Script to inject

Example

bash update_jnf_linkage.sh /path/to/JavaNativeFoundation.framework.zip /path/to/MyApp.app

Download a prebuild JavaNativeFoundation.framework.zip at https://drive.google.com/file/d/1j9HCMNvlplIBdgG6zitfZqxYVM1seB-J/view?usp=drive_link
Or build it yourself from sources https://github.com/apple/openjdk/tree/xcodejdk14-release/apple/JavaNativeFoundation

update_jnf_linkage.sh

#!/bin/bash

# Check if correct arguments are given
if [ "$#" -ne 2 ]; then
    echo "Usage: $0 <path-to-JavaNativeFoundation.zip> <path-to-App.app>"
    exit 1
fi

JNF_ZIP_PATH="$1"
APP_PATH="$2"
JNF_FRAMEWORK_NAME="JavaNativeFoundation.framework"
APP_FRAMEWORKS_DIR="$APP_PATH/Contents/Frameworks"
TEMP_DIR="$APP_PATH/Contents/Frameworks/temp_jnf_extraction"

# Ensure the Frameworks directory exists
mkdir -p "$APP_FRAMEWORKS_DIR"
# Extract JavaNativeFoundation.framework to the temporary directory
ditto -x -k "$JNF_ZIP_PATH" "$APP_FRAMEWORKS_DIR/"

JRE_LIB_DIR="$APP_PATH/Contents/Java/jre/lib"
cd "$JRE_LIB_DIR"
rm -rf "$JNF_FRAMEWORK_NAME"
RELATIVE_PATH_TO_FRAMEWORKS="../../../Frameworks"

# Create a symlink in the JRE's "lib" directory pointing to the extracted JavaNativeFoundation.framework
ln -s "$RELATIVE_PATH_TO_FRAMEWORKS/$JNF_FRAMEWORK_NAME" "$JNF_FRAMEWORK_NAME"
cd - > /dev/null
# Function to update linkage
update_linkage() {
    local file="$1"
    # Check if the file links to the system JavaNativeFoundation
    if otool -L "$file" | grep -q '/System/Library/Frameworks/JavaVM.framework/Versions/A/Frameworks/JavaNativeFoundation.framework/Versions/A/JavaNativeFoundation'; then
        # Change linkage to use the version in @executable_path/../Frameworks/
        install_name_tool -change "/System/Library/Frameworks/JavaVM.framework/Versions/A/Frameworks/JavaNativeFoundation.framework/Versions/A/JavaNativeFoundation" "@executable_path/../Frameworks/JavaNativeFoundation.framework/Versions/A/JavaNativeFoundation" "$file"
        echo "Updated linkage for $file"
    fi
}

export -f update_linkage

# Update dependencies in the JRE directory
find "$JRE_LIB_DIR" \( -name "*.dylib" -o -name "*.so" -o -perm +111 \) -type f -exec bash -c 'update_linkage "$0"' {} \;

# Additionally check and update the Contents/MacOS and Contents/Frameworks directories
APP_MACOS_DIR="$APP_PATH/Contents/MacOS"

# Function to update app dependency
update_app_dependency() {
    local search_dir="$1"
    find "$search_dir" \( -name "*.dylib" -o -name "*.so" -o -perm +111 \) -type f -exec bash -c 'update_linkage "$0"' {} \;
}

update_app_dependency "$APP_MACOS_DIR"
update_app_dependency "$APP_FRAMEWORKS_DIR"

echo "Finished updating dependencies."