Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>Please go through this <a href="http://javapapers.com/core-java/java-qr-code/" rel="noreferrer">link</a> for complete Tutorial. The author of this code is Joe. <strong>I have not developed this code</strong>, so I am just doing Copy paste to make sure this is available in case link is broken.</p> <p>The author is using ZXing(Zebra Crossing Library) you can download it from <a href="https://code.google.com/p/zxing/" rel="noreferrer">here</a>, for this tutorial.</p> <p><strong>QR Code Write and Read Program in Java:</strong></p> <pre><code>package com.javapapers.java; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.util.HashMap; import java.util.Map; import javax.imageio.ImageIO; import com.google.zxing.BarcodeFormat; import com.google.zxing.BinaryBitmap; import com.google.zxing.EncodeHintType; import com.google.zxing.MultiFormatReader; import com.google.zxing.MultiFormatWriter; import com.google.zxing.NotFoundException; import com.google.zxing.Result; import com.google.zxing.WriterException; import com.google.zxing.client.j2se.BufferedImageLuminanceSource; import com.google.zxing.client.j2se.MatrixToImageWriter; import com.google.zxing.common.BitMatrix; import com.google.zxing.common.HybridBinarizer; import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; public class QRCode { public static void main(String[] args) throws WriterException, IOException, NotFoundException { String qrCodeData = "Hello World!"; String filePath = "QRCode.png"; String charset = "UTF-8"; // or "ISO-8859-1" Map&lt;EncodeHintType, ErrorCorrectionLevel&gt; hintMap = new HashMap&lt;EncodeHintType, ErrorCorrectionLevel&gt;(); hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L); createQRCode(qrCodeData, filePath, charset, hintMap, 200, 200); System.out.println("QR Code image created successfully!"); System.out.println("Data read from QR Code: " + readQRCode(filePath, charset, hintMap)); } public static void createQRCode(String qrCodeData, String filePath, String charset, Map hintMap, int qrCodeheight, int qrCodewidth) throws WriterException, IOException { BitMatrix matrix = new MultiFormatWriter().encode( new String(qrCodeData.getBytes(charset), charset), BarcodeFormat.QR_CODE, qrCodewidth, qrCodeheight, hintMap); MatrixToImageWriter.writeToFile(matrix, filePath.substring(filePath .lastIndexOf('.') + 1), new File(filePath)); } public static String readQRCode(String filePath, String charset, Map hintMap) throws FileNotFoundException, IOException, NotFoundException { BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer( new BufferedImageLuminanceSource( ImageIO.read(new FileInputStream(filePath))))); Result qrCodeResult = new MultiFormatReader().decode(binaryBitmap, hintMap); return qrCodeResult.getText(); } } </code></pre> <p><strong>Maven dependency for the ZXing QR Code library:</strong></p> <pre><code>&lt;dependency&gt; &lt;groupId&gt;com.google.zxing&lt;/groupId&gt; &lt;artifactId&gt;core&lt;/artifactId&gt; &lt;version&gt;2.2&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;com.google.zxing&lt;/groupId&gt; &lt;artifactId&gt;javase&lt;/artifactId&gt; &lt;version&gt;2.2&lt;/version&gt; &lt;/dependency&gt; </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POReading QRCode with Zxing in Java
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USAkshay Taru
    1. USAkshay Taru
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. COWhile this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes.
      singulars
      1. PO
      1. USFlorent
    2. COThanks for the comment, I will update it soon.
      singulars
      1. PO
      1. USAkshay Taru
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload