The Java runtime is no longer installed automatically as part of the OS installation. There are two ways to install the Java runtime.
When you first use Adobe products that require the Java runtime, you are prompted to install the Java runtime. If you receive a notification that Java is required, follow the onscreen instructions for installation before using the Adobe product.
You can use the following method to initiate the Java runtime installation or confirm it is currently installed.
Many Adobe applications are dependent on the Oracle Java Runtime Environment (JRE) for some features to work. Apple recently changed the way it includes Java in Mac OS, and with Lion, Java is no longer preinstalled. It is now an optional install that you must select.
Since current Adobe installers and applications were built before these changes by Apple, Adobe software anticipates that Java is installed. Adobe and Apple have worked together to ensure that you can install Java at OS install time. Or that it can be installed at a later time before you install Adobe applications. At runtime when you launch an Adobe application, you are prompted to install Java if it is not already installed. If you do not install Java before running an Adobe application, there can be missing or improperly behaving features. If you encounter any issues, install Java to correct the problems. Adobe recommends that corporate IT organizations preinstall Java (or make sure that Java can be installed through their firewalls/security) to avoid conflicts with Adobe applications.
If the Java runtime is not installed, some issues that are known to occur include:
- Failures to launch
- Prompts to install Java runtime when attempting to use the applications
- Applications hang on quit