package org.wesome.dsalgo;
import lombok.Data;
import java.util.Objects;
public class LinkedList {
static Node head;
static int size = 0;
static void addInLast(int element) {
System.out.println("\nLinkedList.addInLast " + element);
Node newNode = new Node(element);
if (Objects.isNull(head)) {
head = newNode;
return;
}
Node tempNode = head;
while (Objects.nonNull(tempNode.next)) {
tempNode = tempNode.next;
}
tempNode.next = newNode;
size++;
}
static void deleteNode(int position) {
System.out.println("\nLinkedList.deleteNode");
// If linked list is empty
if (Objects.isNull(head)) {
return;
}
Node temp = head;
if (position == 0) {
//if position is 0 , ie head node needs to remove then make next node as head
head = temp.next;
return;
}
// Find previous node of the node to be deleted
for (int i = 0; temp != null && i < position - 2; i++) {
temp = temp.next;
}
// If position is more than number of nodes
if (temp == null || temp.next == null) return;
Node next = temp.next.next;
temp.next = next;
size--;
}
//this method print the list using loop
static void printIteratively() {
System.out.println("\nLinkedList.printIteratively");
if (Objects.isNull(head)) {
System.out.println("Linked List is null = " + head);
return;
}
Node tempNode = head;
System.out.println("Linked List Size is " + size);
while (Objects.nonNull(tempNode)) {
System.out.println("Node = " + tempNode.data);
tempNode = tempNode.next;
}
}
}
@Data
class Node {
int data;
Node next;
public Node(int data) {
this.data = data;
}
}
package org.wesome.dsalgo;
import org.junit.jupiter.api.Test;
import static org.wesome.dsalgo.LinkedList.deleteNode;
import static org.wesome.dsalgo.LinkedList.printIteratively;
public class LinkedListTest {
@Test
void deleteNodeTest() {
addInLast();
deleteNode(2);
printIteratively();
}
void addInLast() {
LinkedList.addInLast(1);
LinkedList.addInLast(2);
LinkedList.addInLast(3);
LinkedList.addInLast(4);
LinkedList.addInLast(5);
}
}
plugins {
id 'java'
id "io.freefair.lombok" version "6.2.0"
}
group = 'org.wesome'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = JavaVersion.VERSION_1_8
configurations {
compileOnly {
extendsFrom annotationProcessor
}
}
repositories {
mavenCentral()
}
dependencies {
testImplementation 'org.junit.jupiter:junit-jupiter:5.6.2'
}
test {
useJUnitPlatform()
}