Java: Data Science Made Easy

Sorting text

Sometimes it is necessary to sort data during the cleaning process. The standard Java library provides several resources for accomplishing different types of sorts, with improvements added with the release of Java 8. In our first example, we will use the Comparator interface in conjunction with a lambda expression.

We start by declaring our Comparator variable compareInts. The first set of parenthesis after the equals sign contains the parameters to be passed to our method. Within the lambda expression, we call the compare method, which determines which integer is larger:

 Comparator<Integer> compareInts = (Integer first, Integer second) ->   Integer.compare(first, second); 

 

We can now call the sort method as we did previously: ...