Image that you had a working implementation of the arrayList class that you wrote for integers. Write a method equals(ArrayList list2) that you could add to your arraylist class. The equals(ArrayList Iist2) method should take a second list as a parameter and that returns true if the two lists are equal and that returns false otherwise. Two lists are considered equal if they store exactly the same values in exactly the same order and have exactly the same length.
please find below the required code;
arrayList.java
import java.util.ArrayList;
import java.util.Arrays;
/***
*
* arrayList class
*
* @param <E>
*/
public class arrayList<E> {
//list of arraylist
private static ArrayList<Integer> list;
/***
* equals method that will take another list argument
* and comapre with above list
* @param list2
* @return
*/
public boolean equals(ArrayList<E> list2)
{
//if both list’s size not equal
//return false
if(list.size()!=list2.size())
{
return false;
}
//checking equality of element
//at every index for both list
for(int i=0;i<list.size();i++)
{
//if both value not equals
//return false
if(!list.get(i).equals(list2.get(i)))
return false;
}
return true;
}//end of equals method
/***
* Main method for execution for above program
* @param args
*/
public static void main(String[] args) {
arrayList<Integer> obj = new arrayList<>();
//declared an array
Integer i[]={3,5,2,5,2,5,2,5};
//adding the array elements to arraylist
list= new ArrayList<Integer>(Arrays.asList(i));
//declared one more arraylist for comparision
//added the same element
ArrayList<Integer> list2= new ArrayList<>(Arrays.asList(i));
//checking for equality
System.out.print(“list equals to list2 : “);
System.out.println(obj.equals(list2));
//added one more array
Integer j[]={23,3,5,2,5,2,5,2,5};
//created new arraylist with array j
//it should return false as it have diiff element
ArrayList<Integer> list3= new ArrayList<>(Arrays.asList(j));
System.out.print(“list equals to list3 : “);
System.out.println(obj.equals(list3));
}
}//end of class
OUTPUT:
please do let me know if u have any doubts or want me modify code….
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