Grabbing nested variable depending on object name

I have an object formatted like so

public static class ActionTypes {
  private Punch punch;
  private Kick kick;

  public static class Punch {
    private Integer force;
  }
  public static class Kick {
    private Integer force;
  }
}

and given a String parameter like punch or kick, I want to grab its corresponding force. What’s the best way to implement this?

Answer

public static class ActionTypes {
    private final Map<String, Force> map = new HashMap<>();
    
    public void setPunch(Punch punch) {
        map.put("punch", punch)
    }
    
    public void setKick(Kick kick) {
        map.put("kick", kick);
    }
    
    public Force getForce(String id) {
        return map.get(id.toLowerCase());
    }
  
    public static interface Force {
        Integer getForce();
    }       

    public static class Punch implements Punch {
        private Integer force;
        
        public Integer getForce() {
            return force;
        }
    }
    
    public static class Kick implements Punch {
        private Integer force;
        
        public Integer getForce() {
            return force;
        }
    }
    
}