Question

////Fixme(1) add a statement to import ArrayList class

public class ListManipulation {
public static void main(String[] args) {

//Fixme(2) create an ArrayList of integers and name the ArrayList list.

//Fixme(3) add the following numbers to the list: 10, 15, 7, -5, 73, -11, 100, 20, 5, -1

  
displayList(list);
System.out.println();
displayListBackwards(list);
  
  
}
  
public static void displayList(ArrayList<Integer> list) {

for(Integer i: list)
System.out.print(i + " ");
  
}
//Fixme(4) define a method displayListBackwards, which takes an ArrayList as a parameter and returns nothing.
//The method displays each element in the list in the reverse order, and adds a space after each element.



//Fixme(5) define a method maxElement, which takes an ArrayList as a parameter and returns the maximum element in the list.
  
  
//Fixme(6) define a method searchElement, which takes two parameters.
//The first parameter is an ArrayList and the second is an int type value.
//The method searches for value in the list.
//If the value is found in the list, the method returns its index, otherwise, it returns -1.

  
//Fixme(7) define a method eventCount, which takes an ArrayList as a parameter and returns the number of even element in the list.

}

Answer 1

////Fixme(1) add a statement to import ArrayList class
import java.util.ArrayList;

public class ListManipulation {
    public static void main(String[] args) {

//Fixme(2) create an ArrayList of integers and name the ArrayList list.
        ArrayList<Integer> list = new ArrayList<Integer>();

//Fixme(3) add the following numbers to the list: 10, 15, 7, -5, 73, -11, 100, 20, 5, -1
        list.add(10);
        list.add(15);
        list.add(7);
        list.add(-5);
        list.add(73);
        list.add(-11);
        list.add(100);
        list.add(20);
        list.add(5);
        list.add(-1);

        displayList(list);
        System.out.println();
        displayListBackwards(list);
    }

    public static void displayList(ArrayList<Integer> list) {
        for (Integer i : list)
            System.out.print(i + " ");
        System.out.println();
    }

    //Fixme(4) define a method displayListBackwards, which takes an ArrayList as a parameter and returns nothing.
//The method displays each element in the list in the reverse order, and adds a space after each element.
    public static void displayListBackwards(ArrayList<Integer> list) {
        for (int i = 0; i < list.size(); i++) {
            System.out.print(list.get(i) + " ");
        }
        System.out.println();
    }

    //Fixme(5) define a method maxElement, which takes an ArrayList as a parameter and returns the findMaximumIndex element in the list.
    public static int maxElement(ArrayList<Integer> list) {
        int max = list.get(0);
        for (int i = 0; i < list.size(); i++) {
            if (list.get(i) > max)
                max = list.get(i);
        }
        return max;
    }

    //Fixme(6) define a method searchElement, which takes two parameters.
//The first parameter is an ArrayList and the second is an int type value.
//The method searches for value in the list.
//If the value is found in the list, the method returns its index, otherwise, it returns -1.
    public static int searchElement(ArrayList<Integer> list, int value) {
        for (int i = 0; i < list.size(); i++) {
            if (list.get(i) == value)
                return i;
        }
        return -1;
    }

    //Fixme(7) define a method eventCount, which takes an ArrayList as a parameter and returns the number of even element in the list.
    public static int eventCount(ArrayList<Integer> list) {
        int count = 0;
        for (int i = 0; i < list.size(); i++) {
            if (list.get(i) % 2 == 0)
                ++count;
        }
        return count;
    }
}