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  • Google Maps API V3 and stringByEvaluatingJavaScriptFromString?

    - by Joseph
    Hi, I'm writing up an iPhone app using the Google Maps API V3, and I was wondering if it is still possible the use the stringByEvaluatingJavaScriptFromString function in the (void)webViewDidFinishLoad:(UIWebView *)webView function? A simple example being changing the map type (Assuming basic map setup): - (void)webViewDidFinishLoad:(UIWebView *)webView{ [webView stringByEvaluatingJavaScriptFromString:@"map.setMapTypeId(google.maps.MapTypeId.SATELLITE);"];} This was very possible the the 2.0 API, but I can't seem to get it right in the 3.0 API. Any insight would be much appreciated.

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  • connect to web API from ..NET

    - by Saif Khan
    How can I access and consume a web API from .NET? The API is not a .NET API. Here is sample code I have in Ruby require 'uri' require 'net/http' url = URI.parse("http://account.codebasehq.com/widgets/tickets") req = Net::HTTP::Post.new(url.path) req.basic_auth('dave', '6b2579a03c2e8825a5fd0a9b4390d15571f3674d') req.add_field('Content-type', 'application/xml') req.add_field('Accept', 'application/xml') xml = "<ticket><summary>My Example Ticket</summary><status-id>1234</status-id><priority-id>1234</priority-id><ticket-type>bug</ticket-type></ticket>" res = Net::HTTP.new(url.host, url.port).start {|http| http.request(req, xml)} case res when Net::HTTPCreated puts "Record was created successfully." else puts "An error occurred while adding this record" end Where can I find information on consuming API like this from .NET? I am aware how to use .NET webservices.

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  • Retrieving image from database using Ajax

    - by ama
    I'm trying to read image from database with Ajax, but I could not read the xmlhttp.responseText to the img src. The image is saved as binary data in database and also retrieved as binary data. I'm using Ajax in JSP, because I want to give the user the ability to upload images and I will view the last uploaded image, on mouse over action the Ajax will be activated and get the image back, the problem is in reading the img from the response. This is the Ajax function: function ajaxFunction(path) { if (xmlhttp) { var s = path; xmlhttp.open("GET", s, true); xmlhttp.onreadystatechange = handleServerResponse; xmlhttp.send(null); } } function handleServerResponse() { if (xmlhttp.readyState == 4) { var Image = document.getElementById(Image_Element_Name); document.getElementById(Image_Element_Name).src = "data:" + xmlhttp.responseText; } } I also got exception in the server: 10415315 [TP-Processor1] WARN core.MsgContext - Error sending end packet java.net.SocketException: Broken pipe at java.net.SocketOutputStream.socketWrite0(Native Method) at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92) at java.net.SocketOutputStream.write(SocketOutputStream.java:136) at org.apache.jk.common.ChannelSocket.send(ChannelSocket.java:537) at org.apache.jk.common.JkInputStream.endMessage(JkInputStream.java:127) at org.apache.jk.core.MsgContext.action(MsgContext.java:302) at org.apache.coyote.Response.action(Response.java:183) at org.apache.coyote.Response.finish(Response.java:305) at org.apache.catalina.connector.OutputBuffer.close(OutputBuffer.java:281) at org.apache.catalina.connector.Response.finishResponse(Response.java:478) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:154) at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200) at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:283) at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:773) at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:703) at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:895) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685) at java.lang.Thread.run(Thread.java:619) 10415316 [TP-Processor1] WARN common.ChannelSocket - processCallbacks status 2

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  • Caching web API proxy?

    - by Jeremy Dunck
    I was wondering if anyone knows of a caching proxy specifically for dealing with API responses? Ideally, I'd be able to declare what caching policy to use for different API semantics, e.g. cache album art for 1 day, cache favorite tweets for 5 minutes, cache map tiles forever, except invalidate when this other API is called. I know about using Apache, Squid, etc for caching in general -- I'm just hoping for something with nicer usage semantics by restricting the design goal to dealing with APIs rather than the web in general.

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  • Interacting with RESTful API's via Javascript?

    - by Alex
    Hi there, to start off, I know C++, C#, Python, some Ruby, and basic Javascript. Anyway, my question revolves around how to interact with RESTful API's via Javascript. I haven't been able to find any good examples on various websites, and so I've come here. So my basic question is: How do I interact with RESTful API's via JS? And where can I find out how to implement OAuth in JS? I know how to get my keys and such, just not how to actually code them in. Below is an example of a twitter API status update run from my MAC terminal with curl: curl -u username:password -d "my tweet" http://api.twitter.com/1/statuses/update.json How can I implement this in Javascript (preferably with OAuth authentication)? This would at least start me going in the right direction. Thanks so much!!

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  • Need to capture and store receiver's details via IPN by using Paypal Mass Pay API

    - by Devner
    Hi all, This is a question about Paypal Mass Pay IPN. My platform is PHP & mySQL. All over the Paypal support website, I have found IPN for only payments made. I need an IPN on similar lines for Mass Pay but could not find it. Also tried experimenting with already existing Mass Pay NVP code, but that did not work either. What I am trying to do is that for all the recipients to whom the payment has been successfully sent via Mass Pay, I want to record their email, amount and unique_id in my own database table. If possible, I want to capture the payment status as well, whether it has been a success of failure and based upon the same, I need to do some in house processing. The existing code Mass pay code is below: <?php $environment = 'sandbox'; // or 'beta-sandbox' or 'live' /** * Send HTTP POST Request * * @param string The API method name * @param string The POST Message fields in &name=value pair format * @return array Parsed HTTP Response body */ function PPHttpPost($methodName_, $nvpStr_) { global $environment; // Set up your API credentials, PayPal end point, and API version. $API_UserName = urlencode('my_api_username'); $API_Password = urlencode('my_api_password'); $API_Signature = urlencode('my_api_signature'); $API_Endpoint = "https://api-3t.paypal.com/nvp"; if("sandbox" === $environment || "beta-sandbox" === $environment) { $API_Endpoint = "https://api-3t.$environment.paypal.com/nvp"; } $version = urlencode('51.0'); // Set the curl parameters. $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $API_Endpoint); curl_setopt($ch, CURLOPT_VERBOSE, 1); // Turn off the server and peer verification (TrustManager Concept). curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_POST, 1); // Set the API operation, version, and API signature in the request. $nvpreq = "METHOD=$methodName_&VERSION=$version&PWD=$API_Password&USER=$API_UserName&SIGNATURE=$API_Signature$nvpStr_"; // Set the request as a POST FIELD for curl. curl_setopt($ch, CURLOPT_POSTFIELDS, $nvpreq); // Get response from the server. $httpResponse = curl_exec($ch); if(!$httpResponse) { exit("$methodName_ failed: ".curl_error($ch).'('.curl_errno($ch).')'); } // Extract the response details. $httpResponseAr = explode("&", $httpResponse); $httpParsedResponseAr = array(); foreach ($httpResponseAr as $i => $value) { $tmpAr = explode("=", $value); if(sizeof($tmpAr) > 1) { $httpParsedResponseAr[$tmpAr[0]] = $tmpAr[1]; } } if((0 == sizeof($httpParsedResponseAr)) || !array_key_exists('ACK', $httpParsedResponseAr)) { exit("Invalid HTTP Response for POST request($nvpreq) to $API_Endpoint."); } return $httpParsedResponseAr; } // Set request-specific fields. $emailSubject =urlencode('example_email_subject'); $receiverType = urlencode('EmailAddress'); $currency = urlencode('USD'); // or other currency ('GBP', 'EUR', 'JPY', 'CAD', 'AUD') // Add request-specific fields to the request string. $nvpStr="&EMAILSUBJECT=$emailSubject&RECEIVERTYPE=$receiverType&CURRENCYCODE=$currency"; $receiversArray = array(); for($i = 0; $i < 3; $i++) { $receiverData = array( 'receiverEmail' => "[email protected]", 'amount' => "example_amount", 'uniqueID' => "example_unique_id", 'note' => "example_note"); $receiversArray[$i] = $receiverData; } foreach($receiversArray as $i => $receiverData) { $receiverEmail = urlencode($receiverData['receiverEmail']); $amount = urlencode($receiverData['amount']); $uniqueID = urlencode($receiverData['uniqueID']); $note = urlencode($receiverData['note']); $nvpStr .= "&L_EMAIL$i=$receiverEmail&L_Amt$i=$amount&L_UNIQUEID$i=$uniqueID&L_NOTE$i=$note"; } // Execute the API operation; see the PPHttpPost function above. $httpParsedResponseAr = PPHttpPost('MassPay', $nvpStr); if("SUCCESS" == strtoupper($httpParsedResponseAr["ACK"]) || "SUCCESSWITHWARNING" == strtoupper($httpParsedResponseAr["ACK"])) { exit('MassPay Completed Successfully: '.print_r($httpParsedResponseAr, true)); } else { exit('MassPay failed: ' . print_r($httpParsedResponseAr, true)); } ?> In the code above, how and where do I add code to capture the fields that I requested above? Any code indicating the solution is highly appreciated. Thank you very much.

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  • Problem calling Java from PHP script

    - by Jack
    I am working on windows. I am running PHP (5.1.3) scripts on Tomcat using PHP/Java bridge. Here is my simple code //test.php <?php require_once("java\Java.inc"); $systemInfo = new Java("Test"); print $systemInfo->foo(); ?> Test.class is in the same folder as test.php. But the php file is not able to locate the test class and I get the following error - Fatal error: Uncaught [[o:Exception]:"java.lang.Exception: CreateInstance failed: new Test. If I use a standard class like below. It works - <?php require_once("java\Java.inc"); $systemInfo = new Java("java.lang.System"); print "Total seconds since January 1, 1970: ".$systemInfo->currentTimeMillis(); ?> What should I do? 1)Should I copy my class to the standard location where all Java classes are kept. (What is this location?) 2) Do some changes in the php.ini file

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  • fluent api complex example

    - by intern
    we have tried some of simple Fluent API examples. to brush up our skills we want to move ahead to complex examples. but we do not what to make as a complex fluent api. can anyone suggest what should we make or where can we get the idea about it? we have recently started writing fluent api codes in Ruby and have tested very basic ones. Now we want to move to complex ones to get better idea about it.

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  • Is there a Google 3d Warehouse API?

    - by Jayesh
    Does anyone know if there is an official or unofficial API for Google 3D warehouse. I know of the iPhone app NaviCAD, which shows Collada models from Google Warehouse - it has search, most-viewed, most-recent functionality; so I guess it is using some sort of API to get that data. But I couldn't find any auch api after searching around. Do you know if there is any?

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  • Oracle java 6 on ubuntu

    - by Shanee
    The java library I need (jpcap) only works on java 6, it won't work with java 7 (and I have tried :( ), is it still possible to install java 6 on ubuntu? Only according to https://help.ubuntu.com/community/Java#Choosing_the_default_Java_to_use, 'Oracle (Sun) Java 6 is no longer available to be distributed by Ubuntu, because of license issues' I've tried to use the instructions on the same site but they don't seem to work... "./jre-6u34-linux-i586.bin" doesn't seem to do anything! Thanks!

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  • how to put api key when sharing with twitter

    - by kassar
    I wrote a code in objective c for sharing on twitter, I pass in to the api the username & password and it runs successfully. I have registered a twitter api key for my application but I don't know how I can pass it in the twitter api. Could you plz help me? Sorry for my english.

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  • How to store an object in Riak with the Java client?

    - by Jonas
    I have setup Riak on a Ubuntu machine, and it seam to work if I do riak ping. Now I would like to use the Riak Java client to store an object, but it doesn't work. I get com.basho.riak.client.response.RiakIORuntimeException when I try to store an object. What am I doing wrong? Is there a way to test if I can access riak from my java client? Do I have to create a Bucket first? how? import com.basho.riak.client.RiakClient; import com.basho.riak.client.RiakObject; import com.basho.riak.client.response.FetchResponse; public class RiakTest { public static void main(String[] args) { // connect RiakClient riak = new RiakClient("http://192.168.1.107:8098/riak"); // create object RiakObject o = new RiakObject("mybucket", "mykey", "myvalue"); // store riak.store(o); } }

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  • Tinyurl API Example - Am i doing it right :D

    - by Paul Weber
    Hi ... we use super-long Hashes for the Registration of new Users in our Application. The Problem is that these Hashes break in some Email Clients - making the Links unusable. I tried implementing the Tinyurl - API, with a simple Call, but i think it times out sometimes ... sometimes the mail does not reach the user. I updated the Code, but now the URL is never converted. Is Tinyurl really so slow or am i doing something wrong? (I mean hey, 5 Seconds is much in this Times) Can anybody recommend me a more reliable service? All my Fault, forgot a false in the fopen. But i will leave this sample of code here, because i often see this sample, wich i think does not work very reliable: return file_get_contents('http://tinyurl.com/api-create.php?url='.$u); This is the - i think fully working sample. I would like to hear about Improvements. static function gettinyurl( $url ) { $context = stream_context_create( array( 'http' => array( 'timeout' => 5 // 5 Seconds should be enough ) ) ); // get tiny url via api-create.php $fp = fopen( 'http://tinyurl.com/api-create.php?url='.$url, 'r', $context); // open (read) api-create.php with long url as get parameter if( $fp ) { // check if open was ok $tinyurl = fgets( $fp ); // read response if( $tinyurl && !empty($tinyurl) ) // check if response is ok $url = $tinyurl; // set response as url fclose( $fp ); // close connection } // return return $url; // return (tiny) url }

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  • Compiling a bunch of stuff in the folder (java, on a mac)

    - by David
    two questions: how do i compile a .java file that isn't on my username (like something in documents or some other sub folder) if i have multiple .java files and i compile one that contains method that are contained in the others does the compiler compile those other files. heres an example of the second question. example1.java: class example1 { main () { example2.method () } } example2.java: class example2 { method () } When i compile example1.java will example2.java also be compiled?

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  • Java UnknownFormatConversionException

    - by user1672458
    The code below is throwing this error, and I'm not sure why. It's clearly a problem with outputting String.format to the str variable, but I don't know what's wrong with it. Exception in thread "main" java.util.UnknownFormatConversionException: Conversion = 'i' at java.util.Formatter$FormatSpecifier.conversion(Unknown Source) at java.util.Formatter$FormatSpecifier.<init>(Unknown Source) at java.util.Formatter.parse(Unknown Source) at java.util.Formatter.format(Unknown Source) at java.util.Formatter.format(Unknown Source) at java.lang.String.format(Unknown Source) at Donor.toString(Donor.java:41) at Donor.main(Donor.java:65) - import java.util.Scanner; public class Donor { public String name; public int age; public double donation; Donor() { //Initialized to these values for debugging name = "NoName"; age = 0; donation = 0; } Donor(String nameinit, int ageinit, double donationinit) { name = nameinit; age = ageinit; donation = donationinit; } public String toString() { String str = ""; str = String.format("%s-30%i-6$%d-20", name, age, donation); return str; } public static void main(String[] args) { Scanner input = new Scanner(System.in); String nameinit = null; int ageinit = -1; double donationinit = -1; String outp = null; System.out.print("Enter the donor's name: "); nameinit = input.nextLine(); System.out.print("Enter the donor's age: "); ageinit = input.nextInt(); System.out.print("Enter the donation amount: "); donationinit = input.nextDouble(); Donor d = new Donor(nameinit, ageinit, donationinit); outp = d.toString(); System.out.printf("%s30 %s6 %s10", "Name", "Age", "Donation"); System.out.print("\n" + outp); input.close(); } }

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  • Questions every good Java/J2EE Developer should be able to answer?

    - by Rachel
    I was going through Questions every good .Net developer should be able to answer and was highly impressed with the content and approach of this question, and so in the same spirit, I am asking this question for Java/J2EE Developer. What questions do you think should a good Java/J2EE programmer be able to answer? I am marking this question as community wiki as it is not user specific and it aims to serve programming community at large. Looking forward for some amazing responses. EDIT: Please answer questions too, as suggested in the comments, so that people could learn something new regarding the language, too.

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  • Blackberry Widget vs Java SDK

    - by rithanyalaxmi
    Hi, I am a newbie to this forum,I was going through the documents of both Blackberry Widget and Java SDK. I have the following doubts to get clarified:- 1) Advantages and disadvantages of Java SDK and Widget SDK? 2) When to go for Java SDK and Widget SDK? 3) Both Java and Widget applications require the latest blackberry OS 5.0? OR whether they are compatible with the lower versions as well? 4) Whatever developed with Java SDK can be done with widget SDK? similarly the vice-versa? 5) Is it possible to create the .java classes for Widget application development? 6) Whether all the blackberry models supports both Java and Widget ? 7) What are the Databases the blackberry Java and Widget supports? Please do shed some light into this as i was unable to find a suitable documentation on these. Thanks, Rithu

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  • What happens when several Java servlet apps running on the same port ?

    - by Frank
    Something strange happened to my servlets and I think I've figured out why, yet I'm more confused. I used Netbean6.7 to develop a Paypal IPN (Instant Payment Notification) message servlet, it listens on port 8080 by default for Paypal IPN messages. I used some sample Java code from it's web site, but when it ran, only about 1 in 10 messages came through, and they looked correct, but why 1 in 10 ? Not 100% or none ? So I asked some questions here and got some advices, one in particular points me to Google's App Engine, so I downloaded it and ran the demo guestbook while my IPN servlet is still running on Netbeans, the strange thing happened, after I entered "appengine-java-sdk-1.3.2\bin\dev_appserver.cmd appengine-java-sdk-1.3.2\demos\guestbook\war" from the command prompt, I went to the following url on my browser "http://localhost:8080/", I thought I would see the Google demo guestbook page, NO, what I saw was another servlet I developed 2 years ago : "Web Academy", online course registration app. How can that happen ? I never started it, and I haven't touch that project for years. I guess because it's also listening on port 8080, so now I understand why the IPN messages only came through 1 in 10 times, because another servlet was also listening on that port and could have got the messages intended for IPN, or some how those two servlets' processes mixed up and therefore couldn't respond to Paypal properly, and failed. In order to verify some of my guesses, I turn off Netbeans, and ran the Google guestbook again at the prompt, this time on my browser http://localhost:8080/ points to the demo guestbook page. My Urls look like this : [A] Paypal IPN : http://localhost:8080/PayPal_App/PayPal_Servlet [B] Web Academy : http://localhost:8080/ So now, my questions are : <1> Why the "Web Academy" servlet was auto started when I ran the Paypal servlet ? <2> If I change the IPN listening port to 8083, would that mean I can run both of them on my PC at the same time without affecting each other ? <3> But I still don't understand, [A] and [B] look different, if a page for [A] is refreshed, it should show the Paypal content, and another page looking at [B] should show the Web Academy content, and that's exactly what happens when I started Netbeans to run the Paypal servlet, both pages show their respective content correctly side by side without interfering with each other, how come the IPN messages couldn't get through 100% of the time ? <4> In Netbeans how to assign 8080 to servlet [A] and assign port 8083 to servlet [B] ? <5> How to turn off auto start of Web Academy by Netbeans ?

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  • What web server should I use if I want to run Java code behind?

    - by Boaz
    At the moment, I have lot's of Java which does all kind of nifty stuff and I'm happy with it. The code is command line driven which have been great so far, but I recently decided I want to make the functionality available through web-services. Since my is complex and I'm happy with the way it's written , I don't want go through the pain of porting it to other languages. So I set out on a google journey to find out what web servers exist (on a Linux machine, though it's interesting to hear the answer without that limitation). From what I could find, it seems that there are two viable options: Apache Tomcat and Sun Java Server. What are the reason to choose one on top of the other? what are the strength of each and what are the weaknesses? Or, perhaps, there is a third one which is much easier, flexible and less cumbersome. Anyone?

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  • I have got this error : Failed to create InitialContext using factory specified in hashtable

    - by user85121
    I just want to add a servlet in web.xml, like this : <servlet> <display-name>AxisJMSServlet</display-name> <servlet-name>JMSListener</servlet-name> <servlet-class>com.sinosoft.prpall.web.jms.JMSListenServlet</servlet-class> <load-on-startup>110</load-on-startup> </servlet> Everything is just fine, and when i started my programs, I got this : javax.naming.NoInitialContextException: Failed to create InitialContext using factory specified in hashtable [Root exception is java.lang.NullPointerException] at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:258) at javax.naming.InitialContext.initializeDefaultInitCtx(InitialContext.java:318) at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:348) at javax.naming.InitialContext.internalInit(InitialContext.java:286) at javax.naming.InitialContext.<init>(InitialContext.java:211) at org.apache.axis.components.jms.JNDIVendorAdapter.getConnectionFactory(JNDIVendorAdapter.java:85) at org.apache.axis.components.jms.JNDIVendorAdapter.getQueueConnectionFactory(JNDIVendorAdapter.java:55) at org.apache.axis.transport.jms.JMSConnectorFactory.createConnector(JMSConnectorFactory.java:227) at org.apache.axis.transport.jms.JMSConnectorFactory.createServerConnector(JMSConnectorFactory.java:156) at com.sinosoft.prpall.web.jms.JMSListenServlet.init(JMSListenServlet.java:60) at javax.servlet.GenericServlet.init(GenericServlet.java:241) at weblogic.servlet.internal.StubSecurityHelper$ServletInitAction.run(StubSecurityHelper.java:283) at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321) at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120) at weblogic.servlet.internal.StubSecurityHelper.createServlet(StubSecurityHelper.java:64) at weblogic.servlet.internal.StubLifecycleHelper.createOneInstance(StubLifecycleHelper.java:58) at weblogic.servlet.internal.StubLifecycleHelper.<init>(StubLifecycleHelper.java:48) at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:539) at weblogic.servlet.internal.WebAppServletContext.preloadServlet(WebAppServletContext.java:1981) at weblogic.servlet.internal.WebAppServletContext.loadServletsOnStartup(WebAppServletContext.java:1955) at weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:1874) Can anybody tell me what is going on ?

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  • Drupal: CCK API Docs

    - by Aaron
    Any good CCK API docs out there? I have seen http://api.audean.com/, but can't find what I want there. Basically, I need a function that takes a field name and returns what node type has that field. I wrote my own, but would rather make an API call.

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  • Which Hadoop API should I use?

    - by Niels Basjes
    In the latest Hadoop Studio the 0.18 API of Hadoop is called "Stable" and the 0.20 API of Hadoop is called "Unstable". Now given the fact that we'll start coding a new Hadoop project in the next few weeks; which API should we use and which Hadoop distribution (Apache, Cloudera, Yahoo, ...) should we use? Thanks for your insights.

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  • Exception in thread "main" java.lang.StackOverflowError

    - by Ray.R.Chua
    I have a piece of code and I could not figure out why it is giving me Exception in thread "main" java.lang.StackOverflowError. This is the question: Given a positive integer n, prints out the sum of the lengths of the Syracuse sequence starting in the range of 1 to n inclusive. So, for example, the call: lengths(3) will return the the combined length of the sequences: 1 2 1 3 10 5 16 8 4 2 1 which is the value: 11. lengths must throw an IllegalArgumentException if its input value is less than one. My Code: import java.util.HashMap; public class Test { HashMap<Integer,Integer> syraSumHashTable = new HashMap<Integer,Integer>(); public Test(){ } public int lengths(int n)throws IllegalArgumentException{ int sum =0; if(n < 1){ throw new IllegalArgumentException("Error!! Invalid Input!"); } else{ for(int i =1; i<=n;i++){ if(syraSumHashTable.get(i)==null) { syraSumHashTable.put(i, printSyra(i,1)); sum += (Integer)syraSumHashTable.get(i); } else{ sum += (Integer)syraSumHashTable.get(i); } } return sum; } } private int printSyra(int num, int count){ int n = num; if(n == 1){ return count; } else{ if(n%2==0){ return printSyra(n/2, ++count); } else{ return printSyra((n*3)+1, ++count) ; } } } } Driver code: public static void main(String[] args) { // TODO Auto-generated method stub Test s1 = new Test(); System.out.println(s1.lengths(90090249)); //System.out.println(s1.lengths(5)); } . I know the problem lies with the recursion. The error does not occur if the input is a small value, example: 5. But when the number is huge, like 90090249, I got the Exception in thread "main" java.lang.StackOverflowError. Thanks all for your help. :) I almost forgot the error msg: Exception in thread "main" java.lang.StackOverflowError at Test.printSyra(Test.java:60) at Test.printSyra(Test.java:65) at Test.printSyra(Test.java:60) at Test.printSyra(Test.java:65) at Test.printSyra(Test.java:60) at Test.printSyra(Test.java:60) at Test.printSyra(Test.java:60) at Test.printSyra(Test.java:60)

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