This basically allows operations like find references or show hierarchy to focus the results on either all the java sources or from sources excluding test cases. The idea here would be to take this ...

Nearly 95 percent of endpoints actively running Java are vulnerable to at least a single Java exploit, according to new data from Websense. The security firm decided to measure the actual state of ...

i.e. intuitively it looks like the variable will only be available within the block but it is accessible outside the block .. in javascript's case, because var doesn't make a block level declaration.