Create a new Java project/class called ChangeUp. Create an empty int array of size 6. Create a method called populateArray that will pass an array, use random class to choose a random index and prompt the user to enter a value, store the value in the array. Note: Generate 6 random index numbers in an attempt to fill the array. Create a method called printArray that prints the contents of the array using the for each enhanced loop. Submit code. Note: It is possible that your array won't be filled and some values will still have 0 stored. That is acceptable.

Answer:

//import the Random and Scanner classes

import java.util.Random;

import java.util.Scanner;

//Begin class definition

public class ChangeUp {

   

   //Begin the main method

  public static void main(String args[]) {

       //Initialize the empty array of 6 elements

      int [] numbers = new int [6];

       

       //Call to the populateArray method

       populateArray(numbers);

       

       

   } //End of main method

   

   

   //Method to populate the array and print out the populated array

   //Parameter arr is the array to be populated

   public static void populateArray(int [] arr){

       

       //Create object of the Random class to generate the random index

       Random rand = new Random();

       

       //Create object of the Scanner class to read user's inputs

       Scanner input = new Scanner(System.in);

       

       //Initialize a counter variable to control the while loop

       int i = 0;

       

       //Begin the while loop. This loop runs as many times as the number of elements in the array - 6 in this case.

       while(i < arr.length){

           

           //generate random number using the Random object (rand) created above, and store in an int variable (randomNumber)

           int randomNumber = rand.nextInt(6);

       

           //(Optional) Print out a line for formatting purposes

           System.out.println();

           

           //prompt user to enter a value

           System.out.println("Enter a value " + (i + 1));

           

           //Receive the user input using the Scanner object(input) created earlier.

           //Store input in an int variable (inputNumber)

           int inputNumber = input.nextInt();

           

           

           //Store the value entered by the user in the array at the index specified by the random number

           arr[randomNumber] = inputNumber;

           

           

           //increment the counter by 1

          i++;

           

       }

       

       

       //(Optional) Print out a line for formatting purposes

       System.out.println();

       

       //(Optional) Print out a description text

      System.out.println("The populated array is : ");

       

       //Print out the array content using enhanced for loop

       //separating each element by a space

       for(int x: arr){

           System.out.print(x + " ");

       }

   

       

  } //End of populateArray method

   

   

   

} //End of class definition

Explanation:

The code above is written in Java. It contains comments explaining the lines of the code.

This source code together with a sample output has been attached to this response.

Answer:

import java.util.Random;

import java.util.Scanner;

public class ArrayExample {

   public static void main(String[] args) {

       int[] array = new int[6];

       populateArray(array);

       printArray(array);

   }

 

   public static void populateArray(int[] array) {

       Random random = new Random();

       Scanner scanner = new Scanner(System.in);

       boolean[] filledIndexes = new boolean[6];

     

       for (int i = 0; i < 6; i++) {

           int index = random.nextInt(6);

         

           while (filledIndexes[index]) {

               index = random.nextInt(6);

           }

         

           filledIndexes[index] = true;

         

           System.out.print("Enter a value for index " + index + ": ");

           int value = scanner.nextInt();

           array[index] = value;

       }

   }

 

   public static void printArray(int[] array) {

       System.out.println("Array contents:");

       for (int value : array) {

           System.out.print(value + " ");

       }

   }

}

Explanation:

In the code provided, we are creating an array of size 6 to store integer values. The objective is to populate this array by taking input from the user for specific indexes chosen randomly.

To achieve this, we have defined two methods: populateArray and printArray.

The populateArray method takes an array as a parameter and fills it with values provided by the user. Here's how it works:

We create an instance of the Random class to generate random numbers and a Scanner object to read user input.We also create a boolean array called filledIndexes of the same size as the main array. This array will keep track of the indexes that have already been filled.Next, we use a loop to iterate six times (since we want to fill six elements in the array).Inside the loop, we generate a random index using random.nextInt(6). However, we want to make sure that we don't fill the same index twice. So, we check if the index is already filled by checking the corresponding value in the filledIndexes array.If the index is already filled (i.e., filledIndexes[index] is true), we generate a new random index until we find an unfilled one.Once we have a valid, unfilled index, we mark it as filled by setting filledIndexes[index] to true.We then prompt the user to enter a value for the chosen index and read the input using scanner.nextInt(). We store this value in the main array at the corresponding index.This process is repeated six times, ensuring that each index is filled with a unique value.

The printArray method is responsible for printing the contents of the array. It uses a for-each enhanced loop to iterate over each element in the array and prints its value.

**By separating the population and printing logic into separate methods, the code becomes more modular and easier to understand.**