Problem with reading objects through ObjectInputStream

Question

HI
Actually i have a problem of reading the objects from ObjectInputStream and getting StreamCorruptedException when i try to read as there is no limit to find the end of file i think iam getting the exception any suggestions please to overcome this problem..

Answer 1

Of course I can, I have included two classes.
MyMap that I shall store values in and then save to disk.
Test Map that I stores one value in MyMap and then
serialize to disk and the I do the reverse and se if my value is still there. Check out for yourself and please dont hestate to ask if you have trouble using it.
import java.util.HashMap;
import java.io.Serializable;
* This class must implement Serializable to be stored in disk
* with write(Object)
public class MyMap implements Serializable
  private HashMap map = new HashMap();
  public void put(Serializable key, Serializable value)
    map.put(key,value);
  public Object get(Object key)
    return map.get(key);
// Second class
import java.io.*;
public class TestMap
  public TestMap()
    try
      showHowToUseSerialize();
    catch(Throwable ignored)
      ignored.printStackTrace();
  private void showHowToUseSerialize()throws Throwable
    // First store anything to the class MyMap
    MyMap myMap = new MyMap();
    //  When yuo use put on it it only accept Serializable
    //  se how in the class
    myMap.put("key1","This is the first object in MyMap");
    // Then serialize it to disk.
    serialize(myMap);
    // Now you try to retreive from the file and see if you
    // can get the value key1 stored inside it.
    Object object = deserialize();
    // Cast it to the kind of object you have stored there.
    MyMap mapFromDisk = (MyMap)object;
    // See if key1 is really there.
    String value = (String)mapFromDisk.get("key1");
    // Print it out just be sure...
    System.out.println("key1 stored in MyMap in disk is: "+value);
  private Object deserialize()throws Throwable
    File f = new File("C:\\temp\\mymap.ser");
    if(!f.exists())
    { // Check that there really is such serialized file.
      throw new FileNotFoundException("Didnt find the serialized file: "+f);
    FileInputStream in = new FileInputStream(f);
    ObjectInputStream objIn = new ObjectInputStream(in);
    // Read in the object from the file.
    return objIn.readObject();
  private void serialize(Object myMap) throws Throwable
    File f = new File("C:\\temp\\mymap.ser");
    if(!f.exists())
      f.createNewFile();
    FileOutputStream out = new FileOutputStream(f);
    ObjectOutputStream objOut = new ObjectOutputStream(out);
    objOut.writeObject(myMap);
    objOut.close();
  public static void main(String[] args)
    new TestMap();
}