import java.io.FileOutputStream;

import java.io.ObjectOutputStream;

import java.io.Serializable;

import java.util.ArrayList;

import java.util.Collection;

import java.util.HashMap;

import java.util.LinkedList;

import java.util.Map;

import java.util.Queue;

import java.util.concurrent.ConcurrentLinkedQueue;

import org.junit.Test;

class CollectionsSerializableBean implements Serializable {

// Collections

public Collection<String> arrayList;

public Collection<String> linkedList;

public Map<String, Object> hashMap;

public Queue<String> queue;

public CollectionsSerializableBean()

{

super();

arrayList = new ArrayList<String>();

arrayList.add("e1");

arrayList.add("e2");

linkedList = new LinkedList<String>();

linkedList.add("ll1");

linkedList.add("ll2");

hashMap = new HashMap<String, Object>();

hashMap.put("k1", null);

hashMap.put("k2", "value2");

hashMap.put("k3", arrayList);

hashMap.put("k3", linkedList);

queue = new ConcurrentLinkedQueue<String>();

queue.add("q1");

queue.add("q2");

queue.add("q3");

}

}

public class CollectionsTest {

ObjectOutputStream oos;

FileOutputStream fos;

@Test

public void testCollections() throws Exception {

oos = new ObjectOutputStream(fos = new FileOutputStream("objCollections.ser"));

oos.writeObject(new CollectionsSerializableBean());

oos.flush();

}

}