package Reflection;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import java.util.Scanner;

public class DynamicWay {

public static void main(String[] args)

throws ClassNotFoundException, InstantiationException, IllegalAccessException, NoSuchMethodException,

SecurityException, IllegalArgumentException, InvocationTargetException {

int a = 100;

int b = 200;

Scanner scanner = new Scanner(System.in);

System.out.println("Enter the ClassName");

String className = scanner.next();

Object obj = Class.forName(className).newInstance(); // It load the

// Class

// Calculator calc = new Calculator();

System.out.println("add");

System.out.println("subtract");

System.out.println("multiply");

System.out.println("divide");

System.out.println("Type Operation Name");

String methodName = scanner.next();

Class cls = obj.getClass();

Method method = cls.getDeclaredMethod(methodName, int.class, int.class);

/*

* Method method = obj.getClass() .getDeclaredMethod (methodName,

* int.class,int.class) ;

*/

Integer result = (Integer) method.invoke(obj, a, b);

System.out.println("Result is " + result);

/*

* switch(operation){ case "add": result= calc.add(a, b); break; case

* "subtract": result=calc.subtract(a, b); break; case "multiply":

* result=calc.multiply(a, b); break; case "divide":

* result=calc.divide(a, b); break; }

* System.out.println("Result is "+result);

*/

}

}