Question

In java write a method that will take an array and change it into a linkedlist and then display it in the main method

Answer 1

If you have any problem with the code feel free to comment.

Program

class LinkedList {
        // head node
        private Node head;

        // inner node class
        private class Node {
                int data;
                Node next;

                Node(int data) {
                        this.data = data;
                }
        }

        // method to convert array to linkedlist
        public void arrayToLinkedList(int[] data) {
                // head node points to first element
                head = new Node(data[0]);
                Node last = head;
                // looping through the array
                for (int i = 1; i < data.length; i++) {
                        // looping through the list
                        while (last.next != null)
                                last = last.next;
                        // adding element at the end
                        last.next = new Node(data[i]);
                }

        }

        // for printing the linkedlist
        public void printList() {
                Node currentNode = head;
                while (currentNode != null) {
                        System.out.print(currentNode.data + " ");
                        currentNode = currentNode.next;
                }
        }
}

public class Test {
        public static void main(String[] args) {
                // testing the method
                int[] ar = { 5, 9, 3, 7, 2 };
                LinkedList llist = new LinkedList();
                llist.arrayToLinkedList(ar);
                llist.printList();
        }
}

Output