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.

Assignment 5A: Multiple Frequencies. In the last assignment, we calculated the frequency of a coin flip. This required us to have two separate variables, which we used to record the number of heads and tails. Now that we know about arrays, we can track the frequency of all numbers in a randomly generated sequence. For this program, you will ask the user to provide a range of values (from 1 to that number, inclusive) and how long of a number sequence you want to generate using that number range. You will then generate and save the sequence in an array. After that, you will count the number of times each number occurs in the sequence, and print the frequency of each number. Hints: You can use multiple arrays for this assignment. One array should hold the number sequence, and another could keep track of the frequencies of each number. Sample Output #1: What's the highest number you want to generate?: 5 How Long of a number sequence do you want to generate?: 10 Okay, we'll generate 10…

Computer Science JAVA #7 - program that reads the file named randomPeople.txt sort all the names alphabetically by last name write all the unique names to a file named namesList.txt , there should be no repeats

17. Phone Book ArrayList Write a class named PhoneBookEntry that has fields for a person's name and phone number. The class should have a constructor and appropriate accessor and mutator methods. Then write a program that creates at least five PhoneBookEntry objects and stores them in an ArrayList. Use a loop to display the contents of each object in the ArrayList.

IN C++   Write a method that lets you insert a number anywhere in an array that is already full. For instance, if you have an array of size 5: 3,6,1,2,0. You should be able to insert the number 9 in some desired/specified position. E.g 3,6,1,9,2,0.

This is needed in JAVA

What occurs when using the ref or out keyword with an array parameter?

What’s the difference between an array and Vector?

I need the answer as soon as possible

TASK 1: Write a Java program that do the following: [10 Marks] 1. Define and create an ArrayList which is called "itemsList" of Integer objects. [1 mark] 2. Define and create an array which is called "numList" with five integer vales. [1 mark] 3. Copy the five values from the array "numList" o ArrayList using a for loop. [2 marks] 4. Display the contents of the ArrayList with a message using the for loop with the get method. marks] 5. Display the size of ArrayList with a message. [1.5 mark] 6. Find the sum of ArrayList. [3 marks] [1.5