To run each example use: java --enable-preview --source 24 <FileName.java>

• 472 - Prepare to Restrict the Use of JNI
• 475 - Late Barrier Expansion for G1

• Prepare to Restrict the Use of JNI
  • align the command-line options to be used equally between JNI and FFM API
  • align how FFM API restrict the native method usage with warning instead of throwing an exception
    • JNI shows warnings unless --illegal-native-access=deny is provided
  • to use the previous behave we need to provide the following command-line options:
    • --enable-native-access=MyModule --illegal-native-access=deny
    • --illegal-native-access=warn is the default mode, in the future will be deny
    • this ways it will thrown an exception
  • added new JDK tool jnativescan to help identify the use of restricted methods and declarations of native methods
• Late Barrier Expansion for G1
  • reduce the overhead of C2 JIT compiler
  • reduce the execution time of C2 when using G1

• JDK 24 - JEP Dashboard
• JDK 24 JEPs