diff --git a/_posts/groovy/2020-12-31-hello-world-in-groovy.md b/_posts/groovy/2020-12-31-hello-world-in-groovy.md
new file mode 100644
index 0000000..b9c320c
--- /dev/null
+++ b/_posts/groovy/2020-12-31-hello-world-in-groovy.md
@@ -0,0 +1,88 @@
+---
+layout: post
+title: "Hello World In Groovy"
+author: gaurav
+image: assets/images/2020-12-31/groovy-logo.png
+categories: [ Groovy]
+description: "In this article you will say 'Hello' to Groovy. We will see the installation and 'the' most important 'Hello World!' program."
+featured: false
+---
+In this article, you will say 'Hello' to Groovy. We will see the installation and 'the' most important "Hello World!" program. 🙂
+
+Apache Groovy is a **powerful**, **optionally typed**, and **dynamic** language. It integrates smoothly with any Java program.
+
+## How To Install Groovy?
+
+There are many ways you can [download and Install Groovy](https://groovy.apache.org/download.html).
+
+On this day, Groovy 3.0 is the latest stable version of Groovy designed for JDK8+.
+
+Currently, I am using Windows so we will be using a Windows installer, which is a community artifact.
+
+Here is a [link for Windows Installer for Groovy 3.0.7](https://bintray.com/groovy/Distributions/download_file?file_path=groovy-3.0.7.msi).
+
+Once you download the .msi file ( i.e. installer) simply double click on it and you will see the installation screen.
+
+![Groovy Installation Screen](/assets/images/2020-12-31/groovy-installation-screen.png)
+
+The installation is pretty simple and straight-forward. Click on next and go with the default setting.
+
+**Note:** If you are **using Mac OS** and you have Homebrew, you can install Groovy by the following command.
+
+```
+brew install groovy
+```
+
+Refer to the [official installation guide](https://groovy-lang.org/install.html) for more information.
+
+Once you are done with the installation, you can search for the Groovy Console from your start menu. And finally, you are ready to write your first "Hello World!" program.
+
+![Groovy Console in the Start Menu](/assets/images/2020-12-31/groovy-console-in-start-menu.png)
+
+
+## Hello World In Groovy
+
+Groovy is a JVM-based language. If you have used Java before you know [how we create a class, then method and write our print statement in it](https://youtu.be/P_r4QFLxBsQ).
+
+Things are pretty much different here.
+
+You can simply write the print statement with your "Hello World!" string and it will get printed on the console.
+
+So let's try.
+
+Open your Groovy Console. Add the following statement to it.
+
+```groovy
+println "Hello World!"
+```
+![Groovy Hello World Program In the Groovy Console](/assets/images/2020-12-31/groovy-hello-world-program-and-run-option.png)
+
+To run your program right click on the console and choose the 'Run' option.
+
+You can also use the shortcut `Ctrl+R` to run any groovy program.
+
+Boom!! 🎉
+
+You can see the string "Hello World!" is printed on the console. 
+
+![Groovy Hello World Program Output](/assets/images/2020-12-31/groovy-hello-world-output.png)
+
+So you have successfully written your first groovy program.
+
+That's it for now.
+
+You can visit my [YouTube channel 'coderolls'](https://www.youtube.com/channel/UCl31HHUdQbSHOQfc9L-wo3w?view_as=subscriber?sub_confirmation=1) to find more video tutorials.
+
+--------------
+
+You can support me by [giving a cup of Coffee ☕](https://www.paypal.me/GauravKukade)
+
+#### Related Articles
+
+- [8 Basic GIT Commands Every Newbie Developer Must Know](https://coderolls.com/basic-git-commands/)
+- [How To Reverse A String In Java (5 ways)](https://coderolls.com/reverse-a-string-in-java/)
+- [How To Create UUID in Java?](https://coderolls.com/create-uuid-in-java/)
+- [Learn About Java String Pool And intern() Method](https://coderolls.com/java-string-pool-and-intern-method/)
+- [How Do I Compare Strings In Java](https://coderolls.com/compare-strings-in-java/)
+- [Compare Two Strings Lexicographically In Java](https://coderolls.com/compare-two-strings-lexicographically-in-java/)
+- [Difference Between StringBuffer and StringBuilder class](https://coderolls.com/difference-between-stringbuffer-and-stringbuilder/)
\ No newline at end of file
diff --git a/_posts/2019-11-29-java-introduction.md b/_posts/java-basic/2019-11-29-java-introduction.md
similarity index 100%
rename from _posts/2019-11-29-java-introduction.md
rename to _posts/java-basic/2019-11-29-java-introduction.md
diff --git a/_posts/2020-12-24-convert-stringbuilder-to-string-in-java.md b/_posts/java-string/2020-12-24-convert-stringbuilder-to-string-in-java.md
similarity index 100%
rename from _posts/2020-12-24-convert-stringbuilder-to-string-in-java.md
rename to _posts/java-string/2020-12-24-convert-stringbuilder-to-string-in-java.md
diff --git a/_posts/2020-12-19-uuid-in -java.md b/_posts/java-uuid/2020-12-19-uuid-in -java.md
similarity index 100%
rename from _posts/2020-12-19-uuid-in -java.md
rename to _posts/java-uuid/2020-12-19-uuid-in -java.md
diff --git a/_posts/2020-12-23-create-uuid-in-java.md b/_posts/java-uuid/2020-12-23-create-uuid-in-java.md
similarity index 100%
rename from _posts/2020-12-23-create-uuid-in-java.md
rename to _posts/java-uuid/2020-12-23-create-uuid-in-java.md
diff --git a/assets/images/2020-12-31/groovy-console-in-start-menu.png b/assets/images/2020-12-31/groovy-console-in-start-menu.png
new file mode 100644
index 0000000..ce9229d
Binary files /dev/null and b/assets/images/2020-12-31/groovy-console-in-start-menu.png differ
diff --git a/assets/images/2020-12-31/groovy-hello-world-output.png b/assets/images/2020-12-31/groovy-hello-world-output.png
new file mode 100644
index 0000000..2a30234
Binary files /dev/null and b/assets/images/2020-12-31/groovy-hello-world-output.png differ
diff --git a/assets/images/2020-12-31/groovy-hello-world-program-and-run-option.png b/assets/images/2020-12-31/groovy-hello-world-program-and-run-option.png
new file mode 100644
index 0000000..cea8fac
Binary files /dev/null and b/assets/images/2020-12-31/groovy-hello-world-program-and-run-option.png differ
diff --git a/assets/images/2020-12-31/groovy-installation-screen.png b/assets/images/2020-12-31/groovy-installation-screen.png
new file mode 100644
index 0000000..ec7c2fe
Binary files /dev/null and b/assets/images/2020-12-31/groovy-installation-screen.png differ
diff --git a/assets/images/2020-12-31/groovy-logo.png b/assets/images/2020-12-31/groovy-logo.png
new file mode 100644
index 0000000..d6d7649
Binary files /dev/null and b/assets/images/2020-12-31/groovy-logo.png differ