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I am developing a webapp using Amazon's cloud services and I need to make use of JSON objects. How my project is set up is, I have an HTML form where the user will fill in their information and submit. Once submitted the data will be placed into an online database and a confirmation email is sent to them. Before I can submit the data to the data base I need to place all of it into a JSON object. My servlet, done in Java, looks like this: public class FormHandling extends HttpServlet { //doGet function public void doGet (HttpServletRequest request, HttpServletResponse response) throws

I am a beginner in Spark streaming and Scala. For a project requirement I was trying to run TwitterPopularTags example present in github. As SBT assembly was not working for me and I was not familiar with SBT I am trying to use Maven for building. After a lot of initial hiccups, I was able to create the jar file. But while trying to execute it I am getting the following error. Can anybody help me in resolving this? Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/spark/streaming/twitter/TwitterUtils$ at TwitterPopularTags$.main(TwitterPopularTags.scala:43) at

public class PropHolder { public static Properties prop; static { //code for loading properties from file } } // Referencing the class somewhere else: Properties prop = PropHolder.prop; class PropHolder is a class of my own. The class resides in the same JAR file of the main class. So that should not because any JAR is missing from classpath. When I look in to the JAR file by jar tf myjarfile , I can see the PropHolder.class listed there. Btw: the code is running fine on my local machine. But couldn't work when I deploy it with some script onto a Linux server. So I think it is not the problem

I have actually figured this problem out, but it took me days, so I thought I would paste my solution here to aide others. I am using Fedora 11, and in Eclipse I tried adding a Tomcat 6 server and starting it. I would get the following error: 'Starting Tomcat v6.0 Server at localhost' has encountered a problem. Server Tomcat v6.0 Server at localhost failed to start. Then in my console I got the following: Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/juli/logging/LogFactory at org.apache.catalina.startup.Bootstrap.<clinit>(Bootstrap.java:54) Caused by: java.lang

The following program is throwing error: public class HelloWorld { public static void main(String args[]) { System.out.println("Hello World!"); } } CLASSPATH C:\Program Files\Java\jdk1.6.0_18\bin\ Path C:\Program Files\Java\jdk1.6.0_18\bin\ JAVAHOME C:\Program Files\Java\jdk1.6.0_18\bin Can you please tell me the root cause? Abhi I found one another common reason. If you create the java file inside a package using IDE like eclipse, you will find the package name on the top of your java file like "package pkgName". If you try to run this file from command prompt, you will get the

While running junit test in eclipse I am getting this Exception : java.lang.NoClassDefFoundError: org/hamcrest/SelfDescribing I've added junit.jar library file. I've tried different versions of junit.jar: 4.4 , 4.8 , etc. How do I fix this Exception? Jiacai Liu Add hamcrest-all-X.X.jar to your classpath . Latest version as of Feb 2015 is 1.3: http://code.google.com/p/hamcrest/downloads/detail?name=hamcrest-all-1.3.jar&can=2&q= According to the JUnit GitHub team website ( https://github.com/junit-team/junit/wiki/Download-and-Install ), junit.jar and hamcrest-core.jar are both needed in the