Mar 172020

ADM

How to check the JDK version of a class file

  • 17 March 2020
  • ADM

When running a Java application it is mandatory that the JRE version to match or to be higher that the JDK version used to compile the application.

You will get the "Unsupported major.minor version 52.0" error when trying to run an Java 1.8 application using a lower version of Java.

Mar 102020

ADM

Abstract keyword in Java

  • 10 March 2020
  • ADM

The abstract keyword is used in Java for abstraction. The abstraction is the process of selecting data and displaying only the relevant details to the object. If helps to reduce the programing complexity and the efort.

Mar 092020

ADM

All keywords in Java

  • 09 March 2020
  • ADM

Keywords are special words in the programing language which have reserved use in the language. Keywords may not be used as identifiers in Java; for example you cannot declare a field whose name is a keyword.

Feb 162020

George

XML and HTML sitemap file in SEO

The sitemap's a file place on your website that will enable Google and other search engines to crawl better and understand the structure of the site. Sitemaps also tell search engines which pages on your site are most important. It's a binder of your website's content.

Feb 132020

George

Robots.txt File in SEO

A robots.txt file tells search engine crawlers which pages or files the crawler can or can't request from your site. This is used mainly to avoid overloading your site with requests; it is not a mechanism for keeping a web page out of Google. To keep a web page out of Google, you should use noindex directives, or to password-protect your page.

Jul 262018

ADM

Java Custom Annotations Example

  • 26 July 2018
  • ADM

How to create Java Custom Annotation. A simple example of creating Annotations in Java and usage by calling the Reflection API.