#Java jdk 9 for mac won't open code#

See JEP 182: Policy for Retiring javac -source and -target Options.Д¬ritical internal JDK APIs such as are still accessible in JDK 9, but most of the JDKвЂ™s internal APIs are not accessible at compile time. Javac can recognize and process class files of all previous JDKs, going all the way back to JDK 1.0.2 class files. The valid arguments for the -release flag follow the same policy as for -source and -target, one plus three back. source N -target N -bootclasspath $PATH_TO_rt.jar_FOR_RELEASE_N The -release N flag is conceptually a macro for: If possible, use the new -release flag instead of the -source and -target options. Use 1.6 or later.Д®rror: Target option 1.5 is no longer supported. Warning: bootstrap class path not set in conjunction with -source 1.5Д®rror: Source option 1.5 is no longer supported. In JDK 8, -source and -target values of 1.5/5 and earlier were deprecated and caused a warning to be generated. The supported -source/-target values are 9 (the default), 8, 7, and 6 (6 is deprecated, and a warning is displayed when this value is used). In JDK 9, javac uses a 'one plus three back' policy of supporting -source and -target options. If you use the -source and -target options with javac, then check the values that you use. Mењњlass.java:2: error: as of release 9, '_' is a keyword, and may not be used as a legal identifier.

#Java jdk 9 for mac won't open code#

This code generates the following error message from the compiler: Its use generates a warning in JDK 8, and an error in JDK 9. If you use the underscore character ('_') as a one-character identifier in source code, then your code wonвЂ™t compile in JDK 9.

If you need to compile your code with the JDK 9 compiler then take note of the following: Compiling your code with the JDK 9 compiler will ease migration to future releases since the code may depend on APIs and features which have been identified as problematic.