Write a Java program that does spell checking. The program should do spell checking as follows,

• The program should accept two text file names on the command line or prompt user to enter file. Please do not hardcode file name in program.
• The program should read both files into string variables. The first is the file to check, and the second is the dictionary.
• Both strings should be split into lists of words (two ArrayList collections)
• Implement your main loop. For each word in the document file, if that word doesn't exist in the dictionary, print it out, saying that it is an unknown word