Arrays and Linked Lists

As a senior engineer with extensive experience in data structures and algorithms, you are well aware of the importance of arrays and linked lists in programming.

Arrays are one of the most fundamental data structures. They are a collection of elements of the same type stored in contiguous memory locations. Arrays provide efficient random access to elements based on their index. They are commonly used for storing and accessing data in a sequential manner.

Consider the following Java code snippet that demonstrates the usage of an array:

1int[] arr = {1, 2, 3, 4, 5};
2System.out.println("Array: " + Arrays.toString(arr));

Running this code will output the array: [1, 2, 3, 4, 5].

Linked lists are another important data structure. Unlike arrays, linked lists do not require contiguous memory locations for storing elements. Each element in a linked list, called a node, contains a value and a reference to the next node.

Consider the following Java code snippet that demonstrates the usage of a linked list:

1LinkedList<Integer> linkedList = new LinkedList<>();
2linkedList.add(1);
3linkedList.add(2);
4linkedList.add(3);
5linkedList.add(4);
6linkedList.add(5);
7System.out.println("Linked List: " + linkedList);

Running this code will output the linked list: [1, 2, 3, 4, 5].

Arrays and linked lists have their own advantages and use cases. Understanding their differences and knowing when to use each data structure is crucial for designing efficient and optimized algorithms. By leveraging arrays and linked lists, you can solve various programming challenges and build scalable applications.

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class Main {

  public static void main(String[] args) {

    // replace with your Java logic here

    int[] arr = {1, 2, 3, 4, 5};

    System.out.println("Array: " + Arrays.toString(arr));

​

    LinkedList<Integer> linkedList = new LinkedList<>();

    linkedList.add(1);

    linkedList.add(2);

    linkedList.add(3);

    linkedList.add(4);

    linkedList.add(5);

    System.out.println("Linked List: " + linkedList);

  }

}