Java - Insert in List

As we have seen the implementations of a List are :

ArrayList
LinkedList

Let us see the ArrayList implementation first.

How to insert a new Items in ArrayList?

Let us say, we have a List that would contain three names, Mohan, Kriti and Salim.

We can use the add() Method to achieve the above.

Example :

import java.util.ArrayList;
import java.util.List;

public class MyApplication {
    public static void main(String[] args) {

        List x = new ArrayList<>();

        x.add("Mohan");
        x.add("Kriti");
        x.add("Salim");
        
        for (String data : x) {
            System.out.println(data);
        }
    }
}

Output :

Mohan
Kriti
Salim

So, in the above code we have created an empty ArrayList.

List x = new ArrayList<>();

Next, we have used the add() method to add the names, Mohan, Kriti and Salim to the ArrayList.

x.add("Mohan");
x.add("Kriti");
x.add("Salim");

Below is how the values are positioned in the List,

Then we are using the for each loop to print the above names on the screen.

for (String data : x) {
	System.out.println(data);
}

And we get the below output,

Output :

Mohan
Kriti
Salim

Now, let us see the implementation using LinkedList. It is exactly similar to ArrayList.

How to insert a new Items in LinkedList?

Just like the above, let us say, we have a List that would contain three names, Mohan, Kriti and Salim.

We can use the add() Method to achieve the above.

Example :

import java.util.LinkedList;
import java.util.List;

public class MyApplication {
    public static void main(String[] args) {

        List x = new LinkedList<>();

        x.add("Mohan");
        x.add("Kriti");
        x.add("Salim");

        for (String data : x) {
            System.out.println(data);
        }
    }
}

Output :

Mohan
Kriti
Salim

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