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Q:

java linked list

import java.io.*; 
  
// Java program to implement 
// a Singly Linked List 
public class LinkedList { 
  
    Node head; // head of list 
  
    // Linked list Node. 
    // This inner class is made static 
    // so that main() can access it 
    static class Node { 
  
        int data; 
        Node next; 
  
        // Constructor 
        Node(int d) 
        { 
            data = d; 
            next = null; 
        } 
    } 
  
    // Method to insert a new node 
    public static LinkedList insert(LinkedList list, int data) 
    { 
        // Create a new node with given data 
        Node new_node = new Node(data); 
        new_node.next = null; 
  
        // If the Linked List is empty, 
        // then make the new node as head 
        if (list.head == null) { 
            list.head = new_node; 
        } 
        else { 
            // Else traverse till the last node 
            // and insert the new_node there 
            Node last = list.head; 
            while (last.next != null) { 
                last = last.next; 
            } 
  
            // Insert the new_node at last node 
            last.next = new_node; 
        } 
  
        // Return the list by head 
        return list; 
    } 
  
    // Method to print the LinkedList. 
    public static void printList(LinkedList list) 
    { 
        Node currNode = list.head; 
   
        System.out.print("LinkedList: "); 
   
        // Traverse through the LinkedList 
        while (currNode != null) { 
            // Print the data at current node 
            System.out.print(currNode.data + " "); 
   
            // Go to next node 
            currNode = currNode.next; 
        } 
    } 
   
    // Driver code 
    public static void main(String[] args) 
    { 
        /* Start with the empty list. */
        LinkedList list = new LinkedList(); 
  
        // 
        // ******INSERTION****** 
        // 
  
        // Insert the values 
        list = insert(list, 1); 
        list = insert(list, 2); 
        list = insert(list, 3); 
        list = insert(list, 4); 
        list = insert(list, 5); 
        list = insert(list, 6); 
        list = insert(list, 7); 
        list = insert(list, 8); 
  
        // Print the LinkedList 
        printList(list); 
    } 
} 
3
import java.util.LinkedHashSet;
public class LinkedHashsetExample
{
   public static void main(String[] args)
   {
      LinkedHashSet<String> lhs = new LinkedHashSet<String>();
      // add elements to LinkedHashSet
      lhs.add("Anteater");
      lhs.add("Bear");
      lhs.add("Cheetah");
      lhs.add("Deer");
      // will not add new element as Anteater already exists
      lhs.add("Anteater");
      lhs.add("Elephant");
      System.out.println("LinkedHashSet size: " + lhs.size());
      System.out.println("Given LinkedHashSet: " + lhs);
      System.out.println("Deer removed from LinkedHashSet: " + lhs.remove("Deer"));
      System.out.println("Remove Zebra which is not present: " + lhs.remove("Zebra"));
      System.out.println("Check if Anteater is present: " + lhs.contains("Anteater"));
      System.out.println("New LinkedHashSet: " + lhs);
   }
}
1
import java.util.LinkedList;
LinkedList<Integer> myList = new LinkedList<Integer>();
myList.add(0);
myList.remove(0);//Remove at index 0
myList.size();
myList.get(0);//Return element at index 0
6
 LinkedList<String> list=new LinkedList<String>();
2
LinkedList<String> linked_list = new LinkedList<>();
1
// 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 + " ");  
    }  
}  
0

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