Software Development

Intellij Idea – How to Build Project Automatically

IntelliJ IDEA is one of the most popular integrated development environments (IDEs) for Java and other languages. It provides numerous features to enhance developer productivity, including the ability to build projects automatically. This feature can save time and effort by compiling your code whenever changes are detected. Additionally, IntelliJ IDEA supports a variety of programming languages, smart code assistance, built-in debugging tools, and seamless integration with popular version control systems like Git. Let us explore how to create a project in IntelliJ IDEA and enable automatic builds, making your development workflow more efficient.

1. Building Project

Before enabling automatic builds, let’s understand how to build a project manually in IntelliJ IDEA:

1.1 Steps to Build a Project

  • Open your project in IntelliJ IDEA.
  • Go to the Build menu in the top navigation bar.
  • Select Build Project or press Ctrl+F9 (on Windows/Linux) or Cmd+F9 (on macOS).

Once the build is complete, you can see the output in the build tool window. This process ensures that all dependencies are resolved, and your code is compiled into an executable format.

Below is a simple example of a Java project structure:

// Main.java
public class Main {
    public static void main(String[] args) {
        System.out.println("Hello, IntelliJ IDEA!");
    }
}

1.2 Enabling Automatic Project Builds

To enable automatic builds in IntelliJ IDEA, you must configure the IDE settings appropriately. Follow these steps:

1.2.1 Enable Compiler Auto-Make

  • Go to File --> Settings (or IntelliJ IDEA --> Preferences on macOS).
  • Navigate to Build, Execution, Deployment --> Compiler.
  • Check the box for Build project automatically.
  • Click Apply and then OK.

1.2.2 Enable “Allow Auto-Make to Start Even if Developed Application Is Running”

In the same Compiler settings, check the option Allow auto-make to start even if the developed application is running. This allows your application to remain up-to-date without requiring manual rebuilds during runtime.

1.2.3 Enable Automatic Builds in the Registry

To make automatic builds work in real-time, enable the option in the registry:

  • Press Ctrl+Shift+A (on Windows/Linux) or Cmd+Shift+A (on macOS) to open the “Actions” dialog.
  • Search for Registry… and select it.
  • In the registry window, search for compiler.automake.allow.when.app.running.
  • Check the box next to it.

1.2.4 Start Automatic Build

After enabling these settings, IntelliJ IDEA will automatically build your project whenever you make changes to the source code. Make sure to have the “Build” tool window open to monitor the build status. This real-time feedback ensures your project remains error-free and ready for deployment.

1.3 Additional Tips

  • Ensure that your system has sufficient resources for IntelliJ IDEA to run smoothly, especially when enabling automatic builds.
  • Keep your IDE updated to benefit from the latest features and performance improvements.
  • Familiarize yourself with IntelliJ IDEA’s shortcuts to speed up navigation and development tasks.

2. Benefits of Automatic Builds

Automatic builds streamline the development process by:

  • Reducing manual effort and saving time.
  • Ensuring that changes are compiled immediately, minimizing runtime errors.
  • Providing real-time feedback during application development.

This feature is particularly useful for teams working on large-scale projects where rapid iteration and testing are critical.

3. Conclusion

Enabling automatic builds in IntelliJ IDEA is a simple but effective way to enhance your development workflow. It ensures that your code is always compiled, reducing the chances of runtime errors caused by uncompiled changes. IntelliJ IDEA’s robust features and customization options make it a top choice for developers.

Yatin Batra

An experience full-stack engineer well versed with Core Java, Spring/Springboot, MVC, Security, AOP, Frontend (Angular & React), and cloud technologies (such as AWS, GCP, Jenkins, Docker, K8).
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