1. Ensure JDK updated to the latest version
2. Download IJava
ijava下载地址：https://github.com/SpencerPark/IJava/releases
Unzip it into a temporary location. It should have at least the install.py and java folder extracted in there.
在install.py和java上层文件夹中打开terminal:
# Pass the -h option to see the help page
> python3 install.py -h
# Otherwise a common install command is
> python3 install.py --sys-prefix (其实直接运行这步）
3. Check if java-kernel loaded
>jupyter kernelspec list
如果kernel列表中有java，则ok了。
下面在jupyter notebook里面新建代码文件时，可以选用使用java kernel。
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