(Java) Use the interface \"ArrayBag\" implementation and do the following: 1) Ad

Question

(Java) Use the interface "ArrayBag" implementation and do the following:

1) Add a new class that models a Thing.

2) Thing class should define at least the following:

a. Data members: alphanumeric id, int value, color as a string and material as a string.

b. Methods: default constructor, rand, print, toString and list. These methods are explained as follows:

-    default constructor: sets all data members to values of your choice but need to be justified.

-    rand: randomly generates an instance of Thing by setting all data members to random values. (more details/demo in class).

-    print: displays all data members of a Thing object in one line

-    toString: returns a string containing exactly the same info displayed by print().

-    list: creates and returns a “ArrayList” of Thing objects.

3) Add a new method to the given ArrayBag “print” that prints all objects contained in the bag.

4) Add a Driver/Demo/Test class to test the methods of Thing and ArrayBag.

Note: There's no need for any explanation, just use //to show which method is which. Need this ASAP, thanks!

EDIT: Color and material can be anything, for example color can be blue and material can be leather. As for the ArrayBag interface definition the ArrayBag should have the following things: alphanumeric id, int value, color as a string and material as a string. Originally, color, material, alphanumeric id, and value should only be created, and then the constructor will give them set values of your choosing. (eg. id: Bag001. Color: Blue. Material: Leather. Value: $50). the method rand should just generate random values for each of the data members (color, material, value, etc.)

Explanation / Answer

PROGRAM CODE:

ArrayBag.java

package arrays;

public interface ArrayBag {
  
   String COLOR[] = {"Blue", "Red", "Yellow", "Green", "White"};
   String MATERIAL[] = {"Leather", "Wood", "Polyester", "Plastic", "Iron"};
   String alphabetID[]= {"A", "B", "C", "D", "E"};
  
   void print();
}

Thing.java

package arrays;

import java.util.ArrayList;
import java.util.Random;

public class Thing implements ArrayBag{
  
   private int value;
   private String id, color, material;
  
   //constructor
   public Thing( String id, int value, String color, String material) {
       this.id = id;
       this.value = value;
       this.color = color;
       this.material = material;
   }
  
   //default constructor
   Thing()
   {
       value = -1;
       id = "";
       color = "";
       material = "";
   }
   //rand() - generates random number and selects values from provided list in ArrayBag
   public void rand()
   {
       Random rand = new Random();
       this.id = alphabetID[rand.nextInt(5)] + (rand.nextInt(1000) + 1000);
       this.value = rand.nextInt(1000);
       this.color = COLOR[rand.nextInt(5)];
       this.material = MATERIAL[rand.nextInt(5)];
   }
   @Override
   public void print() {
       System.out.println(id + " " + value + " " + color + " " + material);
      
   }
   @Override
   public String toString() {
       // TODO Auto-generated method stub
       return id + " " + value + " " + color + " " + material;
   }
   //created list and returns it
   public ArrayList list()
   {
       ArrayList list = new ArrayList();
       for(int i=0; i<5; i++)
       {
           Thing thing = new Thing();
           thing.rand();
           list.add(thing);
       }
       return list;
   }
}

ArrayBagTester.java

package arrays;

public class ArrayBagTester {

   public static void main(String[] args) {
       Thing thing = new Thing();
       thing.rand();
       System.out.println(thing);
       System.out.println(thing.list());
   }

}

OUTPUT:

A1987 555 Red Iron
[B1847 696 Yellow Plastic, E1636 471 Green Polyester, C1374 734 Red Plastic, A1814 505 White Wood, B1830 27 White Leather]

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