If you need to update or change the JDK path after installation, you can modify the product.conf file located at: %USERPROFILE%\AppData\Roaming\JDeveloper\12.2.1.4.0\product.conf (Windows).Simply uncomment the SetJavaHome line and provide the path to your new JDK 8 directory. What's New in This Guide for Release 12c (12.2.1.4.0)
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To summarize the answer to the keyword : If you need to update or change the
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Locate the SetJavaHome line and point it to your valid JDK 8 directory (e.g., SetJavaHome C:\Program Files\Java\jdk1.8.0_211 ). Development Features in 12.2.1.4