Which programming language is primarily used for Liferay development?

Liferay is primarily a Java-based framework, designed to leverage Java's capabilities in building enterprise-level applications and portals. This reliance on Java encompasses the development of Liferay's core functionalities, service layers, and custom portlets. Java's strong typing, multithreading capabilities, and vast ecosystem of libraries and frameworks make it an ideal choice for creating robust and scalable applications within the Liferay platform.

Furthermore, many Liferay features, including its API, are built with Java, which facilitates the development of custom applications and integrations. Developers also utilize Java in conjunction with Liferay's service builder for creating model classes and service layers that interact with the database.

While other programming languages like JavaScript are used within Liferay for client-side scripting and enhancing user interfaces, the foundational development and server-side functionalities are firmly rooted in Java. This makes Java not just relevant but essential for effective Liferay development, ensuring that developers have a comprehensive toolkit when working on the platform.