SrcCodes

Demo: Apache Log4j2 Vulnerability | CVE-2021-45046 | CVE-2021-44228 | CVE-2021-45105 | Mitigation

Fri, 10 Dec 2021 20:14:00 GMT

Now, most Java developers are busy mitigating Apache Log4j2 Vulnerability (CVE-2021-44228 and CVE-2021-45046). Applications are literally on fire. Here, I have created a sample project using Spring Boot and Log4j2 to demonstrate (Video Demo) the vulnerability and possible remediation. Please take a

How to Install Windows Subsystem for Linux (WSL2) on Windows 10?

Thu, 26 Aug 2021 06:11:51 GMT

Windows Subsystem for Linux (WSL) is an awesome feature of Windows 10. No more VMware or Oracle VirtualBox is required to run Linux on Windows. WSL is faster and less resource consuming, zero or less configuration compared to any other traditional Virtual Machines (VM). Installation and setup of Lin

Scrum Master - A Leader who Serves

Mon, 16 Aug 2021 19:42:33 GMT

The launch of the 2020 version of the Scrum Guide reimagined the role of the Scrum Leader. Servant-leader a term that had become synonymous with the role of a Scrum Master was coined by Robert Greenleaf in his essay published in 1970. > A servant-leader focuses primarily on the growth and well-bei

How to change hostname on Ubuntu running on Windows WSL?

Tue, 13 Jul 2021 17:48:55 GMT

If you are running Ubuntu on Windows WSL (Windows Subsystem for Linux) and wondering how to change hostname permanently then follow all steps mentioned below. Once hostname is changed, if you get "unable to resolve host : Name or service not known" then follow the step #4 for the fix. Vi

Scrum Guide - November 2020 version - Updates you can't miss

Sun, 02 May 2021 20:47:43 GMT

Ever since the November 2020 version was released, I had been curious about the what's and why's of the changes that were made to the July 2017 version. Whether we choose to drop the term "servant-leader" (to describe a Scrum Master) from our vocabulary is altogether a different (and contentious) co

Got My Scrum Certifications. What's Next?

Fri, 02 Apr 2021 03:36:24 GMT

Let me begin by congratulating you for securing the Scrum certification! But I hope you realize that a certification simply validates your awareness about the guiding concepts and theories. It is not a living proof of your actual ability to bring those thoughts to life. So, how do you build your

PSPO I Certification - Preparation Strategies and Tips

Mon, 22 Mar 2021 01:56:20 GMT

There are many reasons why one would want to become a Professional Scrum Product Owner. An IT professional working as a part of a Scrum Team, in the scope of a Business Analyst, might decide to transition to the role of a Product Manager/ Product Owner, while a person not from the industry might use

PSM I Certification - Preparation Strategies and Tips

Sun, 14 Mar 2021 20:30:39 GMT

There are many reasons why one would want to become a Professional Scrum Master. An IT professional working as a part of a Scrum Team might decide to transition to the role of a Scrum Master, while a person not from an IT background might use this as a foothold to join the IT industry. Once you deci

Breach COMB List 3.2B - Mine got exposed. Check yours.

Sat, 20 Feb 2021 22:15:00 GMT

"No News is Good News". That is what I used to get from Identity Guard®. But yesterday, I got email & sms notification "Alert: Your Login Credentials Have Been Exposed Online". And partial password shared in that notification is actually matching with my credentials. So, mine got exposed. Check your

[SOLVED] How to Add Quick Properties in Techsmith Camtasia 2020 | Reusable Assets, Group & Template

Mon, 25 Jan 2021 17:50:28 GMT

Techsmith Camtasia 2020 introduces a video template. Now, we can create a video template and share it with the team to build consistent and professional videos quickly. This is really great. But like many Camtasia users, I also terribly miss the feature to add Quick Properties to the custom groups,

Exception: Falling with style. Error: Failing with smile

Fri, 01 Jan 2021 01:46:15 GMT

Andy learning to code. He seemed a little worried. Mike happens to stop by. "You seem worried. What’s on your mind?" asked Mike. "Well Mike, I’ve been trying to understand exception handling. But I can’t seem to wrap my head around it." answered Andy. Mike laughed and said "I see. Come with me.

gyp: No Xcode or CLT version detected - ERR! configure error in macOS Catalina

Wed, 26 Aug 2020 21:28:38 GMT

Is node-gyp (Node.js native addon build tool) failing during yarn install or npm install? If your macOS got upgraded to Catalina (10.15) recently, then you will find the fix right here.

Customize Logback Configuration for Log Optimization

Wed, 12 Aug 2020 16:12:29 GMT

4,153,406 hits in single day! Sounds like a really big number for many of us. I was surprised when I noticed this in Production ELK for the first time. I didn't expect that many hits for an application with only 5 microservices. That too for a Beta application with a handful (~2k) of users. It wil

Top 6 characteristics of a successful entrepreneur

Tue, 11 Aug 2020 22:22:32 GMT

Entrepreneurs are not a homogeneous group and hence attributing their success or failure to a set of characteristics might be difficult as well as open to challenges. People often have the notion that entrepreneurs are born with their natural affinity to innovation and an appetite for risk taking.

Pandemic in Application - Circuit Breaker Pattern

Sun, 09 Aug 2020 06:36:00 GMT

Pandemic! Human race is now at stake. Flatten the curve. Whole world is running after this epidemic curve. Why it so important? [https://commons.wikimedia.org/wiki/File:20200403_Flatten_the_curve_animated_GIF.gif#/media/File:20200403_Flatten_the_curve_animated_GIF.gif] By RCraig09 [//commons.wik

Kid's Eye and Energy Safe Smart TV - Part 2

Thu, 09 Jul 2020 18:28:04 GMT

Sometimes I feel, kids do this just to irritate us. Or may be, we always have a prioritized list of problems in our subconscious mind. When we solve the top one, the next one pops up and gets highlighted. It is indeed never ending. Few extra hours of running TV will hardly make any difference in m

Kid's Eye Safe Smart TV - Part 1

Sat, 20 Jun 2020 02:00:19 GMT

Outside of home COVID-19. Inside at home COVID-16. Whole world is fighting against COVID-19. But for COVID-16, I am all alone. I am tired of saying "please stay away from the screen". So thought of this concept project to avoid brain infection at home. By the way, I call two of my kids (age 1 and 6

Log Forging by CRLF Injection

Thu, 11 Jun 2020 02:51:50 GMT

Live feed forging formed the base of the Professor's "Paris Plan" to rescue Lisbon from police custody in Money Heist (Season 4). A smart attacker always makes or covers up his tracks by forging something. Cyber-attacks inflict loss of reputation and wealth worth millions.

Secure your Web Application using HTTP Security Headers - Cloudflare Workers

Sun, 07 Jun 2020 07:10:20 GMT

Security is always an essential aspect of any web application. HTTP security headers play an important role to tighten up the security of web application. It acts as an additional security layer to defend many common vulnerabilities and attacks like clickjacking, cross-site scripting (XSS), cross-s

Internet enabled (IOT) smoke alarm with SMS notification using esp8266, MQ2, ThingSpeak and Twilio

Mon, 04 Sep 2017 18:34:00 GMT

ESP8266 based Internet enabled (IOT) smoke and fire alarm to send SMS notification (Twilio) and to trigger alarm with flashing red LED if it detects smoke and leakage of combustible gas using MQ2 gas sensor. Also ThingSpeak analytics is a great bonus.

IOT - Home Automation project using Geofencing, MQTT, ESP8266 and MycroPython

Mon, 08 May 2017 07:12:00 GMT

A home automation project that maps switching on/off of appliances with your entry/exit of a geofence (virtual perimeter for a real-world geographic area). Step into a cool room without having to wait for the air conditioning to start functioning? Watch the garage door open as you drive in.

Home Automation - Internet of Things - MQTT (MQ Telemetry Transport), ESP8266 and MycroPython

Wed, 22 Mar 2017 04:00:00 GMT

This is my first post on home automation. As a 'Hello World' project, switching on/off a bulb is a common use case. This post is not an exception. But to spice it up, we'll use MQTT (MQ Telemetry Transport) - a machine-to-machine (M2M)/Internet of Things (IOT) connectivity protocol and an android ap

Configure STA_IF interface of ESP8266 (MycroPython firmware) to connect with WIFI network automatically on boot

Tue, 14 Mar 2017 07:06:00 GMT

ESP8266 can act as both Station / WIFI client (STA_IF interface) and Access Point (AP_IF interface). AP_IF interface is active by default in MycroPython firmware on ESP826 . In the earlier post, we connected to the access point (AP mode) of ESP8266 and used WebREPL to remotely control switch on/off

Example: Remotely switch on/off and control brightness of an LED using MicroPython WebREPL

Wed, 08 Mar 2017 06:49:00 GMT

So far, we have flashed MicroPython firmware onto an ESP8266 and setup WebREPL to run programs over WIFI on the chip. Now it's time for a hands-on excercise. We'll remotely switch on/off and control brightness of an LED using MicroPython WebREPL.

How to setup WebREPL to connect to Python prompt (REPL) of ESP8266 over WIFI network?

Thu, 23 Feb 2017 07:05:00 GMT

WebREPL daemon auto-start is disabled by default in MycroPython on ESP8266 for security reason. Here, we'll enable the same, connect to the REPL over WIFI using locally installed WebREPL client and run a "Hello World" program remotely on the chip.

How to flash MicroPython firmware onto an ESP8266 ESP-12E chip using esptool?

Sat, 04 Feb 2017 17:01:00 GMT

By default, ESP8226 module comes with AT Firmware. In this post, we'll see how to flash MicroPython firmware onto an ESP8266 ESP-12E chip using esptool. Tools,Technologies and Components used in this article 1. ESPlorer IDE [https://esp8266.ru/esplorer/#download] 2. MicroPython [https://micropyth

How to uninstall OpenCV (Open Source Computer Vision) from Raspberry Pi - Raspbian Jessie?

Sun, 10 Jul 2016 07:08:00 GMT

To uninstall OpenCV (Open Source Computer Vision) from Raspberry Pi (Raspbian Jessie), follow the steps mentioned below in this article.

Troubleshooting for Hue-Solr Integration

Thu, 18 Jun 2015 16:14:00 GMT

Troubleshooting: Cloudera Hue not able to access Solr collections through Search tab assuming both are set up with CDH4.

4 Effective Tips to Reduce Your WordPress Database Size

Sat, 13 Jun 2015 19:09:00 GMT

Are you serious about speeding up your WordPress-hosted website? If so, chances are high that you have shelled out money for clutter-free codes or designs that will reduce your site's loading time. If you are like most Webmasters, you have eagerly devoured webinars, eBooks, and worksheets that teach

NRT (Near Real Time) Indexing using Cloudera Search And Lily HBase Indexer

Tue, 19 May 2015 04:00:00 GMT

You are not so strong with SQL or you are not good at programming? And you need to create distributed scalable search on a very large dataset stored in HBase? And you need to achieve NRT (Near Real Time) indexing? Cloudera search along with Lily Hbase Indexer is there to rescue you! Goal of Documen

Cloudera Hadoop (CDH 5.x) Installation Guide

Sun, 10 May 2015 18:04:00 GMT

It is affectionately said that what Oracle is to Relational Database, Cloudera is to Hadoop. Most of the Hadoop aspirants, at the beginning of their Hadoop development learning curve, fiddle with the setting up of CDH, some able to do it smoothly (Cloudera has put up an incredibly exhaustive install

Hadoop Hands on - A POC Covering HDFS API, MapReduce, JSON and AVRO SerDe, HBase API With FuzzyRowFilter usage

Mon, 13 Apr 2015 04:00:00 GMT

My learning phase with Hadoop is still continuing. During this phase what I found is a great lack of a comprehensive POC which covers at least a few prominent Hadoop technologies. My POC can fill up that void. After having set up CDH4.7 in my laptop, I completed implementation of this POC touching H

Install and Configure Oracle Java ME Embedded on Raspberry Pi

Tue, 17 Mar 2015 14:14:00 GMT

Raspberry Pi is a low cost, credit-card sized and fastest selling personal computer. In this article, we'll install and configure Oracle Java ME Embedded on a Raspberry Pi. > What is a Raspberry Pi? The Raspberry Pi is a low cost, credit-card sized computer that plugs into a computer monitor or TV,

Design - a start-up approach to adopt developers' language

Thu, 12 Mar 2015 05:15:00 GMT

I have to observe lots of developers as part of my job description. I sit back and stare at what they do all the time, how they communicate to each other, how they express their ideas and how easily they get into a fight in a design discussion. As per my experience, 80% of the design meetings do no

Cucumber Quick Start Guide

Wed, 14 May 2014 18:18:00 GMT

I have been told that, medically, Cucumber can cause indigestion. Let's see... What is Cucumber? Cucumber is a testing framework that helps to bridge the gap between software developers and business managers. Tests are written in plain language based on the behavior-driven development (BDD) style o

Build, Install and Configure Eclipse Plugin for Apache Hadoop 2.2.0

Wed, 23 Apr 2014 04:00:00 GMT

Apache Hadoop Development Tools (HDT) [https://hdt.incubator.apache.org/] is still in development phase. So, no official distribution of Hadoop 2.2.0 Eclipse Plugin is available now. But we can build the same using winghc/hadoop2x-eclipse-plugin [https://github.com/winghc/hadoop2x-eclipse-plugin].

Shell$ExitCodeException - Caused by: java.lang.NoClassDefFoundError: org/apache/hadoop/service/CompositeService

Fri, 28 Feb 2014 21:21:00 GMT

If you are getting "Exception from container-launch:org.apache.hadoop.util.Shell$ExitCodeException" in FAILED application's Diagnostics (or Command prompt) and "java.lang.NoClassDefFoundError: org/apache/hadoop/service/CompositeService" in 'stderr' containerlogs while running any Hadoop example on

Run Hadoop Wordcount MapReduce Example on Windows

Mon, 03 Feb 2014 05:00:00 GMT

In this post, we'll use HDFS command 'bin\hdfs dfs' with different options like mkdir, copyFromLocal, cat, ls and finally run the wordcount MapReduce job provided in %HADOOP_HOME%\share\hadoop\mapreduce\hadoop-mapreduce-examples-2.2.0.jar. On successful execution of the job in the Single Node (ps

AttachNotSupportedException: Unable to enqueue operation: the target VM does not support attach mechanism

Fri, 10 Jan 2014 05:00:00 GMT

Following exception occurs in Windows for IBM JDK 6 while executing a JUnit testcase which uses JMockit framework, in-spite of enabling the Attach API " -Dcom.ibm.tools.attach.enable=yes" - java.lang.RuntimeException: com.sun.tools.attach.AttachNotSupportedException: Unable to enqueue operation: th

Maven Build Failure - Hadoop 2.2.0 - [ERROR] class file for org.mortbay.component.AbstractLifeCycle not found

Sun, 22 Dec 2013 06:39:00 GMT

In the previous post on Build, Install, Configure and Run Apache Hadoop 2.2.0 in Microsoft Windows OS [/build-install-configure-run-apache-hadoop-2-2-0-microsoft-windows-os], many people have encountered Maven build failure issue ("[ERROR] class file for org.mortbay.component.AbstractLifeCycle not f

Configure SSL/HTTPS support on Apache Tomcat 7

Wed, 27 Nov 2013 08:17:00 GMT

By default, HTTPS / SSL is not configured and enabled in Tomcat Web server. SSL setup is required to make your web application accessible over HTTPS protocol. This post will guide you to configure SSL in Tomcat 7 Web server. Tools and Technologies used in this article : 1. Tomcat 7.0.47 [https://t

Get Redirections of a URL using Apache HttpComponents HttpClient

Mon, 25 Nov 2013 05:00:00 GMT

Many websites use URL redirection technique to forward the original request from one location to another several times for different reasons (Domain forwarding, URL shortening, Privacy protection, Maintaining similar domain names referring single website, etc.). In this post, I'll try to demonstrate

Determine Click Position (Row and Column Number) on click of a table cell

Sun, 24 Nov 2013 05:00:00 GMT

This example shows how to determine click position (row and column number) on click of a table cell using jQuery.

ERROR util.Shell: Failed to locate the winutils binary in the hadoop binary path

Sun, 03 Nov 2013 08:20:00 GMT

If we directly take the binary distribution of Apache Hadoop 2.2.0 release and try to run it on Microsoft Windows, then we'll encounter ERROR util.Shell: Failed to locate the winutils binary in the hadoop binary path.In the previous post - Build, Install, Configure and Run Apache Hadoop 2.2.0 in Mic

Build, Install, Configure and Run Apache Hadoop 2.2.0 in Microsoft Windows OS

Sun, 03 Nov 2013 05:56:00 GMT

Good news for Hadoop developers who want to use Microsoft Windows OS for their development activities. Finally Apache Hadoop 2.2.0 release officially supports for running Hadoop on Microsoft Windows as well. But the bin distribution of Apache Hadoop 2.2.0 release does not contain some windows nativ

Expand Shortened Link using Java

Tue, 22 Oct 2013 04:00:00 GMT

Nowadays we use different URL shortening services (like bit.ly [https://bit.ly/] , TinyURL [https://tinyurl.com/], Google URL Shortener [https://goo.gl/] etc.) to shorten long URL to fit in micro-blogging sites (like Twitter [https://twitter.com/]), to beautify a link, view analytics on link clicks,

Spring Security HTTP Basic Authentication Example

Mon, 09 Sep 2013 04:00:00 GMT

HTTP basic authentication (BA) is a simple authentication mechanism. When a web client requests any secured web resources, server sends an HTTP response with status code 401 (Unauthorized) and WWW-Authenticate HTTP header like WWW-Authenticate: Basic realm="realm here". And browser pops up a login

Spring Security Custom Login Form Example

Thu, 05 Sep 2013 04:00:00 GMT

In previous posts Spring Security 3 Hello World Example [/spring-security-3-hello-world-example] and Spring Security Logout Example [/spring-security-logout-example], we have used default login form generated by Spring Security framework. Now we'll set up a custom login form for authentication with

Problem: failed to create task or type eclipse.refreshLocal

Fri, 30 Aug 2013 05:32:00 GMT

Eclipse platform provides different useful Ant tasks [https://help.eclipse.org/indigo/index.jsp?topic=/org.eclipse.platform.doc.isv/guide/ant_eclipse_tasks.htm] to interact with the workspace. If you have added any such Ant task (say eclipse.refreshLocal) in your ant build script and started getti

Integrate Free Anti-Bot Service reCAPTCHA with Spring MVC application

Mon, 05 Aug 2013 04:00:00 GMT

reCAPTCHA is a free CAPTCHA service to protect a site against spam and other types of automated abuse by bots or computer programs. reCAPTCHA provides widget which can easily be integrated to your blog, forum, comment, registration form, contact form, etc and you can be rest assured that only human

Spring Security Logout Example

Wed, 17 Jul 2013 04:00:00 GMT

Spring Security provides Logout Handling Service for logging out by navigating to a particular URL (by default /j_spring_security_logout). LogoutFilter [http://static.springsource.org/spring-security/site/docs/3.1.x/apidocs/org/springframework/security/web/authentication/logout/LogoutFilter.html] s

Spring 3 Hello World Example / Tutorial using Maven Tool and Eclipse IDE

Thu, 11 Jul 2013 21:17:00 GMT

This tutorial will help you to write your first Hello World Spring program. We will use Maven tool to generate the project and Eclipse IDE to implement a method which will print 'Hello World!' in the console.

Spring Security 3 Hello World Example

Thu, 11 Jul 2013 04:00:00 GMT

Security is of great concern in any web application. If you are looking for a proven and industry standard solution to secure your Java/J2ee based application, then widely used and highly customizable authentication and access control framework - Spring Security is well worth considering. This post

Build Hadoop Eclipse Plug-in Jar From Source Code And Install That Plug-in In Eclipse IDE

Sat, 22 Jun 2013 04:00:00 GMT

Hadoop Eclipse plug-in (installed in Eclipse IDE or Spring Tool Suite) eases the experience of Map/Reduce on Hadoop. Hadoop distribution does not include Hadoop Eclipse plug-in jar, but includes source code of that plug-in. In this post, we'll see all the steps to build Hadoop eclipse plug-in from s

Spring Asm Dependency Issue: java.lang.IncompatibleClassChangeError - Fixed

Mon, 10 Jun 2013 04:00:00 GMT

If you have migrated / upgraded your project to Spring Framework 3.2 and project builds successfully but when application starts, you are getting IncompatibleClassChangeError, then this post will help you to resolve the same.

Get started with Open Source Code Quality Management Platform - Sonar in few minutes

Tue, 14 May 2013 01:19:00 GMT

Sonar is an open source platform for code quality management. It covers different aspects of code quality management like code duplication, complexity, coverage by unit tests, architecture & design, rule based defect identification etc.

Make HTML table sortable using jQuery Tablesorter plugin

Tue, 30 Apr 2013 04:00:00 GMT

This post describes how to make an HTML table (having THEAD and TBODY) sortable in few minutes using tablesorter jQuery plugin. This plugin can parse and sort many types of data like number, text, currency, URI, IP address, date, time including linked data in a table cell.

Setup, Run and Experience Chromium OS in Oracle VM VirtualBox before you buy Google's Chromebook

Sun, 31 Mar 2013 04:00:00 GMT

Are you planning to buy a Google's Chromebook? Want to experience how it looks like before you decide? Then this is the post worth looking into. Here we'll see how to setup, run and explore Chromium OS in Oracle VM VirtualBox.

Spring Mobile Hello World Example that includes DeviceResolver, SitePreference, urlPath SiteSwitcher and LiteDeviceDelegatingViewResolver

Sun, 17 Feb 2013 05:00:00 GMT

Spring Mobile is an extension to Spring MVC for development of mobile web applications. The Spring Mobile Device module provides a feature (DeviceResolver / LiteDeviceResolver) to detect devices like mobile and tablet in the server side. Device aware view management is very useful specially when it

Spring 3 MVC Framework Based Hello World Web Application Example Using Maven, Eclipse IDE And Tomcat Server

Tue, 08 Jan 2013 18:28:00 GMT

In this post, we'll see how to get started with a Spring Web model-view-controller (MVC) framework based Hello World web application in few steps.

Build Android application package file (APK) using Eclipse IDE and Android Developer Tools (ADT) Plugin

Sat, 15 Dec 2012 19:04:00 GMT

Android application package file (APK) is program binary used to distribute and install Android application onto the Android operating system. Here we'll see step by step procedure of creating .apk file ready to be installed in Android device.

Android Hello World Example using Eclipse IDE and Android Developer Tools (ADT) Plugin

Fri, 07 Dec 2012 05:00:00 GMT

This tutorial will help you to write your first Android 'Hello World!' program. Here, we'll use Eclipse IDE with Android Developer Tools (ADT) plugin to build the application and Android Emulator - Android Virtual Device (AVD) to run the application which will draw 'Hello World!' text on the screen.

Logback using SLF4J Hello World Example

Wed, 21 Nov 2012 06:10:00 GMT

Logback is an increasingly popular logging framework intended as a successor to the popular log4j project. It is designed by the founder of log4j. Logback offers many advantages over log4j like faster, smaller memory footprint, automatic reloading of configuration files, automatic compression of arc

Java File and Directory operations made easy in JDK 7

Wed, 07 Nov 2012 05:00:00 GMT

Here we'll see two examples - Copy operation & Traversing a file tree. If you have already worked using JDk 6 or earlier versions then you can see how easy it is to use JDK 7's nio package. And you need to write less code to implement the same. This tutorial shows two examples on the file IO mechan

org.springframework.aop.framework.AopConfigException: Cannot proxy target class because CGLIB2 is not available

Thu, 01 Nov 2012 04:00:00 GMT

Spring AOP uses either JDK dynamic proxies or CGLIB to create the proxy for a given target object. If the target object to be proxied, does not implement any interfaces then a CGLIB proxy will be created. In this situation if CGLIB is not present in the classpath following exception will be thrown

Send logs by Email Notification using Apache log4j SMTPAppender

Thu, 11 Oct 2012 04:00:00 GMT

It is always better to get notified as soon as any major issues / exceptions occurred in the Application, instead of manually going thorugh huge logs to find probable exception messages. Apache log4j provides out of the box log Appender (called SMTPAppender) to send email alerts for the log level co

Deploy to AppFog PaaS using Cloud Foundry Integration plugin of Eclipse / STS

Mon, 01 Oct 2012 19:28:00 GMT

AppFog Cloud Platform is built by using the Cloud Foundry OSS bits alongside its own set of custom extensions and enhancements. AppFog provides good command line tool to deploy application but we can configure Cloud Foundry Integration plugin of Eclipse / Spring Tool Suite (STS) to deploy web applic

Configure Simple Logging Facade for Java (SLF4J) with log4j as underlying logging framework

Wed, 26 Sep 2012 04:00:00 GMT

Simple Logging Facade for Java (SLF4J) is an abstraction of different logging frameworks (eg. log4j, java.util.logging, commons logging etc.). This tutorial describes how to configure SLF4J with log4j as underlying logging framework. To use SLF4J, it is required to include 3 jars SLF4J API (slf4j-a

Example to Generate Random Alpha Numeric Text

Tue, 18 Sep 2012 04:00:00 GMT

This example shows how to generate random alpha numeric text which is not easy to guess.

Dynamically create image from text using Java Servlet

Sat, 15 Sep 2012 04:00:00 GMT

This example shows how we can dynamically create an image from a text ('Hello World!') by writing a simple Java Servlet. In the next post, we'll see how this dynamic creation of image can be used to implement custom CAPTCHA validation.

How to retain DOCTYPE declaration while saving DOM Document to an XML file

Thu, 13 Sep 2012 04:00:00 GMT

If we save a DOM Document to an XML file using javax.xml.transform.Transformer, DOCTYPE declaration gets emitted by default. This example shows how we can retain PUBLIC and SYSTEM id of the DOCTYPE declaration for external DTD.

Configure GZIP Filter on Jetty 8 for dynamic compression of contents

Mon, 10 Sep 2012 04:00:00 GMT

Jetty provides Gzip Filter to enable dynamic compression of contents like html, javascript, css etc. Just a servlet filter 'org.eclipse.jetty.servlets.GzipFilter' needs to be configured in web.xml to save bandwidth and speed up your website.

Programmatically Start or Stop an Application, deployed in IBM WebSphere Application Server (WAS) using Java Code and ANT script

Fri, 17 Aug 2012 04:00:00 GMT

This tutorial describes how an application, deployed in IBM WebSphere Application Server (WAS) can be started or stopped programmatically using Java code.

Invoke and Execute Hello World Ant Script Programmatically using Java Code

Mon, 06 Aug 2012 04:00:00 GMT

Apache Ant is an XML-based build tool to automate different tasks like compile, assemble, test source code, building deployment packages and run Java applications. This Hello World example shows how to invoke and run a simple Ant script programmatically using java code.

Full Text Hibernate Lucene Search Hello World Example Using Maven and SQLite

Thu, 26 Jul 2012 04:00:00 GMT

Hibernate Search is a full text search engine built using Apache Lucene framework. Hibernate Search indexes your domain model, keep the index upto date and also performs full text search functionality to fetch matching domain objects. This Hello World example shows how you can setup hibernate search

Hibernate Hello World example using Maven build tool and SQLite database

Wed, 18 Jul 2012 04:00:00 GMT

This tutorial will help you to write an annotation based hibernate java program which will save some records into a database and fetch them all using Hibernate API. We will use Maven tool to build the project, Eclipse IDE to code and SQLite database to save / retrieve records. SQLite is a self-conta

How to traverse a folder or directory recursively using Java File API

Mon, 16 Jul 2012 04:00:00 GMT

This example shows how we can traverse a folder or directory structure using recursive algorithm by writing a small java program using Java File API.

Hello World Example of Simple Logging Facade for Java or SLF4J

Sun, 15 Jul 2012 14:02:00 GMT

Simple Logging Facade for Java (SLF4J) is an abstraction of different logging frameworks (eg. log4j, java.util.logging, commons logging etc.). This gives the developer an opportunity to plug-in desired logging framework at deployment time without changing the code. To use SLF4J, it is required to i

Tomcat Hello World Servlet using Eclipse IDE

Sat, 14 Jul 2012 14:50:00 GMT

This simple tutorial explains you, how you can run your first Servlet class that will print "Hello World!" string in the browser. We will use Eclipse IDE to develop the code and Tomcat webserver to run the servlet code.

How to perform binary search on a java.util.ArrayList

Sat, 14 Jul 2012 04:00:00 GMT

This example shows how an element of a java.util.ArrayList can be searched using 'binarySearch' method of java.util.Collections class. This method internally applies binary search algorithm to search a particular element.

JSP Hello World Example using Eclipse IDE and Tomcat web server

Tue, 10 Jul 2012 13:00:00 GMT

This simple tutorial describes how you can print "Hello World!" string in your browser by writing a simple JSP (Java server pages) program developed using eclipse IDE.

Java Hello World Example using Eclipse IDE

Sun, 08 Jul 2012 04:00:00 GMT

This article describes how to create a "Hello World" java program using Eclipse IDE. This program will print "Hello World" in the console.