Citigroup Interview Question Java Developers
0of 0 votesWhat is externalizable interface?
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What is externalizable interface?
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By implementing java.io.Serializable, you get "automatic" serialization capability for objects of your class. No need to implement any other logic, it'll just work. The Java runtime will use reflection to figure out how to marshal and unmarshal your objects.
- Hasit Bhatt October 17, 2013In earlier version of Java, reflection was very slow, and so serializing large object graphs (e.g. in client-server RMI applications) was a bit of a performance problem. To handle this situation, the java.io.Externalizable interface was provided, which is like java.io.Serializable but with custom-written mechanisms to perform the marshalling and unmarshalling functions (you need to implement readExternal and writeExternal methods on your class).