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Developer Guide > GS1-128/EAN-128 Generation Guide

GS1-128/EAN-128 Barcode Sample Code & Barcode Property Settings



1. Generate GS1-128/EAN-128 in Java Class

The following Java code illustrates how to generate a GS1-128/EAN-128 barcode in a Java class

	Linear barcode = new Linear();
        barcode.setType(Linear.EAN128);
        // barcode data to encode
        barcode.setData("(21)~10012345777(21)12345678");

        barcode.setProcessTilde(true);

        // unit of measure for X, Y, LeftMargin, RightMargin, TopMargin, BottomMargin
        barcode.setUOM(Linear.UOM_PIXEL);
        // barcode module width in pixel
        barcode.setX(3f);
        // barcode module height in pixel
        barcode.setY(75f);

        barcode.setLeftMargin(0f);
        barcode.setRightMargin(0f);
        barcode.setTopMargin(0f);
        barcode.setBottomMargin(0f);
        // barcode image resolution in dpi
        barcode.setResolution(72);

        // disply human readable text under the barcode
        barcode.setShowText(true);
        // human reable text font style
        barcode.setTextFont(new Font("Arial", 0, 12));
        //  ANGLE_0, ANGLE_90, ANGLE_180, ANGLE_270
        barcode.setRotate(Linear.ANGLE_0);

        barcode.renderBarcode("c://barcode.gif");
        
        // generate barcode to BufferedImage object
        BufferedImage bufferedImage = linear.renderBarcode();

	// generate barcode to byte[] object
	byte[] barcodeBytes = linear.renderBarcodeToBytes();

	// render barcode on Graphics2D
	Graphics2D g = ...
	Rectangle2D rectangle = ... 
	linear.renderBarcode(g, rectangle);
	
	// generate barcode and output to OutputStream object
	OutputStream outputStream = ...
	linear.renderBarcode(outputStream);




2. Barcode Property Settings

  • Set the type property to Linear.EAN128.
    Servlet URL Parameter: "Type". Value: 26. Sample: &Type=26
  • Set the data property with the value to encode.
    Type is String.
    • Valid Data Scope:
      • all 128 characters of ASCII
    • Sample: "(21)d12345777(21)12345678"
    Servlet URL Parameter: Data. Sample: &Data=(21)d12345777(21)12345678

    About AI (Application Identifiers)

    In Barcode Library, you can use (dddd) format to encode AI code "dddd".
    For example, to encode AI code 21 with value d12345777, and AI code 21 with value 12345678.
    barcode.setData("AI(21)d12345777AI(21)12345678").

    About ASCII Data Encoding

    In Barcode Library, you can use tilde ~ format to encode any ASCII data (from ASCII value 0 to 127).
    For example, ASCII 100 is char 'd'. ~100 = d. So for the above sample EAN-128 data, you can need first set processTilde to true, set data property = "(21)~10012345777(21)12345678".

    Sample Code
    	barcode.setProcessTilde(true);
    	barcode.setData("(21)~10012345777(21)12345678");
    
  • addCheckSum property is not applied.
  • Set the processTilde property to true, if you want use the tilde character "~" to specify special characters in the encoding data. Default is false.
    Format of the tilde:
    • ~NNN: is used to represent the ASCII character with the value of NNN. NNN is from 000 - 255.

    Servlet Parameter: "ProcessTilde". Values: "t" (true), "f" (false). Sample: &ProcessTilde=t
  • Barcode image size settings: How to control barcode size?
    • Set property uom (Unit of Measure) for properties X, Y, leftMargin, rightMargin, topMargin and bottomMargin.
      Default is Linear.UOM_PIXEL (0). Valid values are Linear.UOM_PIXEL (0), Linear.UOM_CM (1), Linear.UOM_Inch (2).
      Servlet URL Parameter: "UOM". Value: 0 (pixel), 1 (cm), 2 (inch). Sample: &UOM=0
    • Set the X (for barcode module width) and Y (for barcode module height) properties.
      Both types are float. Default X is 3. Y is 75.
      Servlet URL Parameter: "X", "Y". Sample: &X=3&Y=75
    • Set the leftMargin, rightMargin, topMargin and bottomMargin properties, and types are all float.
      Default values are 0 for all 4 margin settings.
      Servlet URL Parameter: "LeftMargin", "RightMargin", "TopMargin", "BottomMargin". Sample: &LeftMargin=0
    • Set the resolution property (Value is expressed in DPI - Dots per inch).
      Default is 72 dpi.
      Servlet URL Parameter: "Resolution". Sample: &Resolution=72
  • Setting up text style in barcode image:
    • Set the showText properties. If this value is true, barcode data will be displayed with the barcode.
      Default is true.
      Servlet URL Parameter: "ShowText". Value: "t" (true), "f" (false). Sample: &ShowText=t
    • Set the textFont property. The font used to display text in barcode image.
      Default is new Font("Arial", Font.PLAIN, 11).
      Servlet URL Parameter: "TextFont". Value format: [font name]|[font style]|[font size]. Sample Values: &TextFont=Arial|Bold|12
  • With rotate property, you can display barcode horizontally or vertically.
    Value can be
    • 0 (Linear.ANGLE_0),
    • 1 (Linear.ANGLE_90),
    • 2 (Linear.ANGLE_180),
    • 3 (Linear.ANGLE_270)

    Default value is 0.
    Servlet URL Parameter: "Rotate". Sample: &Rotate=0


3. All Barcode Types