Question

1. Create a class named Blanket with fields for a blanket’s size, color, material, and price. Include a constructor that sets default values for the fields as Twin, white, cotton, and $30.00. Include a set method for each of the first three fields. The method that sets size adds $10 to the base price for a double blanket, $25 for a queen blanket, and $40 for a king. The method that sets the material adds $20 to the price for wool and $45 to the price for cashmere.

In other words, the price for a king-sized cashmere blanket is $115. Whenever the size or material is invalid, reset the blanket to the default values. Include a toString() method that returns a description of the blanket.

2. Create a child class named ElectricBlanket that extends Blanket and includes two additional fields: one for the number of heat settings and one for whether the electric blanket has an automatic shutoff feature. Default values are one heat setting and no automatic shutoff. Include get and set methods for the fields.

Do not allow the number of settings to be fewer than one or more than five; if it is, use the default setting of 1. Add a $5.75 premium to the price if the blanket has the automatic shutoff feature. Also include a toString() method that calls the parent class toString() method and combines the returned value with data about the new fields to return a complete description of features.

Answer 1

class Blanket
{
   private String size,color,material;
   private double price;
  
   public Blanket()
   {
       size = "Twin";
       color = "white";
       material = "cotton";
       price = 30.0;
   }
  
   public void setSize(String size)
   {
       this.size = size;
       if(size == "Twin")
       this.price = this.price + 10;
       else if(size == "Queen")
       this.price = this.price +25;
       else if(size == "King")
       this.price = this.price +40;
   }
   public void setColor(String color)
   {
       this.color = color;
   }
   public void setMaterial(String material)
   {
       this.material = material;
       if(material == "wool")
       this.price = this.price + 20;
       else if(material == "cashmere")
       this.price = this.price +45;
       else if(size == "King")
       this.price = this.price +40;
   }
   public double getPrice()
   {
       return price;
   }

public String toString()
{
   return "Blanket size : "+size +" color : "+color +" material : "+material + " Price : "+getPrice();
  
}
}
class ElectricBlanket extends Blanket
{
   private int numHeatSettings;
   private boolean automaticShutOff;
  
   public ElectricBlanket()
   {
       super();
       numHeatSettings = 1;
       automaticShutOff = false;
      
   }
   public void setNumHeatSettings(int numHeatSettings)
   {
       if(numHeatSettings < 5)
       this.numHeatSettings = 1;
       else
      
       this.numHeatSettings = numHeatSettings;
   }
   public int getNumHeatSettings()
   {
       return numHeatSettings;
   }
   public void setAutomaticShutOff(boolean automaticShutOff)
   {
      
      
       this.automaticShutOff = automaticShutOff;
   }
   public boolean getAutomaticShutOff()
   {
       return automaticShutOff;
   }
  

public String toString()
{
    return super.toString() +" Number of Heat Settings : "+numHeatSettings+" Has automatic shut off : "+ automaticShutOff;
}

public double getPrice()
{
    if(automaticShutOff == true)
    return (super.getPrice() + 5.75);
    else
    return super.getPrice();
}
}

class TestBlanket
{
   public static void main (String[] args)
   {
       ElectricBlanket eb = new ElectricBlanket();
       eb.setSize("King");
       eb.setColor("green");
       eb.setMaterial("Kashmere");
       eb.setAutomaticShutOff(true);
       eb.setNumHeatSettings(6);
      
       System.out.println(eb);
       System.out.println("Price : "+eb.getPrice());
      
      
   }
}

Output:

Blanket  size : King color : green material : Kashmere   Price : 115.75  Number of Heat Settings : 6  Has automatic shut off : true
Price : 115.75

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