I can't read a Object from file, Please help me

Question

i want to write a Object into File. this is code of Object
class objStoreCus implements Comparable, Serializable
String customerID = new String();
String customerName = new String();
String customerEmail = new String();
objStoreCus(String cusID, String cusName, String cusEmail)
customerID = cusID;
customerName = cusName;
customerEmail = cusEmail;
objStoreCus(){}
public int compareTo(Object o)
objStoreCus oS = new objStoreCus();
oS = (objStoreCus)o;
return(customerEmail.compareTo(oS.customerEmail));
private void writeObject(ObjectOutputStream s) throws IOException {
s.defaultWriteObject();
private void readObject(ObjectInputStream s) throws IOException, ClassNotFoundException {
try
s.defaultReadObject();
}catch(IOException ie){throw new IOException();}
catch(ClassNotFoundException cnt){throw new ClassNotFoundException();}
And I was wrote above Object into File by this code :+
FileOutputStream fos;
ObjectOutputStream oos;
FileInputStream fis;
ObjectInputStream ois;
public void writeObjToFile(objStoreCus obj)
try
fos = new FileOutputStream("Exrcise3.ex3", true);
}catch(FileNotFoundException fnfe){}
try
oos = new ObjectOutputStream(fos);
//ghi doi tuong vao file
oos.writeObject(obj);
//dong stream
oos.close();
fos.close();
}catch(IOException ie){}
But i can't read above Object from file. allway have a Exception occur "StreamCorruptedException".
this is code read Object form file :
*parameter is ArrayList will be store Object from file.
public void readObjFromFile(ArrayList al)
try
fis = new FileInputStream("Exrcise3.ex3");
}catch(FileNotFoundException fnfe){}
try
ois = new ObjectInputStream(fis);
while(true)
try
objStoreCus osc = new objStoreCus();
osc = (objStoreCus)ois.readObject();
System.out.println(osc.customerEmail);
}catch(Exception e)
e.printStackTrace();
//System.out.println();
break;
ois.close();
fis.close();
}catch(IOException ie){}
}

Answer 1

Problem lies in
os = new FileOutputStream("Exrcise3.ex3", true);
You are trying to append to that file, You should always use new file to serialize objects.
os = new FileOutputStream("Exrcise3.ex3");
Try with above line.