Java UPC-A Generator Tutorial

// Create Java UPCA object 
UPCA barcode = new UPCA(); 

// Set UPCA data text to encode. It must be 11 digits, without the first number system 
   and the last checksum digit.
barcode.setData("12345678912"); 

// Generate UPCA barcode & print into Graphics2D object
barcode.drawBarcode("Java Graphics2D object"); 

// Generate UPCA barcode & encode into GIF format
barcode.drawBarcode("C://barcode-upca.gif"); 

// Generate UPCA barcode & encode into JPEG format
barcode.drawBarcode("C://barcode-upca.jpg");

// Generate UPCA barcode & encode into EPS
barcode.drawBarcode2EPS("C://barcode-upca.eps"); 

import com.onbarcode.barcode.AbstractBarcode; 
import com.onbarcode.barcode.UPCA; 
import javax.servlet.http.HttpServlet; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 
import javax.servlet.ServletException; 
import javax.servlet.ServletOutputStream; 
   
public class BarcodeServlet extends HttpServlet 
{ 
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException 
    { 
        try { 
            UPCA barcode = new UPCA(); 
            barcode.setData("12345678912"); 
                 
            ServletOutputStream servletoutputstream = response.getOutputStream(); 
              
            response.setContentType("image/jpeg"); 
            response.setHeader("Pragma", "no-cache"); 
            response.setHeader("Cache-Control", "no-cache"); 
            response.setDateHeader("Expires", 0); 
           
            // Generate UPCA barcode & output to ServletOutputStream
            barcode.drawBarcode(servletoutputstream); 
      
        } catch (Exception e) { 
            throw new ServletException(e); 
        } 
    } 
}