Tutorials Archives | Page 3 of 30 | 800+ Java & Big Data Interview Q&As

Blog Archives

« 1 2 3 4 5 6 7 … 30 »

01: Scala Actors tutorial step by step

This assumes that you have set up Scala as per Setting up Scala IDE & using Maven plugins for Java developers.

Step 1: Add the “scala-actors” dependency to the pom.xml file.



   <properties>
		<maven.compiler.source>1.8</maven.compiler.source>
		<maven.compiler.target>1.8</maven.compiler.target>
		<encoding>UTF-8</encoding>
		<scala.version>2.11.6</scala.version>
		<scala.specs.version>2.11</scala.specs.version>
	</properties>

    <dependencies>
	    <dependency>
			<groupId>org.scala-lang</groupId>
			<artifactId>scala-library</artifactId>
			<version>${scala.version}</version>
		</dependency>
		
        <dependency>
			<groupId>org.scala-lang</groupId>
			<artifactId>scala-actors</artifactId>
			<version>${scala.version}</version>
		</dependency>
		
		//.......
	<dependencies>

<maven.compiler.source>1.8</maven.compiler.source>

<maven.compiler.target>1.8</maven.compiler.target>

<scala.version>2.11.6</scala.version>

<scala.specs.version>2.11</scala.specs.version>

</properties>

<groupId>org.scala-lang</groupId>

<artifactId>scala-library</artifactId>

<version>${scala.version}</version>

</dependency>

<groupId>org.scala-lang</groupId>

<artifactId>scala-actors</artifactId>

<version>${scala.version}</version>

</dependency>

//.......

Step 2: Scala’s primary concurrency construct is an actor.

…

01: Simple Akka tutorial in Java step by step

Why use Akka? Akka handles all of the underlying threading complexities by allowing you to just focus on dividing your tasks into actors, defining messages to pass among actors, and wiring together their communication logic.

The real power of Akka is realized when you distribute actors across multiple machines.

…

01: Simple Akka Tutorial in Scala step by step for the Java developers

Simple Akka Tutorial in Scala step by step with Maven. This is reactive programming in action, which is used for message driven interactions. This extends setting up Scala and Simple Akka tutorial in Java step by step

Step 1: Create a scala maven project named “

…

01: Simple Spring Boot Tutorial in 8 steps

Assumes that your Java, Maven, and eclipse are set up as per: Setting up Java, Maven, and eclipse

Step 1: Create a simple maven project using the maven “archetype” plugin.

mvn archetype:generate -DgroupId=com.mytutorial -DartifactId=simple-spring-boot -DinteractiveMode=false

1 2	mvn archetype:generate -DgroupId=com.mytutorial -DartifactId=simple-spring-boot -DinteractiveMode=false

The above command creates a folder “simple-spring-boot”

…

01: Spark RDD joins in Scala tutorial

This tutorial extends Setting up Spark and Scala with Maven.

Step 1: Let’s take a simple example of joining a student to department. This will be written in an SQL world as:


SELECT s.name, d.name 
FROM Student s
JOIN Department d on s.deptId = d.id

SELECT s.name, d.name

FROM Student s

JOIN Department d on s.deptId = d.id

Step 2: Let’s create classes to represent Student and Department data.

…

01: Spark tutorial- writing a file from a local file system to HDFS

This tutorial assumes that you have set up Cloudera as per “cloudera quickstart vm tutorial installation” YouTube videos that you can search Google or YouTube. You can install it on VMWare (non commercial use) or on VirtualBox. I am using VMWare. Cloudera requires at least 8GB RAM and 16GB is...

This content is for 30-Day-Full-Access, 100-Day-Full-Access, 200-Day-Full-Access, and 365-Day-Full-Access members only. Register 80+ Free Java FAQs 80+ Free Big Data FAQs

Already a member? Log in here

01: Websphere MQ Client API Tutorial – Message Sender

Step 1: You need to have the Webspeher MQ client jar “com.ibm.mq.allclient.jar” in your project at “${basedir}/lib”. You can refer to it via Maven as a local file based repository.


<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

	//.....
		
    	<properties>
		    <maven.compiler.source>1.7</maven.compiler.source>
		    <maven.compiler.target>1.7</maven.compiler.target>
		    <mq-client.version>8.0.0.0</mq-client.version>
		</properties>

		<repositories>
		    <repository>
			   <id>localrepository</id>
			   <url>file://${basedir}/lib</url>
		    </repository>
		</repositories>
		
		<dependencies>
            <!-- Websphere MQ Implementation -->
		    <dependency>
			    <groupId>com.ibm.mq</groupId>
			    <artifactId>allclient</artifactId>
			    <version>${mq-client.version}</version>
		    </dependency>
		
		    //.....
		
		</dependencies>
</project>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

//.....

<maven.compiler.source>1.7</maven.compiler.source>

<maven.compiler.target>1.7</maven.compiler.target>

<mq-client.version>8.0.0.0</mq-client.version>

</properties>

<id>localrepository</id>

<url>file://${basedir}/lib</url>

</repository>

</repositories>

<artifactId>allclient</artifactId>

<version>${mq-client.version}</version>

</dependency>

//.....

</dependencies>

</project>

Step 2: Use the “Websphere MQ API” to send a “MQMessage”

…

01. Setting up Java step by step tutorial

This is mainly for the beginners of Java to get started with Maven, and eclipse. This is required not only for learning Java, but also conducive to creating your self-taught Java projects.

Set up folders

1) C:\tools to install Java development tools like JDK,

…

01. Setting up Scala & practicing the concepts via REPL the Scala way for Java developers

Scala runs on the JVM, so Java and Scala stacks can be freely mixed. You can call Java libraries from Scala. Having said this, it is very important that you learn to write code the Scala way, and Not Java way. Currently, Java programmers with Scala experience are paid more and in demand.

…

01. ⏯ Setting up Java step by step video tutorial

01a: Convert XML file To Sequence File – writing & reading – Local File System

Sequence files are good for saving raw data into HDFS. Sequence files are compressible and splittable. It is also useful for combining a number of smaller files into a single say 64MB or larger sequence file as HDFS is more suited for larger files. … Read more ›...

This content is for 30-Day-Full-Access, 100-Day-Full-Access, 200-Day-Full-Access, and 365-Day-Full-Access members only. Register 80+ Free Java FAQs 80+ Free Big Data FAQs

Already a member? Log in here

01A: Spark on Zeppelin – Docker pull from Docker hub

Pre-requisite: Docker is installed on your machine for Mac OS X (E.g. $ brew cask install docker) or Windows 10. Docker interview Q&As.

What is Apache Zeppelin?

Zeppelin is a web based notebook to execute arbitrary code in Scala, SQL, Spark, etc. You can mix languages.

…

01a: ⏯ JDBC with MySQL Beginner Video Tutorial

Related Links 1. JDBC with MySQL Beginner Tutorial Step by Step. Extends ⏯ MySQL database beginner video tutorial JDBC Interview Q&As 1. 12 FAQ JDBC interview questions and answers. 2. JDBC Overview Interview Questions and Answers. … Read more ›...

This content is for 30-Day-Full-Access, 100-Day-Full-Access, 200-Day-Full-Access, and 365-Day-Full-Access members only. Register 80+ Free Java FAQs 80+ Free Big Data FAQs

Already a member? Log in here

« 1 2 3 4 5 6 7 … 30 »

Blog Archives

01: Scala Actors tutorial step by step

01: Simple Akka tutorial in Java step by step

01: Simple Akka Tutorial in Scala step by step for the Java developers

01: Simple Spring Boot Tutorial in 8 steps

01: Spark RDD joins in Scala tutorial

01: Spark tutorial- writing a file from a local file system to HDFS

01: Websphere MQ Client API Tutorial – Message Sender

01. Setting up Java step by step tutorial

01. Setting up Scala & practicing the concepts via REPL the Scala way for Java developers

01. ⏯ Setting up Java step by step video tutorial

01a: Convert XML file To Sequence File – writing & reading – Local File System

01A: Spark on Zeppelin – Docker pull from Docker hub

01a: ⏯ JDBC with MySQL Beginner Video Tutorial

300+ Java Interview Questions - FAQs

10+ Companion Techs Interview Q&As

300+ Big Data Interview Questions - FAQs

16+ Java Tech Key Areas Interview Q&As

Your Career Tips to go places

Tutorials on Java & Big Data

300+ Java Interview Questions Answered

Disclaimer