Downloading Source code

[Bahram Yarahmadi]

Hello folks
I am currently involved in research project and I want to convert Java
Bytecode to LLVM IR as a first step of my research project ,I want to use
Shark as a tool So I need to download the source code of Openjdk project
,But the internet connection in my country is not good ,
I have two questions ,

1 -Is there any other way (for exmaple download all files with a Dowload
manager directly or something like that ) ?
2 -Do you suggest me to download jdk8u or jdk8 according to my job that I
want to do ?

Thanks a lot