Barbecue is a free and open source Java library for Barcode generation. This requires the library barbecue-1.5-beta1.jar to be in classpath. The following example shows generating Barcode EAN 13.
package com.bethecoder.tutorials.barbecue; import java.io.File; import net.sourceforge.barbecue.Barcode; import net.sourceforge.barbecue.BarcodeFactory; import net.sourceforge.barbecue.BarcodeImageHandler; public class BarCodeEAN13Test { public static void main (String [] args) throws Exception { //Get EAN13 Barcode instance from the Factory. Barcode barcode = BarcodeFactory.createEAN13("400763000011"); File imgFile = new File("testean13.png"); //Write the bar code to PNG file BarcodeImageHandler.savePNG(barcode, imgFile); } }