Free correlative resources on Vending Machine Java Class

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Java program to include methods?
I wrote this java program that performs functions of a vending mention. But now I need to write it using methods, how can I do this? Here is my code: (Any help would be greatly appreciated!import java.util.Scanner;import java.util.Random;public class VendingMachine{public static void main(String[] args){Scanner keyboard = new Scanner(System.in); // reader for standard inputRandom random = new Random(); // random number generatorint[] items = {65, 95, 50, 110, 75}; // prices for five items in centsint[] coins = {5, 10, 25, 100}; // nickel, dime, quarter and dollarboolean exactChange; // whether exact change is required flagint price; // price of itemint amount; // amount depositedboolean cancelSelection; // flag to indicate if selection is cancelledint sales; // total number of salesint remaining;int count;int choice;int select;char ch;exactChange = random.nextBoolean();sales = 0;choice = 1;do{if (sales == 10){System.out.println(“OUT-OF-SERVICE”);System.out.print(“Do Vending Machine Java Class you want to make the machine operational? (y/n): “);ch = keyboard.next().toUpperCase().charAt(0);if (ch == ‘Y’)sales = 0;}else{System.out.println(“———————–”);System.out.println(” Vending Machine “);System.out.println(“———————–”);for (int i=0; i= 1 && choice <= items.length){price = items[choice-1];amount = 0;cancelSelection = false;while (amount < price){System.out.println("-------------------");System.out.println(" Deposit Money ");System.out.println("-------------------");System.out.println("1. Nickel");System.out.println("2. Dime");System.out.println("3. Quarter");System.out.println("4. Dollar");System.out.println("5. Cancel selection");System.out.print("Enter the amount: ");select = keyboard.nextInt();if (select >= 1 && select <= 4){amount = amount + coins[select-1];}else if (select == 5){cancelSelection = true;break;}else{System.out.println("Error: you have entered an invalid selection, try again");}}if (!cancelSelection){if (!exactChange){if (amount == price){System.out.println("No change due");}else{System.out.println("Changes are:");remaining = amount - price;// get the number of one dollarscount = remaining / 100;if (count == 1)System.out.println("1 dollar");else if (count > 1)System.out.println(count + ” dollars”);remaining = remaining % 100;// get the number of 25 centscount = remaining / 25;if (count == 1)System.out.println(“1 quarter”);else if (count > 1)System.out.println(count + ” quarters”);remaining = remaining % 25;// get the number of 10 centscount = remaining / 10;if (count == 1)System.out.println(“1 dime”);else if (count > 1)System.out.println(count + ” dimes”);remaining = remaining % 10;// get the number of 5 centscount = remaining / 5;if (count == 1)System.out.println(“1 nickel”);else if (count > 1)System.out.println(count + ” nickels”);}}exactChange = random.nextBoolean();sales += 1;}}else if (choice != (items.length + 1)){System.out.println(“Error: you have entered invalid choice”);}}} while (choice != (items.length + 1));}}
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