"linkedlist java implementation" Code Answer's
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Linked List implementation
public class LinkedList {
private Node head;
private int length = 0;
public LinkedList() {
this.head = new Node(null);
}
public int size() {
return length;
}
// Adds an element to the end of the list
public void add(Object data) {
Node node = new Node(data);
Node iterator = head;
while (iterator.getNext() != null){
iterator = iterator.getNext();
}
iterator.setNext(node);
length++;
}
// Obtains an element by index
public Object get(int index) {
if (head.getNext() == null || index >= length){
return null;
}
Node iterator = head.getNext();
int counter = 0;
while(counter < index){
iterator = iterator.getNext();
counter++;
}
return iterator.getData();
}
// Returns the index of the element in the list
public int indexOf(Object data) {
Node obj=head;
for (int i = 0; i < length; i++) {
obj = obj.getNext();
if (obj.getData().equals(data)) {
return i;
}
}
return -1;
//throw new Exception("Data not found");
}
// Removes an element from the list
public boolean remove(Object data) {
if (head.getNext() == null){
return false;
}
Node iterator = head;
while(iterator.getNext() != null){
if (iterator.getNext().getData().equals(data)){
iterator.setNext(iterator.getNext().getNext());
length--;
return true;
}
iterator = iterator.getNext();
}
return false;
}
private class Node {
private Object data;
private Node next;
public Node(Object data) {
this.data = data;
next = null;
}
public Object getData() {
return data;
}
public void setData(Object data) {
this.data = data;
}
public Node getNext() {
return next;
}
public void setNext(Node next) {
this.next = next;
}
}
}
how to create a linked list in java
List<Integer> list = new LinkedList<>();
linkedlist in java
LinkedList not synchronized, doubly linked
linked list in java
// Java program to iterate the elements
// in an LinkedList
import java.util.*;
public class GFG {
public static void main(String args[])
{
LinkedList<String> ll
= new LinkedList<>();
ll.add("Geeks");
ll.add("Geeks");
ll.add(1, "For");
// Using the Get method and the
// for loop
for (int i = 0; i < ll.size(); i++) {
System.out.print(ll.get(i) + " ");
}
System.out.println();
// Using the for each loop
for (String str : ll)
System.out.print(str + " ");
}
}
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