Generating reflection json file

1. You need to package your java program in a JAR files.

2. Check the native-image-configure tool by command:

native-image-configure --help

3. Execute the command below (we assume that your JAR file named demo.jar):

java -agentlib:native-image-agent=trace-output=./trace-file.json -jar demo.jar

4. Generate the reflection config json file.

native-image-configure process-trace --output-dir=./graal/ ./trace-file.json

5. Then, you will find reflection_config.json in the output directory: ./graal/.

6. More detail: CONFIGURE.md, REFLECTION.md.