Question

For this assignment you will be creating an array of objects or a list of objects of car parts based on user input.

1. Create a Parts class with the following items

a. Properties for PartNum, Part Name, Part Description, and Cost

b. Must have a constructor

2. In the main you will need accomplish the following:

a. Ask the user how many objects they wish to enter

b. Create an array of parts objects

c. Loop appropriately to collect the data needed to populate the objects in the array

d. Next you will do the following:

i. Give the user a menu of all parts

ii. Ask the user which part they would like to view data on

iii. Create a method to print out the object selected by user values.

Answer 1

################# Parts.java ####################

/**
* The Class Parts.
*/
public class Parts {

   /** The part num. */
   private int partNum;

   /** The part name. */
   private String partName;

   /** The part description. */
   private String partDescription;

   /** The cost. */
   private double cost;

   /**
   * Instantiates a new parts.
   *
   * @param partNum the part num
   * @param partName the part name
   * @param partDescription the part description
   * @param cost the cost
   */
   public Parts(int partNum, String partName, String partDescription, double cost) {
       this.partNum = partNum;
       this.partName = partName;
       this.partDescription = partDescription;
       this.cost = cost;
   }

   /**
   * Gets the part num.
   *
   * @return the part num
   */
   public int getPartNum() {
       return partNum;
   }

   /**
   * Gets the part name.
   *
   * @return the part name
   */
   public String getPartName() {
       return partName;
   }

   /**
   * Gets the part description.
   *
   * @return the part description
   */
   public String getPartDescription() {
       return partDescription;
   }

   /**
   * Gets the cost.
   *
   * @return the cost
   */
   public double getCost() {
       return cost;
   }

   /**
   * To string.
   *
   * @return the string
   */
   @Override
   public String toString() {
       return "Parts [partNum=" + partNum + ", " + (partName != null ? "partName=" + partName + ", " : "")
               + (partDescription != null ? "partDescription=" + partDescription + ", " : "") + "cost=" + cost + "]";
   }

}

############# CarPartShop.java ###############

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class CarPartShop {

   /**
   * The main method.
   *
   * @param args the arguments
   */
   public static void main(String[] args) {
       try {
           // Because of limitation of scanner. I'm using Buffer reader.
           BufferedReader sc = new BufferedReader(new InputStreamReader(System.in));
           System.out.println("Enter how many car parts you need to add: ");
           int numOfParts = Integer.parseInt(sc.readLine());
           Parts[] parts = new Parts[numOfParts];
           for (int i = 0; i < numOfParts; i++) {
               System.out.print("Enter part number: ");
               int partNum = Integer.parseInt(sc.readLine());
               System.out.print("Enter part name: ");
               String partName = sc.readLine();
               System.out.println("Enter description:    ");
               String partDesc = sc.readLine();
               System.out.println("Enter cost: ");
               double cost = Double.parseDouble(sc.readLine());
               parts[i] = new Parts(partNum, partName, partDesc, cost);
           }

           // showing menu.
           int partNum = showMenu(parts, sc);
           //showing part details
           for (Parts p : parts) {
               if (p.getPartNum() == partNum) {
                   System.out.println("Part Number: " + p.getPartNum());
                   System.out.println("Part Name: " + p.getPartName());
                   System.out.println("Part Description: " + p.getPartDescription());
                   System.out.println("Cost: $" + p.getCost());
               }
           }
       } catch (Exception e) {
           // TODO: handle exception
       }

   }

   /**
   * Show menu.
   *
   * @param parts the parts
   * @param sc the sc
   * @return the int
   * @throws NumberFormatException the number format exception
   * @throws IOException Signals that an I/O exception has occurred.
   */
   private static int showMenu(Parts[] parts, BufferedReader sc) throws NumberFormatException, IOException {
       for (Parts p : parts) {
           System.out.println("Part Number: " + p.getPartNum() + " Name: " + p.getPartName());
       }
       System.out.println("Enter part number to show details: ");
       return Integer.parseInt(sc.readLine());
   }
}