How to create a list of actions which corresponds to commands in Java

Question

I want to control my server by typing commands in the console, but since it is not modular to write something like

switch(command)
{
  case 'command1':
    command1();
    break;
  /* And so on */
}

in the class Server, how can I create a list of methods bound to functions, that I can easily modify in the future and apply it to other parts of my code ?

create a interface class, derive a bunch of classes for each command with a common method, put them in a Map object, lookup by key, call method. — OldProgrammer, Mar 09 '13 at 21:27

score 4 · Answer 1 · answered Mar 09 '13 at 21:28

4

Map<String, Action> actions = new HashMap<String, Action>();
// TODO populate the map

...

Action action = actions.get(command);
action.execute();

answered Mar 09 '13 at 21:28

JB Nizet

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score 0 · Answer 2 · answered Mar 09 '13 at 21:33

0

I should have looked out for an existing design pattern. Command pattern corresponds to my need.

answered Mar 09 '13 at 21:33

How to create a list of actions which corresponds to commands in Java

2 Answers2