Java LinkedList addLast() Method

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Description

The Java LinkedList addLast(E e) method inserts the specified element E at the end of the linkedList. It maintains the insertion order. When we calls this method multiple times, elements keeps appending to the list in the end of it.

Declaration

Following is the declaration for java.util.LinkedList.addLast() method

public void addLast(E e)

Parameters

e − The element to be added at the end.

Return Value

This method does not return any value.

Exception

NullPointerException − if the specified element is null.

Adding Element to the end of a LinkedList of Integer Example

The following example shows the usage of Java LinkedList addLast(E) method with Integers. We're adding few elements to list using add() method and then using addLast() method, we're adding two elements in the end. Lastly we're printing the LinkedList object to see the final result.

package com.tutorialspoint;

import java.util.LinkedList;

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

      // create an empty linkedList
      LinkedList<Integer> linkedList = new LinkedList<>();

      // use add() method to add elements in the linkedList
      linkedList.add(1);
      linkedList.add(2);
      linkedList.add(3);
      linkedList.add(4);        
      linkedList.add(5);
      linkedList.add(6);

      // the values will be printed in the same order
      linkedList.addLast(7);
      linkedList.addLast(8);

      // let us print all the elements available in linkedList
      System.out.println("LinkedList = " + linkedList);      
   }
}

Output

Let us compile and run the above program, this will produce the following result −

LinkedList = [1, 2, 3, 4, 5, 6, 7, 8]

Adding Element to the end of a LinkedList of String Example

The following example shows the usage of Java LinkedList addLast(E) method with Strings. We're adding few elements to list using add() method and then using addLast() method, we're adding two elements in the end. Lastly we're printing the LinkedList object to see the final result.

package com.tutorialspoint;

import java.util.LinkedList;

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

      // create an empty linkedList
      LinkedList<String> linkedList = new LinkedList<>();

      // use add() method to add elements in the linkedList
      linkedList.add("A");
      linkedList.add("B");
      linkedList.add("C");
      linkedList.add("D");        
      linkedList.add("E");
      linkedList.add("F");

      // the values will be printed in the same order
      linkedList.addLast("G");
      linkedList.addLast("H");

      // let us print all the elements available in linkedList
      System.out.println("LinkedList = " + linkedList);      
   }
}

Output

Let us compile and run the above program, this will produce the following result −

LinkedList = [A, B, C, D, E, F, G, H]

Adding Element to the end of a LinkedList of Object Example

The following example shows the usage of Java LinkedList addLast(E) method with Student objects. We're adding few elements to list using add() method and then using addLast() method, we're adding two elements in the end. Lastly we're printing the LinkedList object to see the final result.

package com.tutorialspoint;

import java.util.LinkedList;

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

      // create an empty linkedList
      LinkedList<Student> linkedList = new LinkedList<>();

      // use add() method to add elements in the linkedList
      linkedList.add(new Student(1, "Julie"));
      linkedList.add(new Student(2, "Robert"));
      linkedList.add(new Student(3, "Adam"));

      // use addLast() method to add element at the end of the linkedList
      linkedList.addLast(new Student(4, "Rohan"));
      linkedList.addLast(new Student(5, "Sohan"));

      // let us print all the elements available in linkedList
      System.out.println("LinkedList = " + linkedList);      
   }
}

class Student {
   int rollNo;
   String name;

   Student(int rollNo, String name){
      this.rollNo = rollNo;
      this.name = name;
   }

   @Override
   public String toString() {
      return "[ " + this.rollNo + ", " + this.name + " ]";
   }
}

Output

Let us compile and run the above program, this will produce the following result −

LinkedList = [[ 1, Julie ], [ 2, Robert ], [ 3, Adam ], [ 4, Rohan ], [ 5, Sohan ]]