ImageIO.read(getClass().getResource("/ruta/a/imagen"));

public void paintComponent(Graphics g){
        super.paintComponent(g);
        Graphics2D g2d = (Graphics2D)g;
        g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
             RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
        Image im = ImageIO.read(new File("nave.png"));      
        g2d.drawImage(im, x,y,null);
        move();
}

import java.io.*;
import javax.print.*;
 
public class PrintTest {
 public static void main(String[] args) throws IOException {
  //we are going to print "printtest.txt" file which is inside working directory
  File file = new File("printtest.txt");
  InputStream is = new BufferedInputStream(new FileInputStream(file));
 
  //Discover the default print service. If you call PrintServiceLookup.lookupPrintServices
  //then it will return an array of print services available and you can choose a
  //printer from them
  PrintService service = PrintServiceLookup.lookupDefaultPrintService();
 
  //Doc flavor specifies the output format of the file (Mime type + Char encoding)
  //You can retrieve doc flavors supported by the printer, like this
  //DocFlavor [] supportedFlavors = service.getSupportedDocFlavors();
  DocFlavor flavor = DocFlavor.INPUT_STREAM.TEXT_PLAIN_US_ASCII;  
 
 
  // Create the print job
  DocPrintJob job = service.createPrintJob();
  //Create the Doc. You can pass set of attributes(type of PrintRequestAttributeSet) as the 
  //3rd parameter specifying the page setup, orientation, no. of copies, etc instead of null. 
  Doc doc = new SimpleDoc(is, flavor, null);
 
  //Order to print, (can pass attributes instead of null)
  try {
   job.print(doc, null);
  } catch (PrintException e) {
   e.printStackTrace();
  }  
 
  //DocPrintJob.print() is not guaranteed to be synchronous. So it's better to wait on completion
  //of the print job before closing the stream. (See the link below)
  is.close();
  System.out.println("Printing done....");
 }
 
}

public class GUI extends JFrame {
 
	private Controller ctrl;
 
	public GUI() {
		this.ctrl = this;
		buildGUI();
	}
 
	private void buildGUI() {
		JButton btnOne = new JButton("btnOne");
		JButton btnTwo = new JButton("btnTwo");
 
		btnOne.addActionListener(ctrl);
		btnTwo.addActionListener(ctrl);
		...
	}
}
 

public class Controller implements ActionListener {
 
	private GUI gui;
	private Timer timer;
	private int clicCount = 0;
 
	public Controller(GUI gui) {
		this.gui = gui;
		timer = new Timer();
	}
 
	public Controller
	@Override public void actionPerformed(ActionEvent evt) {
		if(evt.getActionCommand().equals("btnOne")) {
			clicCount++;
			if(clicCount == 2) {
				timer.cancel();
				return;
			}
			timer.schedule(new ThreadBuilder("btnOne", "Mensaje 1", gui), 0, 1000);
		}
		else if (evt.getActionCommand().equals("btnTwo")) {
			clicCount++;
			if(clicCount == 2) {
				timer.cancel();
				return;
			}
			timer.schedule(new ThreadBuilder("btnTwo", "Mensaje 2", gui), 0, 2000);
		}
	}
}

public class ThreadBuilder implements TimerTask {
 
	private String actionCommand;
	private String message;
	private GUI gui;
 
	public ThreadBuilder(String actionCommand, String message GUI gui) {
		this.actionCommand = actionCommand;
		this.message = message;
		this.gui = gui;
	}
 
	@Override public void run() {
		if(actionCommand.equals("btnOne")) {
			gui.getTextAreaOne().setText(message);
		} else {
			gui.getTextAreaTwo().setText(message);
		}
	}
}

@LocalBean
@Singleton
public class ProductManager {
	@PersistenceContext(unitName="NOMBRE_DE_PERSISTENCIA-EN_PERSISTENCE.XML")
	private EntityManager em;
 
	public List<Product> findAll() {
		List<Product> products;
 
		try {
			TypedQuery<Product> query = em.createQuery("SELECT p FROM Products p");
			products = query.getResultList();
		} catch(Exception ex) {
			ex.printStackTrace();
		}
		return products;
	}
 
	public Product find(int id) {
		return em.find(Product.class, id);
	}
}

@Path("/products")
public class ProductsService {
 
	@Inject private ProductManager manager;
 
	@GET
	@Path("/products/all")
	@Procudes("application/json")
	public List<Product> findAll() {
		return manager.findAll();
	}
 
	@POST
	@Path("/products/edit/{i}")
	public String edit(@PathParam("i") int id) {
		Product product = (Product) manager.find(id);
		// crear un formulario que tenga los datos del producto y lo devolvemos
		String editProduct = ...
		return editProduct;
	}
 
	@GET
	@Path("/products/{i}")
	@Produces("application/json")
	public Product find(@PathParam("i") int id) {
		return manager.find(id);
	}
 
}

http://tudominio:puerto/productos/5

http://tudominio:puerto/products

Image image = ImageIO.read(new File("/ruta/a/tu/imagen"));