(Intro to java help?)

ArrayList

Write a static method called flip2 that takes an ArrayList of Strings as a parameter and then flips each successive pair of values in the list. For example, suppose that a variable called list stores the following sequence of values:

["aa", "bb", "cc", "DDD", "happy", "snow"]

and we make the following call:

flip(list);

Afterwards the list should store the following sequence of values:

["bb", "aa", "DDD", "cc", "snow", "happy"]

If the list has extra values that are not part of a pair, those values are unchanged. For example, if the list had instead stored:

["aa", "bb", "cc", "DDD", "happy", "snow", "hometown"]

The result would have been:

["bb", "aa", "DDD", "cc", "snow", "happy", "hometown"]