java-design-patterns/subclass-sandbox/src/main/java/com/iluwatar/subclasssandbox/App.java

/*
 * The MIT License
 * Copyright © 2014-2019 Ilkka Seppälä
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.iluwatar.subclasssandbox;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * The subclass sandbox pattern describes a basic idea, while not having a lot
 * of detailed mechanics. You will need the pattern when you have several similar
 * subclasses. If you have to make a tiny change, then change the base class,
 * while all subclasses shouldn't have to be touched. So the base class has to be
 * able to provide all of the operations a derived class needs to perform.
 */
public class App {

  private static final Logger LOGGER = LoggerFactory.getLogger(App.class);

  /**
   * Entry point of the main program.
   * @param args Program runtime arguments.
   */
  public static void main(String[] args) {
    LOGGER.info("Use superpower: sky launch");
    var skyLaunch = new SkyLaunch();
    skyLaunch.activate();
    LOGGER.info("Use superpower: ground dive");
    var groundDive = new GroundDive();
    groundDive.activate();
  }

}