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JDK (Java Development Kit), which includes JRE plus the development tools (such. If you do not install Java before running an Adobe application, there can be missing or improperly behaving features. Java SE 11 LTS (18.9) (JDK 11) (September 2018): Extended var to lambda. At runtime, when you launch an Adobe application, you are prompted to install Java if it is not already installed. Or it can be installed later before you install Adobe applications. Adobe and Apple have worked together to ensure that you can install Java at OS install time. Since current Adobe installers and applications were built before these changes by Apple, Adobe software anticipates that Java is installed. It is now an optional install that you must select. Apple recently changed the way it includes Java in Mac OS, and with Lion, Java is no longer preinstalled. Download and Install OpenJDK 11 OpenJDK 11 is the open source distribution of JDK 11, licensed under GNU General Public License version 2 (GPLv2).

Many Adobe applications depend on the Oracle Java Runtime Environment (JRE) for some features to work.
