import java.awt.Graphics; import java.awt.Image; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.io.File; import java.io.IOException; import javax.imageio.ImageIO; /** * A small character that can move around the screen. */ public class Sprite implements Actor, KeyListener { private int xpos; private int ypos; private int dx; private int dy; private Image image; /** * Reads a sprite from a png file. * * @param path location of image file * @param xpos initial X coordinate * @param ypos initial Y coordinate */ public Sprite(String path, int xpos, int ypos) { this.xpos = xpos; this.ypos = ypos; try { this.image = ImageIO.read(new File(path)); } catch (IOException e) { e.printStackTrace(); } } @Override public void draw(Graphics g) { g.drawImage(image, xpos, ypos, null); } @Override public void step() { xpos += dx; ypos += dy; } @Override public void keyPressed(KeyEvent e) { switch (e.getKeyCode()) { case KeyEvent.VK_UP: dy = -5; break; case KeyEvent.VK_DOWN: dy = +5; break; case KeyEvent.VK_LEFT: dx = -5; break; case KeyEvent.VK_RIGHT: dx = +5; break; } } @Override public void keyReleased(KeyEvent e) { switch (e.getKeyCode()) { case KeyEvent.VK_UP: case KeyEvent.VK_DOWN: dy = 0; break; case KeyEvent.VK_LEFT: case KeyEvent.VK_RIGHT: dx = 0; break; } } @Override public void keyTyped(KeyEvent e) { // do nothing } }