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POJava XML: IndexOutOfBoundsException When appending a node
 

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  1. POJava XML: IndexOutOfBoundsException When appending a node
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    <p>Now that I am writing a messenger program. The following code shall store the message history. Sadly, I've encountered an "IndexOutOfBounds" exception on a line and I've been trying for a whole day, but still can't figure out the problem. </p> <p>So here it is. </p> <pre><code> public static final SimpleDateFormat SDF = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); public static final String FILE_PATH = "/data/data/com.demo.xmppchat/"; public static Map&lt;Date, String&gt; messagesMap = new TreeMap&lt;Date, String&gt;(); // File should be saved as /username/buddy.xml public static void writeHistory(String username, String buddy, Map&lt;Date, String&gt; messages) { try { // Check if the file exists. If the file does not exist, create and initiate one. File file = new File(FILE_PATH + username); if (!file.exists()) { file.mkdirs(); } file = new File(FILE_PATH + username + "/" + buddy + ".xml"); // file.setReadable(true); file.setWritable(true); file.setExecutable(true); if (!file.exists()) { file.createNewFile(); initiateHistoryFile(username, buddy); } // Now that the XML file should exists as we have created and initialized one. // TODO: // Now we modify the XML file DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance(); DocumentBuilder docBuilder = docFactory.newDocumentBuilder(); Document doc = docBuilder.parse(file); Element root = doc.getDocumentElement(); Element rootE = doc.getDocumentElement(); String s = ""; Node n = null; for (Map.Entry&lt;Date, String&gt; entry : messages.entrySet()) { // &lt;message&gt; Element messageE = doc.createElement("message"); rootE.appendChild(messageE); // Set attribute to &lt;message&gt; element // messageE.setAttribute("id", "1"); // &lt;from&gt; Element fromE = doc.createElement("from"); fromE.appendChild(doc.createTextNode(buddy)); messageE.appendChild(fromE); // &lt;date&gt; Element dateE = doc.createElement("date"); s = SDF.format(entry.getKey()); n = doc.createTextNode(s); dateE.appendChild(n); messageE.appendChild(dateE); // &lt;text&gt; Element textE = doc.createElement("text"); s = entry.getValue(); n = doc.createTextNode(s); textE.appendChild(n); messageE.appendChild(textE); root.appendChild(messageE); // &lt;- *** THIS IS WHERE "IndexOutOfBounds" exception OCCURS! *** } TransformerFactory transformerFactory = TransformerFactory.newInstance(); Transformer transformer = transformerFactory.newTransformer(); DOMSource source = new DOMSource(doc); StreamResult result = new StreamResult(file); transformer.transform(source, result); // Write the file // FileWriter fileWritter = new FileWriter(file.getName(),true); // BufferedWriter bufferWritter = new BufferedWriter(fileWritter); // bufferWritter.write(""); // bufferWritter.close(); } catch (Exception e) { ToneGenerator toneGenerator = new ToneGenerator(AudioManager.STREAM_SYSTEM, ToneGenerator.MAX_VOLUME); toneGenerator.startTone(ToneGenerator.TONE_PROP_BEEP); e.printStackTrace(); } } </code></pre> <p>The Log:</p> <pre><code>W/System.err(1067): java.lang.IndexOutOfBoundsException: Invalid index 1, size is 0 W/System.err(1067): at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:251) W/System.err(1067): at java.util.ArrayList.add(ArrayList.java:143) W/System.err(1067): at org.apache.harmony.xml.dom.InnerNodeImpl.insertChildAt(InnerNodeImpl.java:126) W/System.err(1067): at org.apache.harmony.xml.dom.InnerNodeImpl.appendChild(InnerNodeImpl.java:52) W/System.err(1067): at com.demo.xmppchat.XMLReadWrite.writeHistory(XMLReadWrite.java:113) </code></pre>
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USMuhammed Refaat
    1. USPriere Law
    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. COpost the exception stack trace
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      1. POJava XML: IndexOutOfBoundsException When appending a node
      1. USAravind R. Yarram
    2. CO[code]W/System.err(1067): java.lang.IndexOutOfBoundsException: Invalid index 1, size is 0 W/System.err(1067): at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:251) W/System.err(1067): at java.util.ArrayList.add(ArrayList.java:143) W/System.err(1067): at org.apache.harmony.xml.dom.InnerNodeImpl.insertChildAt(InnerNodeImpl.java:126) W/System.err(1067): at org.apache.harmony.xml.dom.InnerNodeImpl.appendChild(InnerNodeImpl.java:52) W/System.err(1067): at com.demo.xmppchat.XMLReadWrite.writeHistory(XMLReadWrite.java:113)[/code]
      singulars
      1. POJava XML: IndexOutOfBoundsException When appending a node
      1. USPriere Law
    3. COwhich line of the posted code is line 113? that is where the error seems to be
      singulars
      1. POJava XML: IndexOutOfBoundsException When appending a node
      1. USAravind R. Yarram
 

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