Java Description of Figure Example of Provider Subclass（JDK8）

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Description of Figure Example of Provider Subclass

Link to 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.MD5", "com.foo.MD5");
    .
    .
    .
{}

com.foo.MD5.java

package com.foo;
public class MD5 extends
    MessageDigestSpi {
    .
    .
    .
}