Calling functions dynamically

Question

how can i retrieve a Method object using the Class method
getMethod(String name, Class[] parameterTypes)[\code]if the method i'm trying to retrieve has primitive parameters (i.e. they cannot be inserted into an array of type Class).  for instance, i want to get the method setCharacterAttribute(int offset, int length, AttributeSet s, boolean change) dynamically.
thanks!                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

Answer 1

Lets reformat that so it is readable
how can i retrieve a Method object using the Class
method
getMethod(String name, Class[] parameterTypes)if the method i'm trying to
retrieve has primitive parameters (i.e. they cannot be
inserted into an array of type Class). for instance,
i want to get the method setCharacterAttribute(int
offset, int length, AttributeSet s, boolean change)
dynamically.
thanks!You can specify the Wrapper classes for primitive types. So in your example
Class[] params = { Integer.class, Integer.class, AttributeSet.class, Boolean.class };
Method m = classRef.getMethod("setCharacterAttribute", params);To invoke this method on a specific instance of the class the method belongs to you do the following
Object[] paramValues = {new Integer(offset), new Integer(length), s, new Boolean(change) };
m.invoke(instance, paramValues);where instance is a reference to an instance of the class you wish to call, s in the paramValues array is the actual AttributeSet instance.
Go look for Java Tutorials that deal with Reflection and Introspection on the java.sun site.