Please help to understand cause of problem with serialization.
I have following Target class declaration:
class Line implements Serializable {
int index;
public Line() {
System.out.println("Constructing empty line");
}
Line( int index) {
System.out.println("Constructing line: " + index);
this.index = index;
}
//get and set
public void printInfo() {
System.out.println("Line: " + index);
System.out.println(" Object reference: " + super.toString());
}
}
and following main:
...
FileOutputStream os = new FileOutputStream(fileName);
ObjectOutputStream oos = new ObjectOutputStream(os);
oos.writeObject(line1);
oos.close();
System.out.println("Read objects:");
FileInputStream is = new FileInputStream(fileName);
ObjectInputStream ois = new ObjectInputStream(is);
Line line = (Line) ois.readObject();
line.printInfo();
ois.close();
...
this code works good but if I add to target class following methods:
private void writeObject(ObjectOutputStream oos) throws IOException {
// default serialization
System.out.println("custom serialization!!!!");
oos.defaultWriteObject();
}
private void readObject(ObjectInputStream objectInputStream) throws
IOException, ClassNotFoundException {
System.out.println("custom Deserialization!!!!");
objectInputStream.readObject();
}
I see:
java.io.StreamCorruptedException: invalid type code: 00
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1355)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
at io_nio.Line.readObject(SerializationWithReferencesToComplicatedObjects.java:164)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
...
What the cause of the problem?
