Answer:
public class ArrayMethodDemo {
public static void main (String args[]) {
int[] numbers = {12, 15, 34, 67, 4, 9, 10, 7};
int limit = 12;
display(numbers);
displayReverse(numbers);
displaySum(numbers);
displayLessThan(numbers, limit);
displayHigherThanAverage(numbers);
}
public static void display(int[] numbers) {
//Message to be displayed before printing out the numbers
System.out.print("Numbers in the array: ");
//loop through the numbers in the array and print each number
for(int x: numbers){
System.out.print(x + " ");
}
//print a new line
System.out.println();
}
public static void displayReverse(int[] numbers) {
//Message to be displayed before printing out the reverse of the array
System.out.print("Reverse of the array numbers: ");
//loop through the array starting from the last index
for(int i = numbers.length - 1; i > 0; i--){
System.out.print(numbers[i] + " ");
}
//print a new line
System.out.println();
}
public static void displaySum(int[] numbers) {
//initialize the sum variable
int sum = 0;
//loop through the array and add each element to sum
for(int i = 0; i < numbers.length; i++){
sum += numbers[i];
}
//print out the sum
System.out.println("Sum: " + sum);
}
public static void displayLessThan(int[] numbers, int limit) {
//Text to be displayed before printing values less than the limit
System.out.print("Values less than limit (" + limit + "): ");
//loop through the array and print numbers lower than the specified limit
for(int i = 0; i < numbers.length; i++){
if(numbers[i] < limit){
System.out.print(numbers[i] + " ");
}
}
//print a new line
System.out.println();
}
public static void displayHigherThanAverage(int[] numbers) {
//initialize the average variable
double average = 0.0;
//initialize the sum variable
int sum = 0;
//loop through the array and add each element to sum
for(int i = 0; i < numbers.length; i++){
sum += numbers[i];
}
//calculate the average
average = sum / numbers.length;
//Message to be displayed before printing the values higher than the average
System.out.print("Values higher than average (" + average + "): ");
//loop through the array and print numbers higher than the calculated average
for(int i = 0; i < numbers.length; i++){
if(numbers[i] > average){
System.out.print(numbers[i] + " ");
}
}
//print a new line
System.out.println();
}
}
Sample Output:
Numbers in the array: 12 15 34 67 4 9 10 7
Reverse of the array numbers: 7 10 9 4 67 34 15
Sum: 158
Values less than limit (12): 4 9 10 7
Values higher than average(19.0):34 67
Step-by-step explanation:
The code above contains comments explaining important parts of the code. Kindly go through the comments. A sample output, arising from running the application, has also been added to ace understandability.