public   final   class  Method
 extends  AccessibleObject
 implements  Member
A Method provides information about, and access to, a single method on a  class  or  interface . The reflected method may be a  class  method or an instance method (including an  abstract  method). 

A Method permits widening conversions to occur when matching the actual parameters to invokewith the underlying method's formal parameters, but it  throws  an IllegalArgumentException  if  a narrowing conversion would occur. 

getMethod(String name,  Class [] parameterTypes) 
          Returns a Method object that reflects the specified  public  member method of the  class  or  interface  represented by  this   Class  object