Description of Figure Example of Provider Subclass

This figure consists of a cylinder labeled Provider C and a box. Dotted lines are used to indicate that Provider C contains the contents of the box. The box contains the following headers and Java code:

• provider.java

  public class fooJCA extends Provider {
      .
      .
      .
      put("MessageDigest.SHA-256", "com.foo.SHA256");
      .
      .
      .
  {}

• com.foo.SHA256.java

  package com.foo;
  public class SHA256 extends
  MessageDigestSpi {
     .
     .
     .
  }