Interface Example -- Implementing Storable

• A class may implement an interface, in which case it provides the body for the methods specified in the interface.

• interface storable has store and retrieve methods

  • public class Picture implements Storable {
    • public void store(Stream s) {
    • // JPEG compress image before storing
    • }
    • public void retrieve(Stream s) {
    • // JPEG decompress image before retrieving
    • }
    • }
  • public class StudentRecord implements Storable {
    • . . .
    • }

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