I got my Answer. TransformerFactory has a plug-ability layer. JAXP provides a common Java interface that allows flexibilty to add various implementations of the supported standards XSLT processors.
TransformerFactory tFactory = TransformerFactory.newInstance();
This had look-up procedure to locate XSLT processors.AS we does not defined any,it will take available or default.
Now, I am adding SAXON XSLT processor . I have added it's .jar file in my project and just added
TransformerFactory tFactory = TransformerFactory.newInstance("net.sf.saxon.TransformerFactoryImpl",null);
That's it. now it will use Saxon XSLT processor