va code 12. Given an existing ArrayList named contactList, find the number of contacts in the ArrayList and store it in the existing variable named numContacts.
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12. Given an existing ArrayList named contactList, find the number of contacts in the ArrayList and store it in the existing variable named numContacts.
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- JAVA LANGUAGE Create an ArrayList, Name it YourRegNoandName that can hold Integers, and fill each slot with a different random value from 1-50. Display those values on the screen, and then prompt the user for an integer to search through the ArrayList, and if the item is present, say “FOUND”. It is not necessary to display anything if the value was not found. If the item is in the ArrayList multiple times, it's okay if the program prints the message more than once. ALSO SCREENSHOT THE OUTPUTJava 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.Write the statement that declares and instantiates an array of type double using the identifier temperatures that will hold 30 values. Edit View Insert Format Tools Table 12pt v Paragraph v :
- Write code that creates an ArrayList that can hold String objects. Add the names of three cars to the ArrayList, and then display the contents of the ArrayList.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 9The purpose of this exercise is to create an Array List data structure that mimics the behavior of the Java Standard Library Version. Task Check List ONLY "for" loops should be used within the data structure class. The names of identifiers MUST match the names listed in the description below. data fields: The fields to declare have private accessibility. size : stores the number of occupied locations in internal array, and is of type int. data : is a reference variable for the internal array and is of type E[ ]. constant: Use to describe defaults. DEFAULT_CAPACITY is a constant that holds a default capacity of ten (10) for the underlying array, is of type int , public accessibility and modified to static. constructors: The overloaded constructors will initialize the data fields size and data. The default constructor calls the second constructor, generating an internal array with the specified DEFAULT_CAPACITY. public ArrayList() The second constructor generates an…
- in C#, Visual Basic Write an app for Boston Airlines that allows a customer to reserve a seat on the airline’s only plane (capacity: 10 seats). Radio buttons should allow the choice between First Class and Economy. The app should then assign a seat in the first-class section (seats 1–5) or the economy section (seats 6–10). Use a one-dimensional array of type bool to represent the seating chart of the plane. Initialize all the elements of the array to false to indicate that all the seats are empty. As each seat is assigned, set the corresponding element of the array to true to indicate that the seat is no longer available. Your app should never assign a seat that has already been assigned. When the economy section is full, your app should ask the person if it is acceptable to be placed in the first-class section (and vice versa). If yes, make the appropriate seat assignment. If no, display the message “Next flight leaves in 3 hours."Java code 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.Main difference between an array and an ArrayList is that an ArrayList can store more data types an ArrayList can store more elements an ArrayList executes faster for retrieval and insertion an ArrayList takes care of the memory management automatically an ArrayList uses positions and an array uses indices
- Make a shopping cart program that implements the ArrayList class. Make a class named Item.java that contains the following data members, item_name, quantity, and price. Create the appropriate constructors and methods to initialize, access, and manipulate the data members, also create a toString method to print the item name, quantity, and price. Create an ArrayList of Items in the Main.For the INPUTThe user will enter the item name, quantity, and price of each item. A 'Y' will add another item to the shopping cart, and 'N' will stop the input.For the OUTPUTThe program then lists the items in the shopping cart using the toString method in the Item class. Calculate for the subtotal and total of the items in the cart.Format your toString method to have a double tab, "\t\t", after the item name, single tab, "\t", after quantity and double tab, "\t\t", after price. EXAMPLEINPUTPencil215.25yYellow Paper150.00nOUTPUTPencil 2 15.25 30.50Yellow Paper 1 50.00…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.Problem #3. Design an ArrayList that asks the user to input 10 numbers. Get the sum of evennumbers, odd numbers, positive numbers, and negative numbers.Class Name: ArrayListSumPostitiveNegativeNumbersSample Input/Output:Enter the 10 values of the ArrayList12345-1-2-3-4-5The sum of even numbers is: 0The sum of odd numbers is:0The sum of positive numbers is:15The sum of negative numbers is:-15 Machine Problem #4. Design an ArrayList that asks the user to input 15 numbers. Get the highest and smallestvalueClass Name: ArrayListBiggestSmallestSample Input/Output:Enter the values of the 3-D array:123456789101112131415The highest value is: 15The smallest value is: 1 use java language