import com.list.Node; import com.list.NodeList; public class Main { public stati

Question

import com.list.Node;
import com.list.NodeList;

public class Main {

   public static void main(String[] args) {
      
       NodeList list = new NodeList();
       Node node = new Node(1, "Book");
       Node node2 = new Node(2, "Lappy");
      
       list.add(node);
       list.add(node2);
       list.add(node);
       list.add(node2);
       System.out.println("Length : "+list.size());

       list.remove(node);
       System.out.println("Length : "+list.size());
       list.remove(node2);
      
       Node node3 = new Node(3, "Glass");
       list.remove(node3);
       System.out.println("Length : "+list.size());

   }
}

package com.list;

public class NodeList {

   private int size = 0;
   private Node root = null;;
  
   /*
   * It has to take a new Node and add that to the address og previous Node.
   *
   * @Param - Node
   */
   public void add(Node node) {
      
   }
  
   /*
   * It has to return the size of the NodeList
   *
   * @return size
   */
   public int size() {
       return size;
   }

   /*
   * It has to take a Node and remove that node if you find it in the list
   * from the existing nodes otherwise dont do anything.
   *
   * @Param - Node
   */

   public void remove(Node node) {
   }
}

package com.list;

public class Node {

   private int id = 0;
   private String name = "";
   private Node node;
  
   public Node(int id, String name) {
       this.id = id;
       this.name = name;
       this.node = null;
   }
  
   public Node getNode() {
       return node;
   }

   public void setNode(Node node) {
       this.node = node;
   }

   public int getId() {
       return id;
   }

   public void setId(int id) {
       this.id = id;
   }

   public String getName() {
       return name;
   }

   public void setName(String name) {
       this.name = name;
   }
  
   public String toString() {
       return "ID : "+this.id+" Name : "+this.name;
   }
}

Explanation / Answer

package com.list;

public class Main {
public static void main(String[] args) {
  
NodeList list = new NodeList();
Node node = new Node(1, "Book");
Node node2 = new Node(2, "Lappy");
  
list.add(node);
list.add(node2);
list.add(node);
list.add(node2);
System.out.println("Length : "+list.size());
list.remove(node);
System.out.println("Length : "+list.size());
list.remove(node2);
  
Node node3 = new Node(3, "Glass");
list.remove(node3);
System.out.println("Length : "+list.size());
}
}

package com.list;

public class NodeList {
private int size = 0;
private Node root = null;;
  
/*
* It has to take a new Node and add that to the address og previous Node.
*
* @Param - Node
*/
public void add(Node node) {
node.node = root;
   root = node;
}
  
/*
* It has to return the size of the NodeList
*
* @return size
*/
public int size() {
return size;
}
/*
* It has to take a Node and remove that node if you find it in the list
* from the existing nodes otherwise dont do anything.
*
* @Param - Node
*/
public Node remove(Node node) {
Node temp = node;
   node = node.node;
   return temp;
}
}

package com.list;

public class Node {
private int id = 0;
private String name = "";
Node node;
  
public Node(int id, String name) {
this.id = id;
this.name = name;
this.node= null;
}
  
public Node getNode() {
return node;
}
public void setNode(Node node) {
this.node = node;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
  
public String toString() {
return "ID : "+this.id+" Name : "+this.name;
}
}

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