OpenClose.java

package com.minikube.sample.rest.controller;

/**
 * Created By Gorantla, Eresh on 13/Jan/2020
 **/

interface ArithmeticOperation {

	Double calculate(Double value1, Double value2);
}

interface LogicalOperation {

	Boolean calculate(Integer value);
}

class AdditionOperation implements ArithmeticOperation {

	@Override
	public Double calculate(Double value1, Double value2) {
		return value1 + value2;
	}
}

class SubtractionOperation implements ArithmeticOperation {

	@Override
	public Double calculate(Double value1, Double value2) {
		return value1 - value2;
	}
}

public class Main {

	public static void main(String[] args) {
		/**
		 * Operation :: 1 --> Add, 2 --> Sub, 3 --> Multiply, 4 --> Division, 5 --> Mod
		 */
		Integer operation = 1;
		Double value1 = 0.0;
		Double value2 = 0.0;
		switch (operation) {
			case 1:
				AdditionOperation additionOperation = new AdditionOperation();
				additionOperation.calculate(value1, value2);
				break;
			default:
				System.out.println("Operation not permitted..");
		}
	}
}