List:Remove Stuff

/**
 * Jessica Wong Pd.4
 * Write the following methods and test them on the given lists. Once they work, create your own list and test the methods on them.
 *
 * 1) For a list of Strings, write a method, dupString, that will duplicate all elements that have 3 or more characters
 *      Ex: [The, constant, Pi, is, Awesome] should become [The, The, constant, constant, Pi, is, Awesome, Awesome]
 *
 * 2) For a list of Integers, write a method, removeEvens, that will remove all even integers from the list.
 *      Ex: [1, 2, 2, 3, 3, 4, 4, 5, 6, 7, 8, 9, 10] should become [1, 3, 5, 7, 9]
 *
 * 3)  For a list of Doubles, write a method, setToFive. If the current element is greater than 5, then it should be set to 5.0
 *      Ex: [1.2, 5.4, 7.2, 2.8, 9.8] should become [1.2, 5.0, 5.0, 2.8, 5.0]
 *
 * Challenge:
 * 3) For a list of Doubles, write a method, setToAverage. If the current element is greater than 5, then it should be set to the average of the remaining elements in the list.
 *      Ex: [1.2, 5.4, 7.2, 2.8, 9.8] should become [1.2, 6.6, 6.3, 2.8, 9.8]  where 6.6 is the average of 7.2, 2.8, and 9.8 and 6.3 is the average of 2.8 and 9.8. 9.8 doesn't change because
 *          there are no elements remaining in the list.
 *
 */
import java.util.*;

public class Main {

    public static void main(String[] args) {
        //You can create a list and then add elements one at a time
        List<String> lstStr = new ArrayList<>();
        lstStr.add("Hi");
        lstStr.add("Bye");
        lstStr.add("Mr. Peterson");
        lstStr.add("Comp Sci");
        //or you can add elements using a loop
        for (int count = 65; count < 91; count++) {
            String s;
            if(count%2==0)
                s = ""+(char)count+(char)(count)+(char)(count)+(char)(count)+(char)(count);
            else
                s = ""+(char)count+(char)(count);
            lstStr.add(s);
        }

        //You can print the elements of your list using a loop
        for(int i =0; i<lstStr.size(); i++) {
            System.out.print(lstStr.get(i)+" ");
        }
        System.out.println();

        //or you can use the List interface's toString method and just print the list (with prettiness too!)
        System.out.println(lstStr);

        //You can create a list like you would an array in the following way
        List<Integer> lstInt = new ArrayList<>(Arrays.asList(1,2,2,3,3,4,4,5,6,7,8,9,10));
        System.out.println(lstInt);

        List<Double> lstDoub = new ArrayList<>(Arrays.asList(1.2, 5.4, 7.2, 2.8, 9.8));
        System.out.println(lstDoub);

        List<Double> lstDoub2 = new ArrayList<>(Arrays.asList(1.2, 5.4, 7.2, 2.8, 9.8));
        System.out.println(lstDoub2);

        //Now you will test the methods. DO NOT ALTER THE LISTS ABOVE.
        System.out.println();
        System.out.println("Here are the results of my methods: ");
        dupString(lstStr);
        System.out.println(lstStr);

        removeEvens(lstInt);
        System.out.println(lstInt);

        setToFive(lstDoub);
        System.out.println(lstDoub);

        setToAverage(lstDoub2);
        System.out.println(lstDoub2);

        //CREATE YOUR OWN LISTS AND TEST THE METHODS BELOW

        List<String> list1 = new ArrayList<>(Arrays.asList("The","mitochondria","is","the","powerhouse","of","the","cell")); //converts array 2 list
        System.out.println(list1);

        List<Integer> list2 = new ArrayList<>(Arrays.asList(13,24,1,3,6,2,6,8,12,65,13,86,23,54,23,85,43,32,7));
        System.out.println(list2);

        List<Double> list3 = new ArrayList<>(Arrays.asList(3.2,5.5,3.8,1.5,2.8,9.5,6.4,7.3,1.2,10.2));
        System.out.println(list3);

        List<Double> list4 = new ArrayList<>(Arrays.asList(40.2,13.3,24.7,18.2,15.2,85.2,57.2));
        System.out.println(list4);

        System.out.println();
        System.out.println("Here are the results of my methods: ");

        dupString(list1);
        System.out.println(list1);

        removeEvens(list2);
        System.out.println(list2);

        setToFive(list3);
        System.out.println(list3);

        setToAverage(list4);
        System.out.println(list4);
    }

    public static void dupString(List<String> lst) {

        for(int i=0; i<lst.size(); i++){
            if(lst.get(i).length()>=3){
                lst.add(i,lst.get(i));
                i++;
            }
        }
    }

    public static void removeEvens(List<Integer> lst) {

         for(int i=0; i<lst.size(); i++){
             if(lst.get(i)%2==0){
                 lst.remove(i);
                 i--;
             }
        }
    }

    public static void setToFive(List<Double> lst) {

        for(int i=0; i<lst.size(); i++){
            if(lst.get(i)>5.0){
            lst.set(i,5.0);
            }
        }
    }

    public static void setToAverage(List<Double> lst) {

        double sum=0;
        double count=-1;
        for(int i=0; i<lst.size(); i++){
            sum+=lst.get(i);
            count++;
        }

        for(int i=0; i<lst.size(); i++){
                sum = sum-lst.get(i);
                if(lst.get(i) > 5.0 && count>0){
                lst.set(i,sum/count);
                }
                count--;
        }
    }
}