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  • Is null a class in java?

    - by Somerandomeguy
    According to, http://www.freshvanilla.org:8080/display/www/Java+Interview+Questions Under, Which class is the superclass of every class? null seems to be the answer. I found that new Object().getClass().getSuperClass() verifies the answer as correct. But can null be considered a class? I see all primitive data types are represented as Class objects from java[dot]sun.com/j2se/1.4.2/docs/api/java/lang/Class.html

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  • gauge chart is not displaying any thing

    - by Sandy
    i am trying to display the latest speed in mysql database on guage chart. i have tried so many things but gauge is not display plz any can help me...my code is attached and php part shows the correct value but dont know why guage is not display <?php $host="localhost"; // Host name $username="root"; // Mysql username $password=""; // Mysql password $db_name="mysql"; // Database name $tbl_name="gpsdb"; // Table name // Connect to server and select database. $con=mysql_connect("$host", "$username")or die("cannot connect"); mysql_select_db("$db_name")or die("cannot select DB"); $data = mysql_query("SELECT speed FROM gpsdb WHERE DeviceId=1234 ORDER BY TIME DESC LIMIT 1") or die(mysql_error()); while ($nt = mysql_fetch_assoc($data)) { $speed = $nt['speed']; $jsonTable = json_encode($speed); echo $jsonTable; } ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"/> <title> Google Visualization API Sample </title> <script type="text/javascript" src="//www.google.com/jsapi"></script> <script type="text/javascript"> google.load('visualization', '1', {packages: ['gauge']}); </script> <script type="text/javascript"> function drawVisualization() { // Create and populate the data table. var data = new google.visualization.DataTable(<?=$speed?>); // Create and draw the visualization. new google.visualization.Gauge(document.getElementById('visualization')). draw(data); } google.setOnLoadCallback(drawVisualization); </script> </head> <body style="font-family: Arial;border: 0 none;"> <div id="visualization" style="width: 600px; height: 300px;"></div> </body> </html>

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  • How to handle null response for json object

    - by user1494754
    I get a JSON response as { "edges": [], "nodes": [] } how to check if the objects has null values and handle the case?? JSONObject jobj = new JSONObject(line); JSONArray jArray = jobj.getJSONArray("edges"); if(jArray.length()!=0) { for(int i=0;i<jArray.length();i++){ JSONObject json_data = jArray.getJSONObject(i); x.add((float) json_data.getInt("x")); y.add((float) json_data.getInt("y")); end This retrurns me : org.json.JSONException: end of input at character 0 of

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  • Why does this page scrolls down to the bottom automatically?

    - by Majid
    This happens only with Google Chrome and Safari. This is the page in question: http://jqeedu.tuxfamily.org/pmr/ After opening the landing, click on post your apartment, a form is loaded via ajax, and the page automatically scrolls to the bottom and if you scroll up, it returns to the bottom again! What is causing this?

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  • Wicket @SpringBean doesn't create serializable proxy

    - by vinga
    @SpringBean PDLocalizerLogic loc; When using above I receive java.io.NotSerializableException. This is because loc is not serializable, but this shouldn't be problem because spring beans are a serializable proxies. On the page https://cwiki.apache.org/WICKET/spring.html#Spring-AnnotationbasedApproach is written: Using annotation-based approach, you should not worry about serialization/deserialization of the injected dependencies as this is handled automatically, the dependencies are represented by serializable proxies What am I doing wrong?

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  • Problem with using the XPATH functions

    - by Alex
    I've got a problem with using the XPATH functions. When I try to call some functions like lower-case or upper-case etc,they are not executed and I can't figure the problem out. I included the namespace xmlns:fn="http://www.w3.org/2005/xpath-functions" at the top of my XSL stylesheet and use fn namespace to call these functions but anyway nothing is working. Can anyone explain the reason and what I should do in order to be able to use the following functions? Cheers

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  • How can I change column length using HQL query?

    - by gmugmu
    I tried session.createSQLQuery("ALTER TABLE People MODIFY address VARCHAR(1000);").executeUpdate(); but this throws org.hibernate.exception.SQLGrammarException: could not execute native bulk manipulation query After a lot of googling, the recommendation is to use HQL instead of SQL query to do bulk updates. Not sure how to use HQL to accomplish this. There seems to be no decent HQL documentation for updating column length in a table. Thanks so much for the help.

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  • HTML Language question

    - by Mike
    Note my code below. I am trying to figure out why my data is not changing to Spanish. I understand it to be one line of code and that is all within the HTML attribute lang=”es”. Any help would be greatly appreciated. <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xlmns="http://www.w3.org/1999/xhtml" lang=”es” xml:lang="en"> <head> <title>JavaJam Coffee House</title> <link href="javajam.css" rel="stylesheet" type="text/css" /> </head> <body bgcolor="brown"> <h1>JavaJam Coffee House</h1> <ul> <li>Specialty Coffee and Tea</li> <li>Bagels, Muffins, and Organic Snacks</li> <li>Music and Poetry Readings</li> <li>Usability Studies</li> <li>Open Mic Night</li> </ul> <br></br> <p>12312 Main Street<br> Mountain Home, CA 93923<br> 1-888-555-5555</br> </p> <p> <em> <small>Copyright &copy; 2008 JavaJam Coffee House</em></p> E-Mail <a href="mailto;[email protected]"> Michael J. Crawley</a> </body> </html>

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  • website and protocol restriction (firewall application)

    - by Smith
    Am developing a firewall application that is suppose to restrict website/protocols/webs directories system wide that i choose for example restrict login.domain.com, but not domain.com restrict domain.com/passport not domain.com restrict .tld types e.g .org pls give me some ideas? [edit] Am developing on the windows plat form , from win 2000 to win7, using any vb language vb6 upwards also i want to be able to block any protocol http ftp etc.

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  • jquery to recognize and make hyper links

    - by user349223
    Anyone have a clue how I can use Jquery to find: http:// or www. and ends with .com, .org, .edu store that as a variable and wrap it in <a href="variable"> <a/> So I have a textarea and when people put in links, I would like to then make them into hyperlinks once they are posted. Make sense?

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  • playing songs in html using hyperlink

    - by Sachindra
    this is the code i m using to play songs <a href="http://southgreenvillecoc1.org/BeEncouragedByWhatYouKnow4-25-2010am.wma" style=" text-decoration:none; color:#404040;" target="_blank"> “Be Encouraged by What You Know”</a> what do i need to do to play the song??? the link gets redirected to a different server....anything I need to embed??

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  • why am i getting StackOverflowError?

    - by IttayD
    In groovyConsole I have this: import groovy.util.* import org.codehaus.groovy.runtime.* def gse = new GroovyScriptEngine("c:\\temp") def script = gse.loadScriptByName("say.groovy") this.metaClass.mixin script say("bye") say.groovy contains def say(String msg) { println(msg) }

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  • Can't retrieve an id through swfupload

    - by RichieH
    I'm having trouble retrieving an echoed ajax response through SWFupload. Upon uploading a file, my account.php?action=uploadphotographs echos the number 37, the text field hidFileId should then be updated with this data. I'm not sure if the file is ever properly being submitted. Is there something wrong with my code? Heres a link to my SWFUpload code: http://pastie.org/962656 Thanks a lot!

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  • HTML format using Java mail in android

    - by TheDevMan
    I am trying to implement an HTML format mail using the Java mail in android. I would like to get results like this: When I look at the html format sent from lookout in my GMAIL. I don't see any link, but just has this format: [image: Lookout_logo] [image: Signal_flare_icon] Your battery level is really low, so we located your device with Signal Flare. I was trying the following: Properties props = System.getProperties(); props.put("mail.smtp.starttls.enable", "true"); // added this line props.put("mail.smtp.host", host); props.put("mail.smtp.user", from); props.put("mail.smtp.password", pass); props.put("mail.smtp.port", "587"); props.put("mail.smtp.auth", "true"); javax.mail.Session session = javax.mail.Session.getDefaultInstance(props, null); MimeMessage message = new MimeMessage(session); message.setFrom(new InternetAddress(from)); InternetAddress[] toAddress = new InternetAddress[to.length]; // To get the array of addresses for( int i=0; i < to.length; i++ ) { // changed from a while loop toAddress[i] = new InternetAddress(to[i]); } message.setRecipients(Message.RecipientType.BCC, toAddress); message.setSubject(sub); //message.setText(body); body = "<!DOCTYPE html><html><body><img src=\"http://en.wikipedia.org/wiki/Krka_National_Park#mediaviewer/File:Krk_waterfalls.jpg\">"; message.setContent(body, "text/html; charset=utf-8"); Transport transport = session.getTransport("smtp"); transport.connect(host, from, pass); transport.sendMessage(message, message.getAllRecipients()); transport.close(); When I look at the html format sent with the above code. I get the following: <!DOCTYPE html><html><body><img src="http://en.wikipedia.org/wiki/Krka_National_Park#mediaviewer/File:Krk_waterfalls.jpg> How to make sure the user will not be able to see any html code or URL link like the mail sent by LOOKOUT? Thanks!

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  • What version of Visual Studio is this python compiled with?

    - by leon
    I am trying to find out the version of Visual Study that is used to compile the python on my computer It says Python 2.6.2 (r262:71605, Apr 14 2009, 22:40:02) [MSC v.1500 32 bit (Intel)] on win32 What I do not understand is that MSC V.1500. Does it mean it is compiled with 2005? I cannot find this information on `python.org' neither. Any help is appreciated!

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  • How do you hide an image tag based on an ajax response?

    - by Chris
    What is the correct jquery statement to replace the "//Needed magic" comments below so that the image tags are hidden or unhidden based on the AJAX responses? <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <title>JQuery</title> <style type="text/css"> .isSolvedImage{ width: 68px; height: 47px; border: 1px solid red; cursor: pointer; } </style> <script src="_js/jquery-1.4.2.min.js" type="text/javascript"> </script> </head> <body> <div id='true1.txt' class='isSolvedImage'> <img src="_images/solved.png"> </div> <div id='false1.txt' class='isSolvedImage'> <img src="_images/solved.png"> </div> <div id='true2.txt' class='isSolvedImage'> <img src="_images/solved.png"> </div> <div id='false2.txt' class='isSolvedImage'> <img src="_images/solved.png"> </div> <script type="text/javascript"> $(function(){ var getDivs = 0; //iterate div with class isSolvedImage $("div.isSolvedImage").each(function() { alert('div id--'+this.id); // send ajax requrest $.get(this.id, function(data) { // check if ajax response is 1 alert('div id--'+this.url+'--ajax response--'+data); if(data == 1){ alert('div id--'+this.url+'--Unhiding image--'); //Needed magic //Show image if data==1 } else{ alert('div id--'+this.url+'--Hiding image--'); //Needed magic //Hide image if data!=1 } }); }); }); </script> </body> </html>

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  • Download Drupal Documentation?

    - by Rosarch
    I would like to download documentation of the Drupal hooks, and whatever else would be useful. I've been saving a few pages piecemeal to my hard drive, but it would take too long to download the entire api.drupal.org this way. Is there someplace where I can get it all at once?

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  • cx-freeze + linux + python 2.6 + wxpython

    - by avp
    Hi All, Not able to create standalone python binary package 1) The binary package works only on the machine on which it is build 2) There is always an error with respect console.py dependent on cx_freeze and wx libraries (.so files). 3) Tried the rpath trick suggested at this link http://wiki.wxpython.org/CreatingStandaloneExecutables 4) I have also experimented with GUI2exe , but still dependency problem exists. Please let me know if there is working python script to solve these dependence problem of cx_freeze and wx._core (.so) files. Thank you

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  • Do compiled PHP scripts exist?

    - by dabito
    Hi, I am wondering if anyone has used or read about PHP scripts compiled as a .so extension for Apache... Thing is I think I remember reading about it somewhere but dont know if such a thing exists. This looks promising, but incomplete and abandoned: http://phpcompiler.org/ Im interested because i think it could improve performance... Perhaps someone could point out a framework or apache extension that does this. Thanks!!

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