Question

1670 * 168 * Returns an array of the words in the list, in the order that the client * would expect. * * 169 170 171 172 * * @return an array of all the words in the list * 1730 174 public String[] toArray() { return null; private class Node { private String data; private Node next; 175 176 1770 178 179 180 181 1820 183 184 185 186 187 // Constructs a new node with the specified data private Node(String data) { this.data = data; this.next = null; }
If i have a node list type string, how do i put the data from each node into a string array and print the results? I am creating the node list myself so i just need generic code how to print the data from each node into a String array.

Answer 1

Answer:

I have run a sample program for you in which I have kept the function as static and the function is returning a string array containing the data from the nodes list.

import java.util.ArrayList;
import java.util.List;

class Node
{
String data;
Node next;
  
Node(String data)
{
this.data = data;
this.next = null;
}
}

public class Main
{
public static String[] toArray(List<Node> l)
{
String res[] = new String[l.size()];
  
for(int i=0; i<l.size(); i++)
{
res[i] = l.get(i).data;
}
  
return res;
}
   public static void main(String[] args) {
       Node a = new Node("hi");
       Node b = new Node("hello");
      
       List<Node> l = new ArrayList<Node>();
       l.add(a);
       l.add(b);
      
       String res[] = toArray(l);
      
       for(int i=0; i<res.length; i++)
       {
       System.out.println(res[i]);
       }
      
      
   }
}
Output:

hello Program finished with exit code 0 Press ENTER to exit console.

For the function to be used inside the class, just remove the static keyword and the argument as the list will be directly accessible. The generic function will be like this (Assuming the list of nodes is l) :

public String[] toArray()
{
String res[] = new String[l.size()];
  
for(int i=0; i<l.size(); i++)
{
res[i] = l.get(i).data;
}
  
return res;
}