The link is for SVN, not for a browser.
SVN is a source code control system.
You need to download SVN and install it on your computer. Then you supply the link, username and password to access the source code.
Detailed instructions can be found here:
After you check out/download the source code, you will need to open them in and IDE, e.g., NetBeans or Eclipse. See for further information:
If you are new to Java programming, you may start with SuanShu.