Linked List Delete Node

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()
}

 

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