Sun announced at JavaOne that the development kit for its Java Platform Standard Edition platform will be available to developers on an open-source basis with GPLv2 licensing.

Oracle released a new version of the Java Development Kit, JDK 7 Update 40, with new performance and security enhancements.

The Java SE Development Kit consists of the Java compiler, tools for creating and managing JAR (Java Archive) files, and tools for managing and monitoring the JVM.

Eclipse is an open-source Integrated Development Environment (IDE) supported by IBM. Eclipse is a popular script creator for Java application development (Java SE and Java EE) and Android apps.