An Externalizable
class is one which handles its own Serialization
and deserialization. During deserialization, the first
step in the process is a default instantiation using the class' no-argument constructor. Therefore an Externalizable
class without a
no-arg constructor cannot be deserialized.
public class Tomato implements Externalizable { // Noncompliant; no no-arg constructor public Tomato (String color, int weight) { ... } }
public class Tomato implements Externalizable { public Tomato() { ... } public Tomato (String color, int weight) { ... } }