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How to create and add elements to a LinkedList in Kotlin

How to create and add elements to a LinkedList in Kotlin.

Here's a step-by-step tutorial on how to create and add elements to a LinkedList in Kotlin:

Step 1: Import the LinkedList class​

The first step is to import the LinkedList class from the Kotlin standard library. You can do this by adding the following import statement at the top of your Kotlin file:

import java.util.LinkedList

Step 2: Create a LinkedList object​

To create a new LinkedList object, you can simply call the constructor of the LinkedList class:

val linkedList = LinkedList<String>()

In this example, we are creating a LinkedList of type String. You can replace String with any other data type that you want to store in the LinkedList.

Step 3: Add elements to the LinkedList​

To add elements to the LinkedList, you can use the add method. There are several variations of the add method that you can use, depending on how you want to add the elements.

3.1. Add elements at the end of the LinkedList To add elements at the end of the LinkedList, you can use the add method without specifying an index:

linkedList.add("Element 1")
linkedList.add("Element 2")
linkedList.add("Element 3")

In this example, we are adding three elements to the LinkedList: "Element 1", "Element 2", and "Element 3". The elements will be added in the order they are specified.

3.2. Add elements at a specific index in the LinkedList To add elements at a specific index in the LinkedList, you can use the add method and specify the index as the first argument:

linkedList.add(0, "Element A")
linkedList.add(2, "Element B")

In this example, we are adding two elements to the LinkedList at index 0 and index 2. The existing elements will be shifted to the right to make room for the new elements.

Step 4: Access elements in the LinkedList​

To access elements in the LinkedList, you can use the indexing operator []:

val element1 = linkedList[0]
val element2 = linkedList[1]

In this example, we are accessing the elements at index 0 and index 1 in the LinkedList.

Step 5: Print the elements in the LinkedList​

To print the elements in the LinkedList, you can use a loop to iterate over the elements and print each element:

for (element in linkedList) {
    println(element)
}

In this example, we are using a for loop to iterate over each element in the LinkedList and print it.

That's it! You have now learned how to create a LinkedList object, add elements to it, access elements in it, and print the elements. You can use these concepts to work with LinkedLists in your Kotlin programs.