Question

In Java:

Create an array of Integers with 10 elements, loop (use a for loop) through the array of integers printing their values to the screen.

Create an array of Strings with 10 elements, loop (use a for loop) through the array of Strings printing their values to the screen.

Finally, create an ArrayList of Integers. Use the loop from part 1 above and add each integer as you print it to the ArrayList as well, then start a final loop (using the for each nomenclature) to print out the list of Integers.

Answer 1

Below is the complete and running Java code (well commented, indented for your understanding ) containing all the three implementations. Also attached are the sample output and the code screenshots.

import java.util.ArrayList;

class Example
{
        public static void main (String[] args) throws java.lang.Exception
        {
                //declare array of size 10 of type integer
                //and initialize the array
                int [] array = new int[] {1,2,3,4,5,6,7,8,9,10};
                
                System.out.println("Integer Array");
                for(int i = 0; i<array.length ; i++) { //loop through the array
                    System.out.println("Element at index " + i + " = "+ array[i]);
                }
                
                //declare string array of size 10
                String[] str_array = new String[] {"This","is","an","example","java","program","for",
                                                      "learning","arrays","."};
                
                System.out.println("\nString Array");
                for(int i = 0; i<str_array.length ; i++) {
                    System.out.println("Element at index " + i + " = "+ str_array[i]);
                }
                
                ArrayList<Integer> array_list = new ArrayList<Integer>(); //creates an empty array list
                for(int i = 0; i<array.length ; i++) {
                    array_list.add(array[i]);  //add element at index i in array to array_list
                }
                
                //print the arraylist
                for (int i : array_list) {
          System.out.println(i);
        }
        }
}

Output and screenshots:

Integer Array
Element at index 0 = 1
Element at index 1 = 2
Element at index 2 = 3
Element at index 3 = 4
Element at index 4 = 5
Element at index 5 = 6
Element at index 6 = 7
Element at index 7 = 8
Element at index 8 = 9
Element at index 9 = 10

String Array
Element at index 0 = This
Element at index 1 = is
Element at index 2 = an
Element at index 3 = example
Element at index 4 = java
Element at index 5 = program
Element at index 6 = for
Element at index 7 = learning
Element at index 8 = arrays
Element at index 9 = .
1
2
3
4
5
6
7
8
9
10

Screenshots: (to refer indentation)

JAVA (HotSpot 8u 112) 1 2 3 7 8 9 11 import java.util.ArrayList; class Example 4-{ 5 public static void main (String[] args) throws java.lang. Exception { //declare array of size 10 of type integer //and initialize the array int [] array = new int[] {1,2,3,4,5,6,7,8,9,10}; 10 System.out.println("Integer Array"); 12 for(int i = 0; i<array.length; i++) { //loop through the array System.out.println("Element at index ” + i + " = "+ array[i]); } 15 //declare string array of size 10 17 String[] str_array = new String[] {"This", "is", "an", "example","java", "program", "for", "learning", "arrays", "."}; System.out.println("\nString Array"); for(int i = 0; i<str_array.length; i++) { System.out.println("Element at index "+ str_array[i]); } 13 14 18 19 20 21 22 + i + = ArrayList<Integer> array_list = new ArrayList<Integer>(); // creates an empty array list for(int i = 0; i<array.length; i++) { array_list.add(array[i]); //add element at index i in array to array_list } 24 25 26 27 28 29 30 31 32 33 34 //print the arraylist for (int i : array_list) { System.out.println(i); } } 16:0

Please do let me know for sure if you have any kind of doubts/questions regarding the solution or anything, I would be happy to help you. Thanks