all        turn on all debugging
        ssl        turn on ssl debugging

        The following can be used with ssl:
            record          enable per-record tracing
            handshake       print each handshake message
            keygen          print key generation data
            session         print session activity
            defaultctx      print default SSL initialization
            sslctx          print SSLContext tracing
            sessioncache    print session cache tracing
            keymanager      print key manager tracing
            trustmanager    print trust manager tracing

        handshake debugging can be widened with:
            data            hex dump of each handshake message
            verbose         verbose handshake message printing

        record debugging can be widened with:
            plaintext       hex dump of record plaintext
            packet          print raw SSL/TLS packets

• To view all debugging messages:

      java -Djavax.net.debug=all MyApp

• To view the hexadecimal dumps of each handshake message, you can type the following, where the colons are optional:

      java -Djavax.net.debug=ssl:handshake:data MyApp

• To view the hexadecimal dumps of each handshake message, and to print trust manager tracing, you can type the following, where the commas are optional:

      java -Djavax.net.debug=SSL,handshake,data,trustmanager MyApp