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Java LinkedList Methods – Full Guide with Syntax, Examples & Best Practices (2025)

Introduction – Why Use Java LinkedList Methods?

Java’s LinkedList is a powerful data structure that combines the benefits of a list and a queue. It allows for fast insertions and deletions, especially at the beginning and middle of the list — and comes with a rich set of methods to make your code flexible and efficient.

By the end of this guide, you’ll understand how to:

• Use all key LinkedList methods
• Perform add, remove, access, and queue operations
• Know when to choose LinkedList over ArrayList

What is a Java LinkedList?

LinkedList is a doubly-linked list implementation of the List, Deque, and Queue interfaces in Java. Unlike ArrayList, it:

• Allows fast insertions/removals from both ends
• Can be used as a stack, queue, or deque
• Is ideal for applications with frequent element shifting

Located in java.util package

import java.util.LinkedList;
LinkedList<String> names = new LinkedList<>();

Common Java LinkedList Methods

Java LinkedList Method Examples

1. add() and add(index, element)

LinkedList<String> list = new LinkedList<>();
list.add("Java");
list.add("Python");
list.add(1, "C++");
System.out.println(list);

Output:

[Java, C++, Python]

Adds elements at end or specified index.

2. addFirst() and addLast()

list.addFirst("Start");
list.addLast("End");
System.out.println(list);

Output:

[Start, Java, C++, Python, End]

Adds elements at both ends.

3. get() and getFirst() / getLast()

System.out.println(list.get(2));       // C++
System.out.println(list.getFirst());   // Start
System.out.println(list.getLast());    // End

Retrieves values from specified positions.

4. remove(), removeFirst(), removeLast()

list.remove("C++");
list.removeFirst();
list.removeLast();
System.out.println(list);

Output:

[Java, Python]

Removes elements by value or position.

5. set(index, value) – Update Value

list.set(1, "Go");
System.out.println(list);

Output:

[Java, Go]

Replaces element at given index.

6. contains() – Check for Element

System.out.println(list.contains("Java"));  // true

Checks existence of a value.

7. size() and clear()

System.out.println(list.size());  // 2
list.clear();
System.out.println(list.isEmpty());  // true

Gets total count and clears list.

8. offer(), poll(), peek() – Queue Operations

LinkedList<String> queue = new LinkedList<>();
queue.offer("A");
queue.offer("B");
System.out.println(queue.poll());  // A
System.out.println(queue.peek());  // B

Queue-like behavior:

• offer() = enqueue
• poll() = dequeue
• peek() = view front

9. push() and pop() – Stack Behavior

LinkedList<String> stack = new LinkedList<>();
stack.push("First");
stack.push("Second");
System.out.println(stack.pop());  // Second

Stack-like LIFO (last-in, first-out) operations.

Summary Table of Methods

Tips for Using LinkedList Methods

• Use addFirst() / removeFirst() for queue operations.
• Use push() / pop() for stack operations.
• Avoid get(index) if random access is frequent — prefer ArrayList for that.
• LinkedList has higher memory usage than ArrayList.

Summary – Java LinkedList Methods

Java LinkedList offers:

• Dual support for List and Queue
• Efficient add/remove from front or end
• Built-in methods for search, queue, stack, and iteration

Mastering these methods enables you to write flexible, performant code for any real-world application.

FAQs on Java LinkedList Methods

Is LinkedList ordered?

Yes. LinkedList maintains insertion order.

Can LinkedList contain duplicates?

Yes, duplicates are allowed.

What’s the difference between LinkedList and ArrayList?

Is LinkedList synchronized?

No. Use Collections.synchronizedList(new LinkedList<>()) for thread safety.

How to convert LinkedList to Array?

String[] arr = list.toArray(new String[0]);