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error  November 15, 2018 at 11:57 PM
java.lang.NullPointerException at com.knkglob.service.LoginServiceImpl.checkLogin(LoginServiceImpl.java:26) at com.knkglob.controller.LoginController.processForm(LoginController.java:58) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAcce... View Questions/Answers

Sql Server like with  November 9, 2018 at 4:27 AM
SELECT username FROM login WHERE CONTAINS(RelatedWords,'""Insurance"""'); How can we handle this ,throwing error like Syntax error near 'Insurance' in the full-text search condition '""Insurance"""'. please help as soon as possible ... View Questions/Answers

hibernate core 5.3 maven dependency  November 5, 2018 at 9:52 AM
Hi, What is hibernate core 5.3 maven dependency? I want to use Hibernate 5.3 in my project. Thanks ... View Questions/Answers

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elasticsearch java heap space out of memory  November 2, 2018 at 5:40 AM
Hi, How to set heap size in elasticsearch to overcome java heap space out of memory? Thanks ... View Questions/Answers

maven ogm 5.4.0.final dependency  October 30, 2018 at 8:08 PM
Hi, What is maven OGM? give code for maven ogm 5.4.0.final dependency. Thanks ... View Questions/Answers

mapr drill port number  October 30, 2018 at 1:46 AM
Hi, What is the port number in Mapr for accessing Apache drill? I want to know all the mapr drill port numbers. Thanks ... View Questions/Answers

How to show full column content in a Spark Dataframe  October 30, 2018 at 1:12 AM
Hi, How to show full column content in a Spark Dataframe? The code: results.show(); Shows only few data. What is solution? Thanks ... View Questions/Answers

spring-expression maven dependency  October 29, 2018 at 8:20 PM
Hi, What is maven dependency of latest version of spring-expression? What code should i add to get spring-expression maven dependency in my project? Thanks ... View Questions/Answers

maven dependency for apache poi 4.0.0  October 29, 2018 at 7:54 PM
Hi, I want to know the maven dependency code which I should add into my maven project to include Apache POI 4.0.0 library. What is the maven dependency code for Apache poi 4.0.0? Thanks ... View Questions/Answers

org.apache.spark.SparkException: A master URL must be set in your configuration  October 24, 2018 at 4:29 AM
Hi, I my program following error is thrown: org.apache.spark.SparkException: A master URL must be set in your configuration How to fix it? thanks ... View Questions/Answers

What is Graph Database  October 22, 2018 at 5:20 AM
Hi, What is Graph Database? Thanks ... View Questions/Answers

Hadoop Training  October 21, 2018 at 1:18 AM
Hi, What is Hadoop and when it is used? I want to learn Hadoop by joining any Hadoop Training course online. I am in need of job in Big Data but don't have experience in any of the Hadoop technologies. This is the reason I am looking for Hadoop Training online which will teach me it fast.... View Questions/Answers

Bigdata and Hadoop Training  October 21, 2018 at 12:58 AM
Hi, Which is the best online training classes for Big Data? I want to learn it from expert? Thanks ... View Questions/Answers

java replace dot with comma  October 18, 2018 at 2:26 AM
Hi, How to replace dot with command in Java program? thanks ... View Questions/Answers

gremlin query list all graphs  October 12, 2018 at 4:01 AM
Hi, I am trying Gremlin graph query. How to get all the graphs in one query? Thanks ... View Questions/Answers

Exception in thread  October 11, 2018 at 4:30 AM
Hi, In my code following error is coming: Exception in thread "main" java.lang.NoClassDefFoundError: org/json/JSONObject I have imported: import org.json.JSONObject; but its not working. <... View Questions/Answers

Janusgraph rdf  October 10, 2018 at 6:25 AM
Hi, How to use Janusgraph as rdf datastore? I have xml rdf file. How to import it into Janusgraph? Thanks ... View Questions/Answers

how to create tar file in ubuntu  October 10, 2018 at 12:19 AM
Hi, I have a directory with many sub directories and files in it. I want to create tar file of the directory so that it can be moved to another computer easily. I am searching for command to do this. What is easy command for this which i can run in terminal. how to create ... View Questions/Answers

how to disable submit button after login in jsp  October 9, 2018 at 12:21 PM
Hi, I have an application and when user logs in welcome page is displayed. When user clicks on the back button in browser it stars displaying login page. How to prevent this? how to disable submit button after login in jsp? Thanks ... View Questions/Answers

Which is the best online course for learning Hadoop  October 5, 2018 at 11:06 PM
Hi, I want to learn Hadoop Big Data platform to become successful developer in this field. I want to learn Hadoop and Big Data from beginning. How anyone can learn Hadoop and Big Data. Which is the best online course for learning Hadoop? Is online courses helps in learning... View Questions/Answers

java 11 lts release date  October 3, 2018 at 1:30 PM
Hi, When Java 11 is going to be released? Is it released? What are the features of JDK 11 and what is LTS version means? Thanks ... View Questions/Answers

download oracle jdk 11 - How to download  October 3, 2018 at 1:03 PM
Hi, Java 11 is released I want to know where to download it for my computer. What is the url to download Oracle Java 11? Thanks ... View Questions/Answers

run command for all files in directory bash  October 3, 2018 at 6:06 AM
Hi, I have a directory with many many files. I want to run for all files in the directory in Linux. How to do this with bash script? How to run command for all files in directory with bash script? I need this example urgently. Thanks ... View Questions/Answers

How to force cp to overwrite without confirmation  October 3, 2018 at 3:29 AM
Hi, I am copying files in ubuntu from one directory to another directory. But I want to replace all the files in the destination directory with new files. How can I use the cp command? How to force cp to overwrite without confirmation? Thanks ... View Questions/Answers

object orientated task  September 30, 2018 at 4:19 PM
Write a class - Student. Student class consists of student data. For this purpose, you must fulfill the following methods (note - fields of the objects should be marked as private). Student class: Constructors: Construct Student object with name and id as parameters. Student(String name, ... View Questions/Answers

Java program  September 30, 2018 at 3:11 PM
Write a java program which reads in a file, whose name is given by the user ,and o perform the following tasks:- ΓΆβ?¬ΒΆ To read data from the file line by line, this represents information about several persons, such as his first name, last name, age, address, and weight. Then fill the data for ... View Questions/Answers

Vehicle parking management  September 28, 2018 at 10:14 AM
Source code for vehicle parking management system in java swing ... View Questions/Answers

Vehicle parking management  September 28, 2018 at 10:13 AM
Source code for vehicle parking management system in java swing ... View Questions/Answers

Vehicle parking management  September 28, 2018 at 10:13 AM
Source code for vehicle parking management system in java swing ... View Questions/Answers

apache commons io 2.6 maven dependency to add to pom.xml  September 26, 2018 at 8:26 PM
Hi, I am going to use few classes to apache commons io package. I want to add apache commons io 2.6 maven dependency libraries into my project. What is the code to add into pom.xml file? Thanks ... View Questions/Answers

how to install wireshark 2.6 2 on ubuntu 16.04  September 26, 2018 at 4:00 AM
Hi, how to install wireshark 2.6 2 on ubuntu 16.04? Thanks ... View Questions/Answers

What are Big Data and its importance in industries?  September 14, 2018 at 9:51 PM
Hi Guys, I want to understand the Big Data as I am beginner in this field. I am just engineering student and going to finish my engineering education next year. I want to make career in Big Data and Data science. Now it is right time for me to start learning Big data so that I can get job... View Questions/Answers

What is Machine Learning and its uses now a days?  September 14, 2018 at 12:03 PM
Hi, I what to know complete details of machine learning and its details. What is Machine Learning and its uses now a days? Thanks ... View Questions/Answers

elasticsearch allow from all  August 28, 2018 at 12:36 AM
Hi, I am in development environment and want to allow the access of ealsticsearch from all the hosts. Program should access elasticsearch allow from all hosts. How to configure elasticsearch to enable access from all hosts? Which configuration file to change and make it wo... View Questions/Answers

I am beginner and want to learn Java fast  August 17, 2018 at 10:41 PM
Hi, I am a beginner in Java and want to learn it quickly. Which is the best tutorials on roseindia.net to learn it fast? Thanks ... View Questions/Answers

please help me in coding this given program  August 16, 2018 at 12:06 PM
consider the below series: 1,2,1,3,2,5,3,7,5,11,8,13,13,17,..... this series is a mixture of 2 series-all the odd terms in this series from a fibonacci series and all the even terms are the prime numbers in ascending order write a program to find the nth term in this series. (i m unable to code t... View Questions/Answers

error getting repository data for epel repository not found centos 7  August 16, 2018 at 6:01 AM
Hi, Can't find repository while installing one of the software using yum because of the error: error getting repository data for epel repository not found My os is centos 7. How to resolve this? Thanks ... View Questions/Answers

how to open notepad using java  August 13, 2018 at 4:46 AM
Hi, how to open notepad using java? I want to open windows notepad from java program. Thanks ... View Questions/Answers

What is the best way to learn Java on my own?  August 3, 2018 at 11:00 AM
Hi, I am new to job market and after completing my graduation searching for better IT job in market. I am interested in making my career in Java software programming. I want to achieve heights in Java programming. During my college days I did many projects in C and C++. Now I wan... View Questions/Answers

how to get file extension in java  August 2, 2018 at 5:52 AM
Hi, I want to get the file extension in Java. how to get file extension in java? Thanks ... View Questions/Answers

How do I learn Java programming in one day from zero?  August 1, 2018 at 12:07 PM
Hi, I am total beginner in Java programming checking if anyone can learn Java quickly. Is there any way of really learning Java in one day? How do I learn Java programming in one day from zero? I am aware of C and C++ programming language. I have used these to make my coll... View Questions/Answers

Which is best JSP tutorial for beginners  July 29, 2018 at 1:17 PM
Hi, I want to learn JSP online for free and searching for best JSP tutorials on the web. Which is best JSP tutorial for beginners? I am finding many examples to practice many examples. Thanks ... View Questions/Answers

What is jQuery and how it is used?  July 29, 2018 at 12:19 PM
Hi, I want to know more about the jQuery as there is lot of demand of it in Job portals. In most of the website designing and development jobs jQuery is a must. What is jQuery and how it is used? Where to learn jQuery online? Thanks ... View Questions/Answers

What are the best websites to learn jQuery?  July 29, 2018 at 5:56 AM
Hi, There is good demand of experts having experience in jQuery. I am a designer and searching for new job but in most of the Job requirment jQuey is the most asked skill. That's why I have to learn jQuery very fast. So, searching for best website for learning jQuery in less possi... View Questions/Answers

What is the best way to learn Bootstrap?  July 29, 2018 at 5:22 AM
Hi, I am a web designer and searching for the information to learn Bootstrap. can anyone explain me the best way to learn latest Bootstrap framework. Is Bootstrap easy to learn framework and what all things can be done with the Bootstrap? What is the best way to learn Boot... View Questions/Answers

bootstrap 4 pull-right  July 29, 2018 at 3:34 AM
Hi, I am trying to align a button with the .pull-right class but don't know why its not working in Bootstrap 4. I just tested and in Bootstrap it is working. What is the change in Bootstrap 4? Why .pull-right is not working in latest version of Bootstrap framework? Thanks... View Questions/Answers

bootstrap 4 float-right not working  July 29, 2018 at 3:20 AM
Hi, I am trying to align a div to right but its not working in Bootstrap 4. My code is: <div class="float-left">Float div to left</div><br> <div class="float-right">Float div to right</div><br> <div class="float-... View Questions/Answers

How do I get started with Bootstrap  July 29, 2018 at 2:02 AM
Hi, I am new to Bootstrap and want to learn it in. What all things I should know before starting Bootstrap? How do I get started with Bootstrap? Thanks ... View Questions/Answers

Bootstrap 4 button align right  July 29, 2018 at 12:31 AM
Hi, I am new to Bootstrap 4 and learning it from basics. There is requirement to align the text on left and align button on the right side in a div. What is the code for bootstrap 4 to create a button for align right? I want bootstrap 4 button align right code which is te... View Questions/Answers

How to create Bootstrap Hello World program  July 29, 2018 at 12:08 AM
Hello guys, I am beginner in Bootstrap and have experience in HTML/CSS based website design. Now due to popularity of Bootstrap I want to learn it. I want to start with the creation of Hello World Bootstrap program. How to create Bootstrap Hello World program? Than... View Questions/Answers

Installing Bootstrap 4 with bower  July 29, 2018 at 12:00 AM
HI, I am using Bower and want to install the Bootstrap 4 with bower? What are the steps for Installing Bootstrap 4 with bower? Thanks ... View Questions/Answers

mockmvc post json string  July 26, 2018 at 1:49 AM
Hi, I am writing Spring Test cases. I want to post json to webservice. How to post post json string in Spring testing using mockmvc? Thanks ... View Questions/Answers

how to get browser cookies in java  July 25, 2018 at 5:52 AM
Hi, How to get cookies in serverlet and then print? how to get browser cookies in java? Thanks ... View Questions/Answers

bootstrap affix only on desktop  July 22, 2018 at 8:12 PM
Hi, I am using bootstrap plugin to affix right navigation bar when user scrolls. But my problem is that the screen get fixed in the mobile/tablet screen also. I want the bootstrap affix only work on desktop screens. When my website is browsed on the mobile devices bootstrap affix ... View Questions/Answers

what is use of push in javascript  July 19, 2018 at 1:36 PM
HI, What is push method is JavaScript? I want to know its use with example. What is use of push in javascript? Thanks ... View Questions/Answers

JavaScript Iterate JOSN array.  July 18, 2018 at 6:41 AM
Hi, I have key value pair of key value in JSON object. How to iterate it? Thanks ... View Questions/Answers

swap two integer arrays  July 17, 2018 at 8:18 AM
int [] array1 = {1,2,3,4,5} int [] array2 = {6,7,8,9,10} how can we swap the values of bith integer arrays results like this array1 = {6,7,8,9,10} array2 = {1,2,3,4,5} ... View Questions/Answers

Who invented Blockchain technology  July 8, 2018 at 8:10 AM
Hi, I am wondering to find more about the Blockchain technology and the person put their mind in inventing Blockchain. Who invented blockchain technology? In want to know when it was invented and why? Thank ... View Questions/Answers

What is blockchain technology  July 8, 2018 at 7:52 AM
Hi, People are taking about Blockchain these days and there is many jobs in the IT field. So, I am wondering what is this? What is blockchain technology? Thanks ... View Questions/Answers

kibana specify elasticsearch url  July 5, 2018 at 7:59 AM
Hi, I have to connect to elasticsearch running on remote host from kibana application. What configuration changes needs to be done in kibana for this? How we can modify kibana configuration to specify elasticsearch url? Thanks ... View Questions/Answers

apache commons io 2.6 maven  July 3, 2018 at 6:09 AM
Hi, What is maven dependency of apache commons io 2.6 maven? Which code i should add in pom.xml to add apache commons io 2.6 in maven project? Thanks ... View Questions/Answers

apache commons fileutils maven dependency  July 2, 2018 at 11:24 PM
Hi, I am writing a program to for directory listing and want to add apache commons fileutils maven dependency. What is the maven code for this? Which code to add into pom.xml file to get apache commons fileutils maven dependency in my project. Thanks ... View Questions/Answers

Unable to locate package openjdk-11-jdk  June 29, 2018 at 11:45 PM
Hi, I want to install open jdk 11 on ubuntu with the following command: sudo apt install openjdk-11-jdk But its throwing error: [email protected]:~$ sudo apt install openjdk-11-jdk Reading package lists... Done Building dependency tree ... View Questions/Answers

Library corruption error during apt-get update  June 26, 2018 at 12:08 PM
Hi, I am running: sudo apt-get update but it is throwing error Library corruption error during apt-get update. Full error list: [email protected]lBox:~$ sudo apt-get update [sudo] password for deepak: Sorry, try again. [sudo] passw... View Questions/Answers

How specify the version of python that spark-submit uses  June 25, 2018 at 7:30 AM
Hi, I have installed python 3.7 and want to use with spark. How specify the version of python that spark-submit uses? Thanks ... View Questions/Answers

restart elasticsearch service centos  June 25, 2018 at 3:47 AM
Hi I have elasticsearch server on Centos. How to restart elasticsearch service centos? Thanks ... View Questions/Answers

installing jdk 10 on windows 10  June 19, 2018 at 4:07 AM
Hi, I have checked and found that Java 10 is released. Now looking for more information on JDK 10. I want to installing jdk 10 on windows 10. How to do it and configure it? Thanks ... View Questions/Answers

How important is Java Spring Framework currently  June 14, 2018 at 2:49 PM
Hi, Actually I want to know the importance of Spring Framework and todays context. How important is Java Spring Framework currently? How a beginner in Spring Framework learn this framework? Thanks ... View Questions/Answers

How can one master the Spring framework in Java  June 14, 2018 at 12:03 PM
Hi, How one can learn and master famous spring framework in Java? How can one master the Spring framework in Java? Almost all the IT Jobs involving Java required Spring framework in one or other way. I have seen many jobs on the Job website and most of them are looking for program... View Questions/Answers

What is the best site for advanced Java programming  June 14, 2018 at 11:32 AM
Hi, I am beginner in Java programming language. I have learned Java programming from a book and its difficult to type all the code of book and try. Now I am looking for best Java tutorials in Advanced Java programming so that learn it easily. It will be good if we have some ready ... View Questions/Answers

mapr db truncate table  June 12, 2018 at 4:58 AM
Hi, I want to truncate mapr db table. I have a JSON table with many records and application is in testing stage. How to truncate mapr JSON table? Thanks ... View Questions/Answers

change kerberos principal password  June 11, 2018 at 4:08 AM
How to change the password of a pricipal? My principal is abcd/mydomain.com What is the command of it? Thanks ... View Questions/Answers

How is Python and machine learning related to the IoT  June 3, 2018 at 6:32 PM
Hi, I just wanted to know the connection between Python, machine learning and IoT. How is Python and machine learning related to the IoT? Thanks ... View Questions/Answers

how to convert json into dataframe in scala  May 23, 2018 at 4:33 AM
Hi, I have a JSON string and I want to convert it to dataframe in scala. how to convert json into dataframe in scala? I am reading some program and creating one line json and now I want to convert it to dataframe in scala for spark. Thanks ... View Questions/Answers

How to check if ZooKeeper is running or up from command prompt  May 23, 2018 at 12:28 AM
Hi, I want to see if the ZooKeeper is running or not on my Hadoop cluster. How to check if ZooKeeper is running or up from command prompt? Thanks ... View Questions/Answers

what is etc profile file in Linux  May 21, 2018 at 12:29 AM
Hi, I want to know more about the /etc/profile file in Linux. What is the use of /etc/profile file? Thanks ... View Questions/Answers

rename index in elasticsearch  May 18, 2018 at 1:17 AM
How to rename index in elasticsearch? I have an index with millions of records in it. I want to rename this index to another name. There is some business requirement to rename it. What is the command to rename index in elasticsearch? I am using Elasticsearch 6.1. Thanks... View Questions/Answers

how to get number of shards in elasticsearch  May 17, 2018 at 1:36 AM
Hi, I have elastic search server and I want to get the details of shards for each index. how to get number of shards in elasticsearch? Thanks ... View Questions/Answers

list of all months between two dates in java  May 16, 2018 at 6:43 AM
Hi, I want to get list of all months with year between two dates. How to do this in Java? Thanks ... View Questions/Answers

hadoop_home or hadoop.home.dir are not set eclipse  May 16, 2018 at 12:50 AM
Hi, I am running an application in Eclipse. I have set HADOOP_HOME correctly in Ubuntu and can see the values with the command: echo $HADOOP_HOME But eclipse is not detection it and throwing following error: ... View Questions/Answers

google gson maven dependency 2.8.2  May 12, 2018 at 9:42 AM
Hi, I want to use the latest google gson api in my project. What is google gson maven dependency for version 2.8.2? ... View Questions/Answers

java programming  May 11, 2018 at 3:25 PM
Companies and people often buy and sell stocks. Often they buy the same stock for different prices at different times. Say a person owns 1000 shares a certain stock (such as Checkpoint) she may have bought the stock in amounts of 100 shares over 10 different times with 10 different prices. ... View Questions/Answers

Java Hashmap  May 7, 2018 at 12:44 PM
Java code for below: Any help is appriciated A text file consisting of output of (vid, cid) pairs is given. Suppose that vid is a 6-digit integer and cid is a 3-digit integer. Implement the following methods for a class named eC. You must use the Hash table AD... View Questions/Answers

Add jars to a Spark Job spark-submit  May 1, 2018 at 4:34 AM
Add jars to a Spark Job spark-submit I want to submit some dependency jars along with the code jar file with spark-submit. How to add jar to the Spark Job Submit process? Thanks ... View Questions/Answers

Hibernate ORM 5.2 release date  April 30, 2018 at 12:52 PM
Hi, I was out of touch from Hibernate programming for last 2 years. Earlier I was working on Hibernate 3 and now new project came in my company. I have to work on this new project which is using latest version of Hibenate. Which is the latest version of Hibernate? What is ... View Questions/Answers

What is a Big Data Hadoop consultant  April 30, 2018 at 10:28 AM
Hi, What is a Big Data Hadoop consultant? What are there role? Thanks ... View Questions/Answers

Will Spark overtake Hadoop  April 30, 2018 at 10:06 AM
Hi, Will Spark overtake Hadoop? Spark is very popular and much faster then MapReduce. So, can it replace Hadoop? Thanks ... View Questions/Answers

What is the equivalent of MapReduce reducer in spark  April 30, 2018 at 9:58 AM
Hi, What to use for MapReduce in Spark? What is the equivalent of MapReduce reducer in spark? Thanks ... View Questions/Answers

What makes Spark faster than MapReduce?  April 30, 2018 at 9:49 AM
Hi, What makes Spark faster than MapReduce? Thanks ... View Questions/Answers

What is RDD in spark  April 30, 2018 at 9:13 AM
Hi, I am new to Spark programming and when I started learning i encountered RDD first. What is RDD in spark? Thanks ... View Questions/Answers

is rdd mutable  April 30, 2018 at 9:09 AM
Hi, I am new to Spark programming and I am not able to see any way to modify the data of RDD. is rdd mutable? Thanks ... View Questions/Answers

how to create rdd in pyspark  April 30, 2018 at 9:03 AM
Hi, I am have to create an RDD from a String in PySpark. How to do this? How to create rdd in pyspark? ... View Questions/Answers

hibernate 5.3 0 maven dependency  April 30, 2018 at 1:39 AM
Hi, What is dependency of hibernate 5.3 0 which i can add to pom.xml file? Thanks ... View Questions/Answers

how to install anaconda in ubuntu for all users  April 28, 2018 at 11:38 PM
Hi, I want to install anaconda for all users in Ubuntu. how to install anaconda in ubuntu for all users? Thanks ... View Questions/Answers

how to install anaconda in ubuntu  April 28, 2018 at 11:03 PM
Hi, I have to use Ubuntu to python programming and decided to use Anaconda distribution of Python. I want to now install Anaconda Python on Ubuntu and trying to find steps to do it. how to install anaconda in ubuntu? Thanks ... View Questions/Answers

spark-core_2.11 maven dependency  April 27, 2018 at 10:26 AM
Hi, I want to create Spark Application and need maven dependency to add into pom.xml file of the project. Where can I find spark-core_2.11 maven dependency jar files? What is the way to add spark-core_2.11 maven dependency in my project? Thanks ... View Questions/Answers

how to modify hosts file in ubuntu  April 26, 2018 at 5:44 AM
Hi, I want to add few host names with ip address in Ubuntu. how to modify hosts file in ubuntu? Thanks ... View Questions/Answers

yarn.scheduler.minimum-allocation-mb  April 26, 2018 at 4:39 AM
Hi, I am submitting an Java Spark job on yarn cluster. It is throwing error: Can't allocate enough ram as it outside max allowed. yarn.scheduler.minimum-allocation-mb How to solve this? Thanks ... View Questions/Answers

float to np.floating is deprecated  April 12, 2018 at 11:38 PM
Hi, I running one program and there is warning message "float to np.floating is deprecated". Error is: C:\Users\test\Anaconda3\envs\tensorflow\lib\site-packages\h5py\__init__.py:36: FutureWarning: Conversion of the second argument of issubdtype from `... View Questions/Answers

How to install TensorFlow TF-Hub  April 12, 2018 at 11:21 PM
Hi, How I can install TensofFlow TF-Hub? Thanks ... View Questions/Answers

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