java-design-patterns/command/src/main/java/com/iluwatar/App.java

package com.iluwatar;

/**
 * 
 * In Command pattern actions are objects that can be executed and undone. The
 * commands in this example are spells cast by the wizard on the goblin.
 * 
 */
public class App {

	public static void main(String[] args) {
		Wizard wizard = new Wizard();
		Goblin goblin = new Goblin();

		goblin.printStatus();

		wizard.castSpell(new ShrinkSpell(), goblin);
		goblin.printStatus();

		wizard.castSpell(new InvisibilitySpell(), goblin);
		goblin.printStatus();
		wizard.undoLastSpell();
		goblin.printStatus();
	}
}