Sorting Arrays and Collections in Practice
Apply sorting to product lists, leaderboards, and event schedules using real-world examples.
Sorting in Practice
This lesson applies sorting techniques to realistic scenarios: product catalogs, leaderboards, event scheduling, and search result ranking.
Arrays.sort for Primitive Arrays
Arrays.sort() for primitive arrays uses a dual-pivot quicksort — extremely fast, O(n log n) average.
int[] scores = {45, 90, 78, 62, 88, 33};
Arrays.sort(scores);
System.out.println(Arrays.toString(scores)); // [33, 45, 62, 78, 88, 90]
// Sort a range only
int[] data = {9, 3, 7, 1, 5};
Arrays.sort(data, 1, 4); // sort indices 1-3 only
System.out.println(Arrays.toString(data)); // [9, 1, 3, 7, 5]All lessons in this course
- The Comparable Interface
- Comparator and Lambda Sorting
- Multi-Key Sorting with thenComparing
- Sorting Arrays and Collections in Practice