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JDK-8029904 may affect code that uses the com.sun.security.auth.callback.DialogCallbackHandler, which was deprecated in JDK 8, and removed in JDK 9.

Build

Removed support for 1.5 and earlier source and target options

JDK-8011044 may affect source code that uses javac -source or -target options below 6/1.6 to compile.

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Milling Project Coin

JEP 213 may affect source code that uses underscore ("_") as an identifier. Its use generated a warning as of Java SE 8, and has been turned into an error in JDK 9.

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