import java.io.*;

public class WriteReadList {
    Node listRoot = new Node("root");

    public WriteReadList() {

	/* Create the list. */
	Node next, last = listRoot;
	for (int i=0; i<10; i++) {
	    next = new Node("node no " + i);
	    last.setNext(next);
	    last = next;
	}

    }

    public static void main(String[] args) {
	WriteReadList wrl = new WriteReadList();
	
	System.out.println("before saving:");
	wrl.printList();

	/* Stream the list to file. */
	try {
	    ObjectOutputStream oos = 
		new ObjectOutputStream(new FileOutputStream("list.ser"));	
	    oos.writeObject(wrl.listRoot);
	} catch (Exception e) {
	    e.printStackTrace();
	}

	wrl.listRoot = null;
	System.out.println("after saving, before reading:");
	wrl.printList();

	try {
	    ObjectInputStream ois = 
		new ObjectInputStream(new FileInputStream("list.ser"));
	    wrl.listRoot = (Node)ois.readObject();
	} catch (Exception e) {
	    e.printStackTrace();
	}
	System.out.println("after reading:");
	wrl.printList();

    }

    private void printList() {
	
	for (Node n=listRoot; n != null; n = n.getNext()) {
	    System.out.println(n);
	}
	System.out.println();

    }
    
    public static class Node implements Serializable {
	private String info;
	private Node next;
	
	public Node(String s) {
	    info = s;
	}
	
	public Node getNext() {
	    return next;
	}
	
	public void setNext(Node n) {
	    next = n;
	}
	
	public String toString() {
	    return info;
	}

    } //inner class Node

} //class WriteReadList