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| NoClassDefFoundError: java.awt.* - WMB V7 Linux |
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Message
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| sourdas2 |
 Posted: Tue Nov 19, 2013 3:37 am Post subject: NoClassDefFoundError: java.awt.* - WMB V7 Linux |
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Voyager
Joined: 21 Apr 2006
Posts: 90
Location: Kolkata,India
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I am using WMB v7.0.0.4.
I have created one static java method and the java method is using java.awt.* classes. I am calling the static java method from ESQL.
Everything works fine when I test the message flow in Windows brokers. When I test the message flow in Linux broker, the following exception is thrown -
| Quote: |
| java.lang.NoClassDefFoundError: java.awt.image.BufferedImage (initialization failure) |
The broker configuration and version in Windows and Linux systems are exactly same. Any idea on this?
_________________
Thanks and Warm Regards
Sourav |
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| mqjeff |
| Posted: Tue Nov 19, 2013 3:49 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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So you know that AWT stands for "Abstract Window Toolkit", right? That it's a set of classes designed for drawing stuff on a GUI interface.
It's entirely likely that the Unix broker is running under an environment that has no GUI console available to it at all. It's much harder to do that in Windows.
What code are you trying to run in Broker that wants to use AWT? |
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| sourdas2 |
| Posted: Tue Nov 19, 2013 4:08 am Post subject: |
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Voyager
Joined: 21 Apr 2006
Posts: 90
Location: Kolkata,India
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Thanks mqjeff.
I am trying to generate QR Code in base64 encoded format.
| Code: |
package com.jci.qrcode;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Hashtable;
import javax.imageio.ImageIO;
import sun.misc.BASE64Encoder;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
public class GenQRCode {
public static String generate(String codeText) {
String imageInBase64 = new String();
int size = 125;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
Hashtable<EncodeHintType, ErrorCorrectionLevel> hintMap = new Hashtable<EncodeHintType, ErrorCorrectionLevel>();
hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
QRCodeWriter qrCodeWriter = new QRCodeWriter();
BitMatrix byteMatrix = qrCodeWriter.encode(codeText,BarcodeFormat.QR_CODE, size, size, hintMap);
int qrcodeWidth = byteMatrix.getWidth();
BufferedImage bufImage = new BufferedImage(qrcodeWidth, qrcodeWidth,
BufferedImage.TYPE_INT_RGB);
bufImage.createGraphics();
//Create Image
Graphics2D graphics = (Graphics2D) bufImage.getGraphics();
graphics.setColor(Color.WHITE);
graphics.fillRect(0, 0, qrcodeWidth, qrcodeWidth);
graphics.setColor(Color.BLACK);
for (int i = 0; i < qrcodeWidth; i++) {
for (int j = 0; j < qrcodeWidth; j++) {
if (byteMatrix.get(i, j)) {
graphics.fillRect(i, j, 1, 1);
}
}
}
//Convert Image into Base64 encode string
ImageIO.write( bufImage, "bmp", baos );
byte[] imageInBytes = baos.toByteArray();
BASE64Encoder encoder = new BASE64Encoder();
imageInBase64 = encoder.encode(imageInBytes);
baos.close();
} catch (WriterException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return imageInBase64;
}
} |
_________________
Thanks and Warm Regards
Sourav |
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| stoney |
| Posted: Tue Nov 19, 2013 4:25 am Post subject: |
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Centurion
Joined: 03 Apr 2013
Posts: 140
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| leona313 |
| Posted: Thu May 29, 2014 6:58 pm Post subject: |
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Newbie
Joined: 29 May 2014
Posts: 2
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| imageat |
| Posted: Fri May 30, 2014 12:18 am Post subject: |
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Newbie
Joined: 30 May 2014
Posts: 2
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| leona313 wrote: |
| hey, as for java , i used it to create barcode ,qr code |
do you have any detailed tutorial that can share with us. thanks i want to create qr code in java. |
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