AnimationApp.java

import java.util.Scanner;
import java.awt.Rectangle;
import java.util.ArrayList;

/**
 * Original text-based version of the game.
 */

public class AnimationApp {

	static ArrayList<Enemy> enemies = new ArrayList<Enemy>();

	/**
	 * Method that controls how the enemy moves. The enemy is set to move in a
	 * specific pattern. The enemy will move to the right until it hits an x
	 * coordinate of 40. Afterwards, it will move down and then to the left,
	 * continuing this pattern until it collides with the player. The enemy's
	 * coordinates will print out after each user input.
	 * 
	 * @param enemy
	 */
	public static void enemyMovement(Enemy enemy) {

		if (enemy.getEnemyMovementRight() == true) {

			if (enemy.getX_Coordinate() == (40)) {
				// if the enemy is against the right wall, it will move down and move left
				enemy.moveDown(5);
				enemy.setEnemyMovementRight(false);
				System.out.println("Enemy position : " + enemy.getX_Coordinate() + " " + enemy.getY_Coordinate());
			}

			else {
				enemy.moveRight(5);
				System.out.println("Enemy position : " + enemy.getX_Coordinate() + " " + enemy.getY_Coordinate());
			}
		}

		else {
			if (enemy.getX_Coordinate() == (-40)) {
				// if the enemy is against the left wall, it will move down and move right
				enemy.moveDown(5);
				enemy.setEnemyMovementRight(true);
				System.out.println("Enemy position : " + enemy.getX_Coordinate() + " " + enemy.getY_Coordinate());
			} else {
				enemy.moveLeft(5);
				System.out.println("Enemy position : " + enemy.getX_Coordinate() + " " + enemy.getY_Coordinate());
			}
		}
	}

	/**
	 * Method that detects when the player and the enemy's rectangles have
	 * intersected, causing the game to end.
	 * 
	 * @param player
	 * @param enemy
	 */
	public static boolean collisionDetection(Player player, Enemy enemy) {
		boolean collision = false;
		Rectangle r1 = player.getUnitHitBox();
		Rectangle r2 = enemy.getUnitHitBox();

		if (r1.intersects(r2))
			collision = true;
		return collision;
	}

	public static void main(String[] args) {

		Player player1 = new Player(0, 0, 5, 5);
		Enemy enemy1 = new Enemy(-40, 25, 5, 5);
		Enemy enemy2 = new Enemy(-30, 25, 5, 5);
		Enemy enemy3 = new Enemy(-20, 25, 5, 5);
		Enemy enemy4 = new Enemy(-10, 25, 5, 5);
		Enemy enemy5 = new Enemy(0, 25, 5, 5);
		enemies.add(enemy1);
		enemies.add(enemy2);
		enemies.add(enemy3);
		enemies.add(enemy4);
		enemies.add(enemy5);
		boolean enemy_movement_right = true;
		Scanner keyboard = new Scanner(System.in);

		System.out.println("Player Position: " + player1.getX_Coordinate() + ", " + player1.getY_Coordinate());

		for (int i = 0; i < enemies.size(); i++)
			System.out.println("Enemy " + i + " position : " + enemies.get(i).getX_Coordinate() + ", "
					+ enemies.get(i).getY_Coordinate());

		while (player1.getLive() == true) {

			System.out.println("Press the 'a' key to move left. Press the 'd' key to move right.");
			char keyEntered = keyboard.next().charAt(0);

			if (keyEntered == 'a') {

				if (player1.getX_Coordinate() == (-50)) {
					// sets a limit to how far the player can move left
					System.out.println("Sorry, you can't move any farther left.");
					System.out.println(
							"Player Position: " + player1.getX_Coordinate() + ", " + player1.getY_Coordinate());
				}

				else {

					player1.moveLeft(5);
					System.out.println(
							"Player Position: " + player1.getX_Coordinate() + ", " + player1.getY_Coordinate());

				}

			}
			if (keyEntered == 'd') {

				if (player1.getX_Coordinate() == 50) {
					// sets a limit to how far the player can move right.
					System.out.println("Sorry, you can't move any farther right.");
					System.out.println(
							"Player Position: " + player1.getX_Coordinate() + ", " + player1.getY_Coordinate());
				}

				else {
					player1.moveRight(5);
					System.out.println(
							"Player Position: " + player1.getX_Coordinate() + ", " + player1.getY_Coordinate());
				}

			}
			for (int i = 0; i < enemies.size(); i++)
				enemyMovement(enemies.get(i));

			for (int i = 0; i < enemies.size(); i++)
				if (collisionDetection(player1, enemies.get(i)) == true) {
					// the game's end condition where the enemy and the player collide.
					player1.setLive(false);
					System.out.println("GAME OVER");
				}
			for (int i = 0; i < enemies.size(); i++) {
				if ((enemies.get(i).getY_Coordinate() == 0)) {
					player1.setLive(false);
					System.out.println("GAME OVER");
				}
			}
		}
	}
}