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# Interface java.io.Externalizable

public interface Externalizable
extends Serializable

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readExternal(ObjectInput)
  The object implements the readExternal method to restore its contents by calling the methods of DataInput for primitive types and readObject for objects, strings and arrays.
writeExternal(ObjectOutput)
  The object implements the writeExternal method to save its contents by calling the methods of DataOutput for its primitive values or calling the writeObject method of ObjectOutput for objects, strings and arrays.

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writeExternal

      public abstract void writeExternal(ObjectOutput out) throws IOException

  The object implements the writeExternal method to save its contents by calling the methods of DataOutput for its primitive values or calling the writeObject method of ObjectOutput for objects, strings and arrays.

readExternal

      public abstract void readExternal(ObjectInput in) throws IOException, ClassNotFoundException

  The object implements the readExternal method to restore its contents by calling the methods of DataInput for primitive types and readObject for objects, strings and arrays. The readExternal method must read the values in the same sequence and with the same types as were written by writeExternal.

  Throws: ClassNotFoundException
    If the class for an object being restored cannot be found.

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