Question

Task 01:

(a)Write a class Fruit with:

• private instance variables name, and pricePerKilogram
• Appropriate constructor
• Appropriate accessor methods
• Appropriate mutator methods
• toString method
• equals method

(b) Write a FruitDriver class that:

• Initializes an array of Fruit objects, fruitArray, with 10 objects with names: banana, apple, mango, orange,pineapple, pear, grapes, tangerine, watermelon, sweetmelon and appropriate prices per kilogram.
• Uses an appropriate loop to display all objects with pricePerKilogram > 5.00 Saudi Riyals, if any.
• Calls a linearSearch method:   

                    public static boolean findFruit(Fruit targetFruit, Fruit[] fruitArray)

                the method ruturnstrue if targetFruit is in the fruitArray; otherwise it returns false.

• Displays the result of the search using an appropriate message

Task 02:

Write a Java application that initializes an array of Strings with the following strings:

          "Hot Peppers"      "Onions"    "Milk"   "Eggs"   "Rice"

The program must then use a loop to get the first character of each string in the array and make a new word with those letters. The program finally prints the new word.

Answer 1

Java code for task 1

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class Fruit
{
   private String name;
   private float pricePerKilogram;
  
  
  
   public Fruit(String name, float pricePerKilogram) {
       this.name = name;
       this.pricePerKilogram = pricePerKilogram;
   }
   public String getName() {
       return name;
   }
   public float getPricePerKilogram() {
       return pricePerKilogram;
   }
   public void setName(String name) {
       this.name = name;
   }
   public void setPricePerKilogram(float pricePerKilogram) {
       this.pricePerKilogram = pricePerKilogram;
   }
  
   @Override
   public boolean equals(Object obj) {
       if (this == obj)
           return true;
       if (obj == null)
           return false;
       if (getClass() != obj.getClass())
           return false;
       Fruit other = (Fruit) obj;
       if (name == null) {
           if (other.name != null)
               return false;
       } else if (!name.equals(other.name))
           return false;
       if (Float.floatToIntBits(pricePerKilogram) != Float
               .floatToIntBits(other.pricePerKilogram))
           return false;
       return true;
   }
   @Override
   public String toString() {
       return "Fruit [name=" + name + ", pricePerKilogram=" + pricePerKilogram
               + "]";
   }
     
  
  
  
}
public class FruitDriver {
  
   public static boolean findFruit(Fruit targetFruit, Fruit[] fruitArray)
   {
       boolean b=false;
       for(int i=0;i<fruitArray.length;i++)
       {
           if(fruitArray[i].equals(targetFruit))
           {
               b=true;
               break;
           }
       }
      
      
       return b;
   }
     

   public static void main(String[] args) {
       // TODO Auto-generated method stub
       Fruit f[]=new Fruit[10];
       String s[]={"banana","apple","mango","ornage","pineapple","pear","grapes","tangerine","watermelon","sweetmelon"};
       float price[]={4.5f,100f,200f,30f,78f,2.0f,89f,34f,45f,34f};
       for(int i=0;i<10;i++)
       {
           f[i]=new Fruit(s[i],price[i]);
       }
      
       for(int i=0;i<10;i++)
       {
           if(f[i].getPricePerKilogram()>5.00f)
           {
               System.out.println(f[i]);
           }
       }
      
       boolean b= findFruit(f[2],f);
       if(b==true)
       System.out.println(f[2]+"is present in Fruit array");
       else
           System.out.println(f[2]+"is not present in Fruit array");
      
       Fruit temp=new Fruit("cheery",342.2f);
       b= findFruit(temp,f);
       if(b==true)
       System.out.println(temp+"is present in Fruit array");
       else
           System.out.println(temp+"is not present in Fruit array");
      
   }

}

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Output