Define an empty array with 4 elements inside the "main" method. The value '-1' from the user to this array Record the numbers entered by the user in order until they arrive. User array with 4 elements After adding, write the required method so that it can continue adding elements. This method will take the array as a parameter, expand the size of the array and return the array variable. will return. Using this method you defined, the user can add elements to the array.

Problem: Write a method that will determine whether a given value can be made given an array of coin values. For example, each value in the array represents a coin with that value. An array with [1, 2, 3] represents 3 coins with the values, 1, 2, and 3. Determine whether or not these values can be used to make a desired value. The coins in the array are infinite and can only be used as many times as needed. Return true if the value can be made and false otherwise. Dynamic Programming would be handy for this problem. Data: An array containing 0 or more coin values and an amount. Output: Return true or false. Sample Data ( 1, 2, 3, 12, 5 ), 3 ( 4, 15, 16, 17, 1 ), 21 ( 1 ), 5 ( 3 ), 7 Sample Output true true true false

This is the question - In the exercises in Chapter 6, you created a class named Purchase. Each Purchase contains an invoice number, amount of sale, amount of sales tax, and several methods. Add get methods for the invoice number and sale amount fields so their values can be used in comparisons. Next, write a program that declares an array of five Purchase objects and prompt a user for their values. Then, in a loop that continues until a user inputs a sentinel value of Z, ask the user whether the Purchase objects should be sorted and displayed in invoice number order or sale amount order. This is the code I have. The programming isn't likeing what I have at all for the area where it says to write code -  public class Purchase {    private int invoiceNumber;    private double saleAmount;    private double tax;    private static final double RATE = 0.05;    public void setInvoiceNumber(int num)    {       invoiceNumber = num;    }    public void setSaleAmount(double amt)    {…

A method named getUserStringsAndPopulate Array(). This method should keep prompting the user to enter as many strings as the user wants. The user should be able to stop entering strings by entering EXIT. This method should take the strings entered by the user and populate a one-dimensional array of strings with the user input. The string EXIT should NOT be added to the array because it is a special flag that will tell the method to stop prompting the user to enter more strings. This method should return the one-dimensional array of strings populated with user input and should not accept any arguments. 2.b) A method named searchArray() that would accept a one-dimensional array of strings and search the array for the string Winter. The search logic should NOT be case sensitive. If a match is found, this method should print the string in the array followed by a message like "  --- Found a match!". Otherwise, the method should not print anything. This method should NOT return anything.…