Method code depending on value of Instance?

Question

I have a question for Android (Java).

Lets say i have a list of commands (each one with command name, and execute method).
The execute method has different code depending on the command name (i.e. Command "GET GPS LOCATION" -> execute Method returns Location value).

So, I could use a single Command class with a switch-case in the execute method checking the name of the command and executing the code.
Or make a class for every command (which is not the best way i guess, because i have 80+ commands).
Or should i use an interface?
Or is there a better way at all?

Thanks for your help!

Answer 1

Since Java8, you can use method references to do this in a concise way :

public class Test {

  Map<String, Runnable> map = Maps.newHashMap();
  map.put("foo", Test::foo);
  map.put("bar", Test::bar);

  public static void foo() {

  }


  public static void bar() {

  }
}

Then, calling map.get(methodName).run() is enough.