[hardwired]

Code:

public class ChairRx extends Item{

	// Let the superclass keep these items.
	// Keep things here that pertain more
	// specifically to Chair and less to Item, ie,
	// member variables not shared by Item.
//	private int chair1;
//	private float chair1_cost;
//	private String name;

	public ChairRx(){
	}

	public ChairRx(int chair1, float chair1_cost, String name){
		// Send these values to the superclass.
		super(chair1, chair1_cost, name);
	}

	public String toString() {
		return "ChairRx[item_number:" + item_number +
				", item_cost:" + item_cost +
				", manufacturers_name:" + manufacturers_name +
				"]";
	}

	public static void main(String[] args) {
		ChairRx chair1 = new ChairRx(1, 10.00f, "Allen");
		System.out.println("chair1 = " + chair1);
		ChairRx chair2 = new ChairRx(2, 25f, "Thomas");
		System.out.println("chair2 = " + chair2);
		System.out.println("chair1.getItemNum = " + chair1.getItemNum());
		System.out.println("chair1.getCost = " + chair1.getCost());
		System.out.println("chair1.getManufacturersName = " +
					chair1.getManufacturersName());
	}
}

class Item{
	protected int item_number;
	protected float item_cost;
	protected String manufacturers_name;
	public boolean TF;
	public boolean TF1;


	/* default constructor */
	Item(){
	}

	Item(int item_number, float item_cost, String manufacturers_name){
            // Use this way of initializing member variables
		this.item_number = item_number;
		this.item_cost = item_cost;
		this.manufacturers_name = manufacturers_name;
            // or use this way. No need to use both.
//		this.setItemNum(item_number);
//		this.setItemCost(item_cost);
//		this.setManufacturersName(manufacturers_name);
	}

	//////// These methods are inherited by subclasses ////////

	public boolean isItemnum1(){
		return TF;
	}

	public boolean isCost1(){
		return TF1;
	}

	public int getItemNum(){
		return item_number;
	}

	public float getCost(){
		return item_cost;
	}

	public String getManufacturersName(){
		return manufacturers_name;
	}

	public void setItemNum(int newitem_number){
		if (newitem_number < 0){
			TF = false;
			item_number = 0;
		}
		else {
			TF = true;
			item_number = newitem_number;
		}
	}

	public void setItemCost(float newitem_cost){
		if (newitem_cost < 0){
			TF1 = false;
			item_cost = 0;
		}
		else {
			TF1 = true;
			item_cost = newitem_cost;
		}
	}

	public void setManufacturersName(String newmanufacturers_name){
		manufacturers_name = newmanufacturers_name;

	}
}