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

You could use the Strategy design pattern and a mapping from the string you have to the corresponding concrete strategy object. This is the safe and efficient means.

So, have a HashMap look-up.

E.g., something along the lines of:

final static YourType reciever = this;
HashMap m = new HashMap {{
    put("a", new Runnable() {
       @Override public void run () {
         reciever.a();
       }
    });
    ....
}};
// but check for range validity, etc.
m.get("a").run()

You could also use reflection or "invert" the problem and use polymorphism