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LinkedList
Last Updated : 26 May, 2026
title: LinkedList in Java
Collections Framework85 words4 headingsTables includedExamples included
title: LinkedList in Java description: LinkedList - doubly linked list implementation
Doubly linked list. List aur Deque dono implement karta hai.
Create karna
java exampleWoHoTech
LinkedList<String> ll = new LinkedList<>();Basic Operations
java exampleWoHoTech
LinkedList<Integer> ll = new LinkedList<>();
// Add
ll.add(10);
ll.add(20);
ll.addFirst(5); // Start mein add
ll.addLast(30); // End mein add
// Access
ll.getFirst(); // 5
ll.getLast(); // 30
ll.get(1); // By index (slow)
ll.peek(); // First element (null if empty)
// Remove
ll.removeFirst(); // First remove
ll.removeLast(); // Last remove
ll.remove(1); // By index
ll.poll(); // First remove (null if empty)
// Queue operations
ll.offer(40); // Add to end
ll.poll(); // Remove from front
// Stack operations
ll.push(50); // Add to front
ll.pop(); // Remove from frontArrayList vs LinkedList
| Operation | ArrayList | LinkedList |
|---|---|---|
| get(index) | O(1) | O(n) |
| add at end | O(1) amortized | O(1) |
| add at middle | O(n) | O(1) (pointer change) |
| remove from middle | O(n) | O(1) (pointer change) |
| Memory | Less | More (node overhead) |
Kab Use Karein?
- Frequent insert/delete at beginning/middle → LinkedList
- Random access, read heavy → ArrayList
Exam Focus
Revise definitions, diagrams, examples, and short-answer points for LinkedList.
Interview Use
Prepare one clear explanation, one practical example, and one common mistake for this Java topic.
Search Terms
java, java programming, core java, java master course, java notes, master, course, collections
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