: A robust online Java editor that supports standard input and multiple dependencies.

: An open-source IDE that provides a "quick and smart" way to code and is particularly strong for desktop application development.

: A free, cloud-based platform that supports Java and allows you to run code instantly.

: Highly reliable free distributions include Azul Zulu , Adoptium (Eclipse Temurin) , and Amazon Corretto . 2. Free Integrated Development Environments (IDEs)