how to call a java method using a variable name?

Question

Say I have Method1(void), Method2(void)...

Is there a way i can chose one of those with a variable?

 String MyVar=2;
 MethodMyVar();

Answer 1

Use reflection:

Method method = WhateverYourClassIs.class.getDeclaredMethod("Method" + MyVar); method.invoke(); 

Answer 2

Only through reflection. See the java.lang.reflect package.

You could try something like:

Method m = obj.getClass().getMethod("methodName" + MyVar);
m.invoke(obj);

Your code may be different if the method has parameters and there's all sorts of exception handling missing.

But ask your self if this is really necessary? Can something be changed about your design to avoid this. Reflection code is difficult to understand and is slower than just calling obj.someMethod().

Good luck. Happy Coding.