how it works?

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Could someone explain how it works? how this part sort numbers in arraylist? Arrays.sort(list); for(int j = 0; j<list.length; j++) { System.out.println(list[j]); }

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Anthony Chalk

Level 30 , London, United Kingdom

3 February 2020, 22:51

All java classes come with default methods that you can call. sort is a method of the Arrays class https://docs.oracle.com/javase/7/docs/api/java/util/Arrays.html#sort(int[]) If your question is "what's the code Java used to write this method?", here's what it says in the library

/**
     * Sorts the specified array into ascending numerical order.
     *
     *Implementation note: The sorting algorithm is a Dual-Pivot Quicksort
     * by Vladimir Yaroslavskiy, Jon Bentley, and Joshua Bloch. This algorithm
     * offers O(n log(n)) performance on many data sets that cause other
     * quicksorts to degrade to quadratic performance, and is typically
     * faster than traditional (one-pivot) Quicksort implementations.
     *
     * @param a the array to be sorted
     */
    public static void sort(int[] a) {
        DualPivotQuicksort.sort(a, 0, a.length - 1, null, 0, 0);
    }

what does that all mean? I have no idea :)