Consider the doubly linked list below to answer the following: A) Write Java statements to delete the node with info 30 using the reference variable last. B) Write a single Java statement to change the value of the node containing 4 to be 14 using a reference variable first. C) Write Java statements to create a new node called newNode with a value of 70 in its info, and then add it to the last of the List. D) Write Java statements to print out the doubly linked list from the occurrence of info 32 to the end of the list in reverse order. first last, 17 32 19 30 1
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- Answer the given question with a proper explanation and step-by-step solution. Hello team, Need some help with problems below using the langauge JAVA. I need to modify the CalcParser class provided below. I need this to produce a string containing commands to evaluate the expression on a stack machine. For example, if you give the command java CalcParser 1+2*3, the output should be a sequence of stack commands such as this: push 1.0 push 2.0 push 3.0 multiply add 7.0 For the command java CalcParser (1+2)*3, on the other hand, it should print a sequence like this: push 1.0 push 2.0 add push 3.0 multiply 9.0 CODE:public class CalcParser { private CalcLexer lexer; private String errorMessage = null; private double value; public CalcParser(String s) { lexer = new CalcLexer(s);errorMessage = lexer.getErrorMessage();if (errorMessage != null) return; value = parseExpression();if (errorMessage != null) return; match(CalcLexer.EOLN_TOKEN);if (errorMessage != null) return; } public String…python 8.7 LAB: Writing append and search methods (singly-linked list)Given main.py and a Node class in Node.py, complete the LinkedList class in LinkedList.py by writing the append() and search() methods. The search() method should return the Node whose data value matches a given key, and None if the key is not found. The search() method should also set the position of each Node searched in the LinkedList, starting with 1. Ex: If the input is: 12 23 59 37 923 212the output is: 12 found in list at position 1.If the input is: 12 23 59 37 923 268the output is: 68 not found in list.Please dont copy and paste and give proper explanation. Suppose that a Java implementer is required to write a method which takes in as parameter a List of objects belonging to a Person class. Person has several subclasses including Employee. The method is supposed to return another List which consists of just the Employee objects from the original list. Describe two different ways of accomplishing this in Java.
- I have a computer-science question HW that needs help in JAVA Given list: ( 4, 21, 33, 53, 58, 59, 64, 69, 73, 98 ) Which list elements will be compared to key 59 using binary search? Enter elements in the order checked.1. Write a C program that will initially create a SORTED list containing the following and then run the program:DianeJackKatherineMitchRobbie Answer and explain the following questions below:a) If we check the memory location of each element in the list, what would it be? What index represent each element?b) What happens if we add Morrie in the list? What will be its index value? c) What does the new list looks like? Where do you think Morrie should be placed and why? With the same list above (with Morrie added), delete/remove Jack. Answer and explain the following questions below:a) What is the new list? Identify the elements of the list and its index.b) What happened to the former location occupied by Jack?Create a Java program. You have a list of Student ID's followed by the course number(separated by aa space) that the student is enrolled in. The listing is in no particular order. For eg. is student 1 is in CS100 and CS200 while student 2 is in CS105 and MATH210 then the list may look like this: 1 CS100 2 MATH210 2 CS105 1 CS200 Write a program that reads data in this format from the console. If the ID is -1 then stop inputting data. Use the HashMap class to map from an Integer(Student ID) to an ArrayList of type String that holds each class that the student is enrolled in. The declaration should look like this: HashMap<Integer, ArrayList<String>> students = new HashMap<Integer, ArrayList<String>>(); After all data is input, iterate through the map and output the student ID and all classes stored in the vector for that student. The result should be a list of classes organized by student id.
- please complete the following in JAVA Implement the graph ADT using the adjacency list structure. thanks! also posting a similar question for adjacency matrix. have a good day!Fix the code below so that there is a function that calculate the height of the triangle. package recursion; import javax.swing.*;import java.awt.*; /** * Draw a Sierpinski Triangle of a given order on a JPanel. * * */public class SierpinskiPanel extends JPanel { private static final int WIDTH = 810; private static final int HEIGHT = 830; private int order; /** * Construct a new SierpinskiPanel. */ public SierpinskiPanel(int order) { this.order = order; this.setMinimumSize(new Dimension(WIDTH, HEIGHT)); this.setMaximumSize(new Dimension(WIDTH, HEIGHT)); this.setPreferredSize(new Dimension(WIDTH, HEIGHT)); } public static double height(double size) { double h = (size * Math.sqrt(3)) / 2.0; return h; } /** * Draw an inverted triangle at the specified location on this JPanel. * * @param x the x coordinate of the upper left corner of the triangle * @param y the y…I'm developing a card game that requires one deck of 52 cards using Java. The 52 card has 4 suits from top to bottom: diamonds (d), clubs (c), hearts (h), and spades (s). Each card has a point. The rest of the instructions are in the images. Based on the code below, it outputs the maximum points of all 5 sorted cards. Instead, I need the total point chosen from the suit that gives the highest point. The images shown are for reference purposes. import java.util.HashMap; import java.io.*; public class CardPointsList { static HashMap<String,Integer> Code = new HashMap<>(); static HashMap<Character,Integer> Order = new HashMap<>(); static String[][] hand= {{ "c5","s6","sK","dK","dA"},{"s7","s4","dJ","sA","h5"},{"sQ","d3","c9","hK","d5"}}; static int[] scores={0,0,0}; public static void sortHand() { String temp; for (int h=0;h<3;h++) {for (int i=0;i<5;i++) { for (int j=i+1;j<5;j++) { if (hand[h][j].charAt(0)…
- Please add comments to the java code and clean code is appreciated. Thanks. Consider a linked list of items that are in no particular order. a. Write instructions to insert a node at the beginning of the linked list. Assume the linked list has only a head reference. b. Write instructions to delete a node at the beginning of the linked list. Assume the linked list has only a head reference. c. Write instructions to insert a node at the end of the linked list. Assume the linked list has only a head reference. d. Write instructions to delete a node at the end of the linked list. Assume the linked list has only a head reference. e. Write instructions to insert a node at the end of the linked list. Assume the linked list has a head reference and a tail reference. f. Write instructions to delete a node at the end of the linked list. Assume the linked list has a head reference and a tail reference. Note that you may need to consider special cases. For example, inset into an…Write a C program that will initially create an UNSORTED list containing the following and then run the program:MitchDianeJackRobbieKatherine Answer and explain the following questions below:a) If we check the memory location of each element in the list, what would it be? What index represent each element?b) What happens if we add Morrie in the list? What will be its index value? c) What does the new list look like? Where do you think Morrie should be placed and why? With the same list above (with Morrie added), delete/remove Jack. Answer and explain the following questions below:a) What is the new list? Identify the elements of the list and its index.b) What happened to the former location occupied by Jack?Answer the given question with a proper explanation and step-by-step solution. Write in Java: Write a menu-driven program to illustrate the use of a linked list. The entries will only consist of integer number keys (values). The program should implement the following options in order: • Insert- insert a key into a list- not allowing duplicate integers. • Delete- delete a key from the list. • Search- finds or does not find a particular key in the list. • Print- prints the list graphically in horizontal form. If the list is empty output- "Nothing to print". • Size- count of all the keys in the list. • Sort- sorts the keys in the list in ascending order. • Reverse- reverses the order of the keys in the list • Rotate- moves the key at the front of the list to the end of the list. If the list has 0 or 1 elements it should have no effect on the list. • Shift- rearranges the keys of a list by moving to the end of the list all values that are in odd number positions (indexes) and otherwise…