Write a program in Java that performs the following tasks: Create an ArrayList, HashMap and HashSet Objects. Add 2 entries to each one of them using an appropriate method.

java Create a static method that: is called appendPosSum returns an ArrayList of Integers takes one parameter: an ArrayList of Integers This method should: Create a new ArrayList of Integers Add only the positive Integers to the new ArrayList Sum the positive Integers in the new ArrayList and add the Sum as the last element For example, if the incoming ArrayList contains the Integers (4,-6,3,-8,0,4,3), the ArrayList that gets returned should be (4,3,4,3,14), with 14 being the sum of (4,3,4,3). The original ArrayList should remain unchanged.  public static void main(String[] args) {    Scanner in = new Scanner(System.in);    int size = in.nextInt();    ArrayList<Integer> list = new ArrayList<>();    for(int i=0; i < size; i++) {      list.add(in.nextInt());    }     System.out.println(appendPosSum(list));

In JAVA, use a HashMap to count and store the frequency counts for all the words from a large text document. Then, display the contents of this HashMap with given words and their frequency in the document. Next, please create a set view of the Map and store the contents in an array. Sort this array based on key value and display it. Finally, sort the array in decreasing order by frequency and display it.

Java Programming   This week's project involves a text file with that holds all of the novel Don Quixote*, by Miguel Cervantes. The text file has been heavily processed. It contains only lowercase letters, spaces, and new lines. That is a good format for counting words. Write code that reads through the text file one word at a time using a Scanner, and the next() method. Put the words into a HashMap, where the words are used as keys, and the values are Integers used to keep track of how many times the words occur in the text. If the text was "one fish two fish red fish blue fish one two three" then the HashMap would look like this:         key                value         "one"....        2         "fish"...        4         "two"....        2         "red"....        1         "blue"...        1         "three"..        1   Once you have created such a HashMap for the whole of the text you can write logic that prints out the answers to these questions: How many times does each of…