To celebrate Java’s 25th anniversary this year, JetBrains has compiled data from multiple sources to look at what the current state of the language is.

JetBrains, which has provided its IntelliJ Idea Java IDE as a commercial product, now is offering a preview of a free, open source version of the IDE.

JetBrains is shipping version 9 of its IntelliJ Idea IDE for Java, this time offering both commercial and open source versions.