Java and some other object oriented programs makes use of the command line arguments. This enables one to pass additional information to a program when it is run. whatever information that is passed to the program at the command line argument will accompany the program when is it run and java stores this information as an array of strings.
That probably means that you opened and edited something in one editor than opened it in another so its probably something like that .What program is this?
A disk defragmenter is a utility that reorganizes the files and unused space on a computer's hard disk so that the operating system accesses data more quickly and programs run faster.