Learn to arrange an array of strings alphabetically using Stream.sorted()
and Arrays.sort()
methods. Also, learn to reverse sort using Comparator.reverseOrder()
.
1. Stream.sorted() – Java 8
Java 8 stream APIs have introduced a lot of exciting features to write code in very precise ways which are more readable.
This example sorts the string array in a single line code using Stream
. It uses the Stream.sorted()
method which helps in sorting a stream of objects in their natural order or according to the provided Comparator.
For reverse sorting the array, use Comparator.reverseOrder()
.
// Unsorted string array String[] strArray = { "Alex", "Charles", "Dean", "Amanda", "Brian" }; // Sorting the strings strArray = Stream.of(strArray) .sorted() .toArray(String[]::new); // Sorted array System.out.println("Sorted : " + Arrays.toString(strArray)); // Reverse sorting example strArray = Stream.of(strArray) .sorted(Comparator.reverseOrder()) .toArray(String[]::new); // Reverse Sorted array System.out.println("Sorted : " + Arrays.toString(strArray));
Program output.
Sorted : [Alex, Amanda, Brian, Charles, Dean] Reverse Sorted : [Dean, Charles, Brian, Amanda, Alex]
2. Arrays.sort() – Java 7
Arrays.sort()
provides similar functionality as Stream.sorted()
if you are still in Java 7.
// Unsorted string array String[] strArray = { "Alex", "Charles", "Dean", "Amanda", "Brian" }; // Sorting the strings Arrays.sort(strArray); // Sorted array System.out.println("Sorted : " + Arrays.toString(strArray)); Arrays.sort(strArray, Comparator.reverseOrder()); // Reverse Sorted array System.out.println("Sorted : " + Arrays.toString(strArray));
Program output.
Sorted : [Alex, Amanda, Brian, Charles, Dean] Reverse Sorted : [Dean, Charles, Brian, Amanda, Alex]
Drop me your questions related to comparing and sorting a string array in alphabetical order.
Happy Learning !!
Comments