LinkedList speichern

import java.util.LinkedList;
import java.io.IOException; 
import java.io.ObjectOutputStream;
import java.io.ObjectInputStream;
import java.io.FileOutputStream;
import java.io.FileInputStream;

class LinkListSerializer{

        public static void serializeListToFile(LinkedList<Integer> list, String file){

                try{
                        ObjectOutputStream os = new ObjectOutputStream(new FileOutputStream(file));
                        os.writeObject(list);
                        os.close();
                }
                catch(IOException e){ 
                        System.out.println("IOException occured :(");
                        e.printStackTrace();
                }
        }

        public static LinkedList<Integer> deserializeListFromFile(String file){
                
                LinkedList<Integer> ret = null;
                try{ 
                        ObjectInputStream is = new ObjectInputStream(new FileInputStream(file));
                        ret = (LinkedList<Integer>)(is.readObject());
                        is.close();
                }
                catch(Exception e){
                        System.out.println("IOException occured :(");
                        e.printStackTrace();    
                }
                return ret;
                
        }
                
        public static void main(String[] args){ 

                String file = "linkedlist.obj";
                LinkedList<Integer> out_list = new LinkedList<Integer>();
                out_list.add(3);
                out_list.add(5);
                out_list.add(1);
                serializeListToFile(out_list, file);
                LinkedList<Integer> in_list = deserializeListFromFile(file);
                
                while(!in_list.isEmpty()){

                        System.out.print(in_list.poll() + "-> ");
                }
                System.out.println("null");
                
        }
}

/*
 * Created on 10.01.2005@12:18:22
 *
 * TODO Explain me...
 */
package de.tutorials;

import java.beans.XMLDecoder;
import java.beans.XMLEncoder;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.util.LinkedList;
import java.util.List;

/**
 * @author Darimont
 *
 * TODO Comment me
 */
public class XMLSerializerTest {

    public static void main(String[] args) {
        new XMLSerializerTest().doIt();
    }

    /**
     * 
     */
    private void doIt() {
        List list = new LinkedList();
        list.add("AAA");
        list.add("BBB");
        list.add(new Foo());

        try {
            File file = new File("c:/myLinkedList.xml");
            XMLEncoder encoder = new XMLEncoder(new FileOutputStream(file));
            encoder.writeObject(list);
            encoder.flush();
            encoder.close();

            XMLDecoder decoder = new XMLDecoder(new FileInputStream(file));
            List lst = (List) decoder.readObject();
            System.out.println(lst);

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }
}

/*
 * Created on 10.01.2005@12:24:28
 *
 * TODO Explain me...
 */
package de.tutorials;

public class Foo {
    int a = 10;

    int b = 5;

    public Foo() {

    }

    public String toString() {
        // TODO Auto-generated method stub
        return a + ":" + 5;
    }
}

<?xml version="1.0" encoding="UTF-8"?> 
<java version="1.5.0" class="java.beans.XMLDecoder"> 
 <object class="java.util.LinkedList"> 
  <void method="add"> 
   <string>AAA</string> 
  </void> 
  <void method="add"> 
   <string>BBB</string> 
  </void> 
  <void method="add"> 
   <object class="de.tutorials.Foo"/> 
  </void> 
 </object> 
</java>