13 Things To Do After Installing IntelliJ Idea

IntelliJ Idea: the famous IDE for JVM languages including Java, Scala, and Kotlin. If you don't have it installed, follow Install IntelliJ IDEA on Linux to install the latest IntelliJ Idea. This article shows you some hidden tweaks to boost your productivity with IntelliJ Idea.

Wait! Isn't IntelliJ Idea ready to be used out of the box? There is no doubt about the capability of IntelliJ Idea; of course, it can handle your project without any tweaks and customization. However, this article shows you how I customize my IntelliJ Idea for better productivity. All we going to do is enabling some hidden features and installing some plugins that may take your favorite IDE to the next level.

Though I specifically mention the IntelliJ Idea, the following tweaks apply to all Jetbrains' IDEs:

• Android Studio
• AppCode
• CLion
• GoLand
• PhpStorm
• PyCharm
• Rider
• RubyMine
• WebStorm

1. Enable the toolbar

Go to View → Appearance and select Toolbar

The toolbar provides quick access to frequently used buttons such as Save All, Back, and Forward with a cost of small vertical space. I prefer to have the toolbar enabled because it moves the Build button to the left that makes it easy to access using my muscle memory. In addition, you can add more shortcuts to this toolbar if you like.

Read More

Setup Presto SQL Development Environment

Presto SQL a massively parallel processing big-data engine grasps the attention of many big-data developers. This article is for those who like to set up a development environment for the Presto SQL community edition. The below-mentioned steps are applicable for any Presto variations including Presto DB with class names and file names replaced by equivalent names.

Requirements:

• Java Development Kit 8 (after March 2020, Presto SQL is using Java 11)
• IntelliJ IDEA Community/Ultimate Edition
• Latest Apache Maven (Older versions may not build Presto)
• Git

Read More

Install the latest Eclipse on Linux

This article shows you the way to install the latest version of Eclipse on Linux. There are other ways to install Eclipse using scripts to automate the installation. However, I prefer the manual installation method explained in this article so that you know where your files go. Later if you want to remove the Eclipse, it is just two commands as explained at the end of the article.

If you do not have Java in your system, follow this link and install the Java first.

Step 1:

Download the desired version of Eclipse from the official site:

• DOWNLOAD

Step 2:

Open the Terminal (Ctrl + Alt + T) and enter the following command to change the directory.

cd /opt

Step 3:

Enter the command given below to extract the Eclipse from ~/Downloads directory. If your downloaded file is in any other directory, replace the last parameter by the actual file path.

sudo tar -xvzf ~/Downloads/eclipse-jee-2019-12-R-linux-gtk-x86_64.tar.gz

Step 4:

Open another Terminal (Ctrl + Alt + T) and enter the following command to create a shortcut file for eclipse.

gedit eclipse.desktop

Step 5:

In the opened gedit, copy and paste the following text.

[Desktop Entry]
Name=Eclipse
Type=Application
Exec=/opt/eclipse/eclipse
Terminal=false
Icon=/opt/eclipse/icon.xpm
Comment=Integrated Development Environment
NoDisplay=false
Categories=Development;IDE;
Name[en]=Eclipse
Name[en_US]=Eclipse

Step 6:

Save and close the gedit.

Step 7:

Enter the following command in the terminal to install the shortcut.

sudo desktop-file-install eclipse.desktop

Now search for Eclipse in the dashboard and open it.

---

Upgrade Eclipse

If you have already installed Eclipse using the above method and would like to upgrade the Eclipse to the latest version, just remove the Eclipse from /opt director and follow Steps 1 to 3 from the installation process.

sudo rm -rf /opt/eclipse

---

Remove Eclipse

Removing the Eclipse installed as described in this article is just two lines of commands.

Step 1:
First, remove the menu entry you created in Step 7.

sudo rm /usr/share/applications/eclipse.desktop

Step 2:
Delete the /opt/eclipse folder.

sudo rm -rf /opt/eclipse

Read More

Apache Maven for Beginners

Apache Maven is a build tool widely being used by Java developers to manage project dependencies, control build process and automate tests. Apache Maven makes our life easier especially in building a complex Java project. However, beginners stay away from Apache Maven as I did years ago just because they find it complex to learn and use. This article simplifies the concept of Apache Maven and introduces Maven in a smooth way to beginners. In this article, you will see how you can use Apache Maven to manage your project dependencies using a simple Java project as an example. The article is structured into two main topics: Apache Maven in Eclipse and Apache Maven in IntelliJ IDEA. Of course, you can use Apache Maven without any IDEs. However, I stick with IDEs to make it simple for beginners. Other applications of Apache Maven like build management and test automation will be covered in another article.

Let's begin with manual dependency management using a simple calculator application. Suppose you want to develop a Calculator that receives a simple arithmetic expression like "2 + 3 * 5" as input and prints the output in the console. It is a complex task to evaluate such a String input and calculate the result by ourselves. Fortunately, there is a library: exp4j which can evaluate a String expression and return the output.

Read More

Setup Scala on IntelliJ IDEA

Scala is a JVM based functional programming language widely being used in data analytics. You can install Scala on Ubuntu using sudo apt install scala. However, IDE support is inevitable these days. Therefore, this article explains how to use Scala in IntelliJ IDEA. If you want to install Scala from binary files, follow the Install Scala the Old School Way article.

Step 1:

Install Oracle JDK 1.8. Please note that Scala strictly requires Java 1.8. You can follow my article Install Oracle JDK 8 on Linux to install JDK 1.8 on Linux.

Step 2:

Install the latest IntelliJ IDEA. You can install either the community version or the Ultimate version depending on the license. Again, I have an article explaining how to Install IntelliJ IDEA on Linux.

Read More

Singleton Template For Eclipse

Singleton design pattern is one of the mostly used design pattern. This tutorial helps you to add a template in Eclipse to easily create Singleton Java classes.

Step 1:

Go to the Windows → Preferences

Step 2:

Expand the Java → Editor → Templates as shown below.

Read More

Add MySQL JDBC Driver to Eclipse

This tutorial shows you the way to add the latest MySQL JDBC driver to Eclipse. Same steps can be followed to add any other JDBC drivers to Eclipse.

Step 1:

Download and extract the MySQL JDBC connector, from this link: Download Connector/J

Step 2:

Copy the mysql-connector-java-xxx-bin.jar file to any desired folder.

Step 3:

Go to the Window → Preferences in Eclipse.

Read More

Install Android Studio in Ubuntu 14.04

Android Studio is the official development tool for Android developers. This tutorial shows you the way to install the latest Android Studio in Ubuntu 14.04. Solutions for some common problems are provided at the end of this tutorial. Android Studio requires Oracle JDK 7.0 or latest in your system. If you do not have JDK, follow this link and install the Java first.

Read More

Global Menu Support for Java Applications in Ubuntu

Java swing applications' menus do not integrate with Ubuntu's global menu. A library called Jayatana is available to enable global menu support for Java swing applications in Ubuntu (From Ubuntu 15.04 Jayatana became a default library but it is disabled since 30-09-2015). There are hundreds of articles available about Jayatana, but this article has an additional hack to remove the irritating message, printed by Jayatana.
If you already have Jayatana in your system, jump to: Remove: Picked up JAVA_TOOL_OPTIONS Message

If you have not noticed any differences between Java swing applications and others, have a look at the following screenshots of Android Studio and Eclipse.

Android Studio without global menu support

Eclipse with global menu

Read More