The free IntelliJ IDEA Community Edition, built on open source code, is for pure JVM development . The paid IntelliJ IDEA Ultimate is designed for full-stack and enterprise development, supporting a wide range of backend and frontend frameworks and technologies.
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Review of IntelliJ IDEA, a Java IDE The community edition is fine for basic Java development . It is suitable for desktop projects, and includes the visual GUI Builder, and also supports Maven and Ant build tools, JUnit and TestNG testing, Java and Android development, and rich editor support for Java and XML.
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