Using Java reflection to create eval() method

Question

I have a question about reflection I am trying to have some kind of eval() method. So i can call for example:

eval(\"test(\'woohoo\')\");

Answer 1

You can use getMethods() which returns an array of all methods of a class. Inside the loop you can inspect the parameters of each method.

for(Method m : cl.getMethods()) {
   Class[] params = m.getParameterTypes();
   ...
}

Otherwise you can use getDelcaredMethods() which will allow you to "see" private methods (but not inherited methods). Note that if you want to invoke a private methods you must first apply setAccessible(boolean flag) on it:

for(Method m : cl.getDelcaredMethods()) {
   m.setAccessible(true);
   Class[] params = m.getParameterTypes();
   ...
}