Question

 Create a Cow class. Make cows and put them in a collection. Write a method that removes cows from the collection based on a) name, b) legs.
 using Java

array list

Answer 1

Dear Student,

Please find the requested code below:

(Check the comments in the code for better understanding of every step in the code)

SOURCE CODE:

import java.util.*;
//importing the java.util.* package

//creating the class Cow
class Cow
{
  
}

//creating the class having a method to remove Cow ArrayList
class X
{

//method to remove ArrayList

    void rem(ArrayList x)
    {
      
    //clear() -- predefined method to remove arraylist
      x.clear();
    }
}

//main class to test the code
public class Main
{

//main method
public static void main(String[] args)
{
  
    //creating the ArrayList collection
ArrayList list = new ArrayList();

//creating the objects of Cow i.e say 3 cows
Cow c1=new Cow();
Cow c2=new Cow();
Cow c3=new Cow();

//adding into the ArrayList collection
list.add(c1);
list.add(c2);
list.add(c3);

//printing the collection to check whether inserted or not
System.out.println(list);


X y=new X();

//calling the method to remove ArrayList
y.rem(list);

//checking whether ArrayList removed or not
System.out.println(list);
}
}

OUTPUT:

[Cow@2a139a55, Cow@15db9742, Cow@6d06d69c]
[]

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