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"If a singleton contains a nontransient object reference field, the contents of this field will be deserialized before the singletonâ���������€š�š�š�š����������€š�š�š�z�s singletonâ����������‚�š�š�š�š�����������‚�š�š�š�z�s readResolve method is run. This allows a carefully crafted stream to 'steal' a reference to the originally deserialized singleton at the time the contents of the object reference field are deserialized" [Bloch 2008].
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