[Bash] Kill all processes matching the given pattern

Recently I am in need of shutting down multiple java processes all at once in the development environment, so I finally came up with a bash script to obtain all java process ids and kill them.

ps -aux | grep "java" | grep -v "grep" | awk '{print $2}' | while read -r pid ; do
    echo "Shutting down PID: $pid"
    kill $pid
done

Details：

1. ps -aux: List all processes。
2. grep "java": Filter all processes containing java in the commands.
3. grep -v "grep": Surpress the current shell scipt process.
4. awk '{print $2}': Preserve process id in column 2 and delete all other columns.
5. Loop through all pids and kill them.