What is the difference in the result of returning the words in a HashSet compared with returning them in an ArrayList?

How do I read a sequence of values in a file into a arraylist in a method? It's in java progarmming.

Given that an ArrayList of Strings named friendList has already been created and names have already been inserted, write the statement necessary to change the name "Tyler", stored at index 8, to "Bud".     This is needed in Java

Java ArrayLists can only be filled with reference type data, so you cannot fill them with primitive type data. How can you work around this with integers? (How can you have an ArrayList filled with integers?)

How can | iterate over the ArrayList made up of integers using the while loops in the java programming language?

In writing a general-purpose sort method in Java, the sort method needs to compareobjects. There are two ways to give the sort method the code to compare objects,implementing the interfaces Comparable and Comparator respectively. Extend Article class toimplement Comparable interface so that the default sorting of the Articles is by its volume

Can someone help me with this code, I not really understanding how to do this?   import java.util.ArrayList;import java.util.HashMap;import java.util.Map;/*** @version Spring 2019* @author Kyle*/public class MapProblems {/*** Modify and return the given map as follows: if the key "a" has a value, set the key "b" to* have that value, and set the key "a" to have the value "". Basically "b" is confiscating the* value and replacing it with the empty string.** @param map to be edited* @return map*/public Map<String, String> confiscate(Map<String, String> map) {if (map.containsKey("a") && map.containsValue("a")) {}}/*** Modify and return the given map as follows: if the key "duck" has a value, set the key* "goose" to have that same value. In all cases remove the key "swan", the rest of the map* should not change.** @param map to be edited* @return map*/public Map<String, String> mapBird1(Map<String, String> map) {throw new UnsupportedOperationException("Not…

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.

Hello!I'm currently in the process of developing an algorithm for a reverse method for a singly-linked list--not an array, which is a much easier algorithm and I have done before. I'm writing in Java. I'm working from a pre-written SinglyLinkedList class with certain methods (intentionally) empty, for us to fill.I have, unbelievably, spent somewhere around 5 hours going through drafts. The easiest implementation I've conceived of would be to create a second list with which to import the nodes and elements starting from the tail. public void reverse() {<Integer> list2 = new SinglyLinkedList();for (size) {  list2.addLast(tail);  list1.remove(tail); }}This is the rough draft pseudocode for the aforementioned implementation.If we were to work within the same list, instead of creating a new one we would have to go through, for a size of 10, a hundred iterations. Obviously, there are a number of problems.First, reverse() has been defined as a void method. It's not supposed to return…