how XML manage to execute java class?

how XML manage to execute java class?

References

Reference NO 1

http://stackoverflow.com/questions/15194693/how-xml-manage-to-execute-java-class

Reference NO 2

http://www.java.com/en/download/help/jcp_security.xml

Reference NO 3

http://docs.oracle.com/cd/E12483_01/integrate.1013/b28981/java.htm

Reference NO 4

http://pic.dhe.ibm.com/infocenter/cmgmt/v8r4m0/topic/com.ibm.programmingcm.doc/dcmxs017.htm

Reference NO 5

http://tomcat.apache.org/tomcat-7.0-doc/class-loader-howto.html

Reference NO 6

http://jibx.sourceforge.net/

Reference NO 7

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Reference NO 8

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