Java Program to Access elements from a LinkedList.

Example 1: Access elements from a linkedlist

 import java.util.LinkedList; class Main { public static void main(String[] args) { LinkedList<String> languages = new LinkedList<>(); // add elements in the LinkedList languages.add("Python"); languages.add("Java"); languages.add("JavaScript"); System.out.println("LinkedList: " + languages); // get the element from the LinkedList String str = languages.get(1); System.out.print("Element at index 1: " + str); } }

Output

 LinkedList: [Python, Java, JavaScript] Element at index 1: Java

In the above example, we have used the get() method with parameter 1. Here, the method returns the element at index 1.

Example 2: Using iterator() method

We can also use the iterator() method to iterate over the elements of a linkedlist. We must import java.util.Iterator package to use this method. For example,

 import java.util.LinkedList; import java.util.Iterator; class Main { public static void main(String[] args) { LinkedList<String> animals= new LinkedList<>(); // Add elements in LinkedList animals.add("Dog"); animals.add("Horse"); animals.add("Cat"); // Creating an object of Iterator Iterator<String> iterate = animals.iterator(); System.out.print("LinkedList: "); while(iterate.hasNext()) { System.out.print(iterate.next()); System.out.print(", "); } } }

Output

 LinkedList: Dog, Cat, Horse,

Here,

• hasNext() - returns true if there is a next element
• next() - returns the next element

To learn more about Iterator, visit the Java Iterator Interface.

Example 3: Using listIterator() method

We can also use the listIterator() method to iterate over the elements of a LinkedList. To use this method, we must import java.util.ListIterator package.

 import java.util.LinkedList; import java.util.ListIterator; class Main { public static void main(String[] args) { LinkedList<String> animals= new LinkedList<>(); // Add elements in LinkedList animals.add("Dog"); animals.add("Horse"); animals.add("Cat"); // Create an object of ListIterator ListIterator<String> listIterate = animals.listIterator(); System.out.print("LinkedList: "); while(listIterate.hasNext()) { System.out.print(listIterate.next()); System.out.print(", "); } // Iterate backward System.out.print("\nReverse LinkedList: "); while(listIterate.hasPrevious()) { System.out.print(listIterate.previous()); System.out.print(", "); } } }

Output

 LinkedList: Dog, Horse, Cat, Reverse LinkedList: Cat, Horse, Dog,

Here,

• hasNext() - returns true if there is a next element
• next() - returns the next element
• hasPrevious() - returns true if there exist previous elements
• previous() - returns the previous element

To learn more about ListIterator, visit Java ListIterator Interface.

Note: The listIterator() method is more preferred than iterator(). This is because it allows you to iterate backward as well.