Thread: [Asking] Store method in HashMap

Hi everyone,

I got trouble about storing method in HashMap. I got the example but there is no parameter in method, You can see the code below

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
 
/**
 *
 * @author user
 */
public class PracticeMap {
    public static void main(String[] args) {
         Map<String, Method> methodMap = new HashMap<String, Method>();
        try {
            methodMap.put("help", PracticeMap.class.getMethod("showHelp"));
            methodMap.get("help").invoke(null);
 
        } catch (NoSuchMethodException ex) {
            Logger.getLogger(PracticeMap.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SecurityException ex) {
            Logger.getLogger(PracticeMap.class.getName()).log(Level.SEVERE, null, ex);
        }catch (IllegalAccessException ex) {
            Logger.getLogger(PracticeMap.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IllegalArgumentException ex) {
            Logger.getLogger(PracticeMap.class.getName()).log(Level.SEVERE, null, ex);
        } catch (InvocationTargetException ex) {
            Logger.getLogger(PracticeMap.class.getName()).log(Level.SEVERE, null, ex);
        }
 
    }
 
    public static void showHelp() {
        System.out.println("Help me!!");
    }
}

I want to put parameter in showHelp method. But I don't how to that.

Please share me information if you already know

Hi norm,
Yes, I use it
The code will print Help me!!
But it's difficult to use param on showHelp method. Please tell me if i did mistake on explanation

Hi Norm,
Do you know about reflection in java ? I little don't understand about that.

Thank you Norm,

Finally I got it