Code Improvements

[darxriggs]

This pull request contains multiple commits, each covering a different aspect and dedicated commit message. It's therefore also a good idea to have a look at each commit individually.

[ikedam]

Some changes look good as they resolve problems.

• Using latest URIs (Old URIs will outdate)
• Removing unused imports (they should cause warnings).

But other changes look unnecessary as original codes don’t cause problems and don’t considered wrong. I prefer preserving original codes as far as it doesn’t cause problems.
I don’t know much about latest JDKs and let me know if those original codes cause errors or warnings.

[darxriggs]

Most of the changes (102059e, e0ecb9d, bdc6d9b, 17c3074, 1009d30, e4206b5) are based on findings from IntelliJ IDEA. The rest (311de6b, 5645cee) are additional suggestions from myself.

For me all of them improve the code in some way. Reducing warnings, using more up-to-date Java syntax/features, more consistency, ...

Can you name the commits you are willing to merge? Then I'll remove the other ones.

[ikedam]

I don’t use IntelliJ and I’m not sure where those warnings come from (javac, findbugs, or other lint tools).
Authorized-project originally developed with java6 and there are many possible improvements with the latest java. I don’t introduce those fixes 1) to preserve original codes ( and minimize changes) , 2) I won’t do that every time the java.level changed as far as they are harmless (and this “harmless” is where we have to consider here).

Following commits are acceptable to me without any considerations:

• 311de6b
• e0ecb9d

[darxriggs]

The pull request now only contains the two commits we agreed on.