Cannot deserialize array in Netscape 4.7

Im trying to deserialize an object that has been assed from servlet to applet with an int[]. When i execute (int[])is.readObject in Netscape (in MSExplorer works fine) the error in java console is:
java.lang.NullPointerException
at java.io.ObjectInputStream.inputArray(Compiled Code)
at java.io.ObjectInputStream.readObject(Compiled Code)
at IICR.web.util.IICRSerializableImage.readObject(Compiled Code)
at java.io.ObjectInputStream.inputObject(Compiled Code)
* at java.io.ObjectInputStream.readObject(Compiled Code)
at IICR.web.util.IICRRotacionImageApplet.obtenerImagen(Compiled Code)
at IICR.web.util.IICRRotacionImageApplet.init(Compiled Code)
at netscape.applet.DerivedAppletFrame$InitAppletEvent.dispatch(Compiled Code)
at java.awt.EventDispatchThread$EventPump.dispatchEvents(Compiled Code)
at java.awt.EventDispatchThread.run(Compiled Code)
at netscape.applet.DerivedAppletFrame$AppletEventDispatchThread.run(Compiled Code)

Hi,
i never did int[].readObject(), so I'm not sure if it works.
what I do normally is the following:
o.writeObject(array.length);
for(int i=0; i<array.length; i++) {
o.writeObject(array;
int size = o.readObject();
String[] array = new String[size];
for(int i=0; i<= size; i++) {
array[i] = (String)o.readObject();
}attention: This code does not care of null arrays

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