Java Linked List

[nomss]

So I need help with my paste method here. Each time it is called, new Node should be created and be inserted to the left of current. Thank You!

import java.util.Scanner;
public class List
{
  private Node head;
  private Node last;
  private Node current;
  private Node copy;
  private Scanner so = new Scanner(System.in);
  private int total;
  
  public List()
  {
    head = null;
    last = null;
    current = null;
    copy = null;
    total = 0;
  }
  
  // adds int to the lined list
  public void addNum(int n)
  {
    if(head == null)
    {
      head = new Node(n);
    }
    else
    {
      Node temp = head;
      while(temp.getNext() != null)
      {
        temp = temp.getNext();
      }
      temp.setNext(new Node(n));
    }
    toString();
  }
  
  
  // requests user inputs
  public void command()
  {
    String s = "";
    boolean running = true;
    current = head;
    while(running)
    {
      System.out.println("Command: home forward copy paste cut done ?");
      s = so.nextLine();
      if(s.toLowerCase().equals("home"))
      {
        home();
      }
      else if(s.toLowerCase().equals("forward"))
      {
        forward();
      }
      else if(s.toLowerCase().equals("copy"))
      {
        copy();
      }
      else if(s.toLowerCase().equals("paste"))
      {
        paste();
      }
      else if(s.toLowerCase().equals("cut"))
      {
        cut();
      }
      else if(s.toLowerCase().equals("done"))
      {
        running = false;
      }
      else
      {
        System.out.println("Command not recognized, please type a command from above");
      }
      toString();
    }
  }
  // Copies the current node
  public void copy()
  {
    if(head == null)
    {
      return;
    }
    else
    {
      copy = current;
    }
  }
  
  // pastes the copied node
  public void paste()
  {
    if(current == null || head == null)
    {
      System.out.println("1");
      return;
    }
    else
    {
      if(current == last)
      {
        Node temp = new Node(current.getNum());
        System.out.println("test 1");
        last.setNext(temp);
        temp.setNext(null);
        last = temp;
      }
    }
  }
  
  // returns last node
  public Node last()
  {
    if(head == null)
    {
      return null;
    }
    else
    {
      Node temp = head;
      while(temp != null)
      {
        last = temp;
        temp = temp.getNext();
      }
      System.out.println("Last: " + last.getNum());
      return last;
    }
  }
  
  // returns first node
  public Node home()
  {
    if(head == null)
    {
      return null;
    }
    else
    {
      return head;
    }
  }
  
  // deletes first node
  public void deleteHead() 
  {
    if (head == null)
      return;
    else
    {
      if (head == last)
      {
        head = null;
        last = null;
      }
      else
      {
        head = head.getNext();
        current = head;
      }
    }
  }
  
  // deletes last node
  public void deleteLast()
  {
    if(last == null)
    {
      return;
    }
    else
    {
      Node temp = head.getNext();
      Node previous = head;
      while (temp != last)
      {
        previous = previous.getNext();
        temp = temp.getNext();
      }
      last = previous;
      last.setNext(null);
      current = last;
    }
  }
  
  // cuts the current node
  public void cut()
  {
    if(home() == null)
    {
      return;   
    }
    else if(current == home())
    {
      deleteHead();
    }
    else if(current != last())
    {
      Node temp = home().getNext();
      Node previous = home();
      while(temp != current)
      {
        previous = previous.getNext();
        temp = temp.getNext();
      }
      previous.setNext(temp.getNext());
      copy = current;
      current = current.getNext();
    }
    else if(current == last)
    {
      deleteLast();
    }
  }
  
  // moves the current to the next node
  public void forward()
  {
    if(current == last)
    {
      System.out.println("Can not move any further");
      return;
    }
    else if(head == null)
    {
      return;
    }
    else if(current == null)
    {
      current = home();
    }
    else
    {
      current = current.getNext();
      System.out.println(current.getNum());
    }
  }
  
  // prints the data in linked list
  public String toString()
  {
    String s = "";
    Node temp = head;
    while(temp != null)
    {
      s = s + " " + temp.getNum();
      temp = temp.getNext();
    }
    System.out.println(s);
    return s;
  }
  
  public static void main(String[] args)
  {
    List gl = new List();
    gl.addNum(1);
    gl.addNum(2);
    gl.addNum(3);
    //gl.addNum(4);
    //gl.addNum(5);
    //gl.addNum(6);
    gl.command();
    //gl.toString();
  } 
}

public class Node
{
private int num;
private Node next;

public Node(int n)
{
num = n;
next = null;
}

public int getNum()
{
return num;
}

public void setNum(int n)
{
num = n;
}

public Node getNext()
{
return next;
}

public void setNext(Node n)
{
next = n;
}
}