Analyse the imperative program code as shown in Listing 1. Adapt each of the programming methods using functional programming concepts. Your solution code should consider higher-order function, method references, functional interfaces or lambda expression, function pipelining, nullable object, collection of objects and etc. Listing 1:- Imperative programing paradigm - code sample:import java.io.IOException;import java.nio.file.*;import java.util.*;import java.util. regex. Pattern;public class OrderHandler {);) );}private static final String FILENAME = "data/delivery item.txt";List data;public OrderHandler() {try {}data = Files. readAllLines ( Paths.get( FILENAME ) );} catch (IOException e) {e.printStackTrace();}//display all order information except the heading textvoid print List> orderLst ) {for (int i = 0; i < orderLst.size(); i++) {System.out.println( orderLst.get(i));}}//collect all orders and split them with '\'List> collect() {List> orderLst = new ArrayList();for (int i = 0; i < data.size(); i++) {}if(!data.get(i).startsWith("PARCELITEM")) {String[] split = data.get(i).split( Pattern.quote("\\")orderLst.add( Arrays.asList( split ) );}}return orderLst;}//compute the total payment of order placeddouble computePaymnt ( List> orderLst ) {double sum = 0;for (int i = 0; i < orderLst.size(); i++) {int countorderLst.get(i).size();double charge = Double.parseDouble( orderLst.get(i).get(count-1sum + charge;}return sum;}//export to order object comprises name and charges onlyList populate( List> orderLst ) {List items = new ArrayList();for (int i = 0; i < orderLst.size(); i++) {int countorderLst.get(i).size();String first = orderLst.get(i).get(0);String last = orderLst.get(i).get(count-1);items.add(new Item( first, last));}return items; PARCELITEM\WEIGHT\DELIVERYTIME\RECIPIENT\POSTINGADDR\CONTACT\CASHPIZZAHUT\500GRAM\12:00PM\STEPHEN\APU AT TPM\0389900000\29.90KFC\400GRAM\2:00PM\THOMAS\SRIPETALING\038998888\59.90MACDONAL\300GRAM\8:00PM\MICKEY\SETAPAK\0341414141\59.80CHICKKENCHOP\250GRAM\7:30PM\JOHNSON\BUKITJALIL\0387878787\19.80STEAK\150GRAM\8:30PM\HELEN\SERDANG\0322223333\29.80

To create a file in java, we need to import java.io.File package.File object is an abstract…

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Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Analyse the imperative program code as shown in Listing 1. Adapt each of the programming methods using functional programming concepts. Your solution code should consider higher-order function, method references, functional interfaces or lambda expression, function pipelining, nullable object, collection of objects and etc.