[rfc][icedtea-web] JNLPClassLoader for-loop and Enumeration cleanup

[Andrew Azores]

Hi,

This patch does three things.
1) Converts for-loops into for-each-loops when appropriate. Loops that 
remove elements from the iterated collection were not changed, nor were 
loops that make actual use of the index variable, nor were loops that do 
not iterate over every element.
2) Wraps some Enumeration usage in Collections.list(), so that the 
result is Iterable. This removes extra boilerplate and reduces the 
number of loop variables creeping out of absolute minimal scope, and 
again allows the usage of for-each-loops. Other Enumeration usage in the 
class is unfortunately part of its public interface, so in those cases 
nothing has been done.
3) Adds parameterized types in a few areas, eg raw Class type to 
Class<?> in for loadClassExt(String) for example, and List to 
List<JARDesc> in waitForJars(List<JARDesc>)

Changelog:
* netx/net/sourceforge/jnlp/runtime/JNLPClassLoader.java: add 
parameterized type information to several return types and local 
variables. Refactor for-loops and Enumeration iterations into 
for-each-loops.

Thanks,

-- 
Andrew A

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