimension arraybased on the input values supplied by the user. Ask the user to enter the number of rows andcolumn for 2D array that the user want to manipulate. The number of rows and columns that theuser enters may or may not define a square matrix (when the number of rows equals the numberof columns). The array will have exactly rows time columns (m * n) elements. It will notcontain any extra or empty cells. Initialize the “matrix” by rows with random number between 1to 100. Pass two arguments by out reference so that you can assign the number of row andcolumns of data to the first and second arguments. This is return 2D array method afterallocating new memory for 2D array and initialize it with random value. Generate randomnumber code in C# as following: Random randnum = new Random( );int number = randnum.Next (1, 101);SwapRow method: it will rotate the data in the matrix in an up/down method such that the…In this project you will generate a poker hand containing five cards randomly selected from a deck of cards. The names of the cards are stored in a text string will be converted into an array. The array will be randomly sorted to "shuffle" the deck. Each time the user clicks a Deal button, the last five cards of the array will be removed, reducing the size of the deck size. When the size of the deck drops to zero, a new randomly sorted deck will be generated. A preview of the completed project with a randomly generated hand is shown in Figure 7-50.
- Given the following pseudocode, convert it into the corresponding flowchart. myList(array) { for outerCount := 0 to size-2 do minIndex := outerCount; for innerCount:= outerCount+1 to size – 1 do if array[innerCount] < array[minIndex] then minIndex:= innerCount endloop swap array[outerCount] with array[minIndex]. endloop End//end function myListException 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…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