How to sort Arrays in Java

Yes we have many sorting algorithms to sort elements. We used to implement one of the sorting algorithm to sort elements in previous programming languages like C, C++ etc.. But sorting an array in Java is a simple process. All we have to do is to use the sort method of Arrays class in Java.

Internally sort() method of java.util.Arrays class uses 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.

Tutorial

package com.javaindetail.arraysort;

import java.util.Arrays;

public class UsingSortMethod {
  public static void main(String[] args) {
    // sort arrays in java
    // array of byte
    byte[] b = { 5, 100, 1, 20 };
    // sorts elements of the specified array in ascending order
    Arrays.sort(b);
    // Printing Array
    System.out.println(Arrays.toString(b));

    // An array of short
    short[] s = { 4, 500, 1, 12, 9 };
    // sorts elements of the specified array in ascending order
    Arrays.sort(s);
    // Printing Array
    System.out.println(Arrays.toString(s));

    // An array of int
    int[] i = { 42, 12, 68, 21 };
    // sorts elements of the specified array in ascending order
    Arrays.sort(i);
    // Printing Array
    System.out.println(Arrays.toString(i));

    // An array of long
    long[] l = { 87912, 4212, 21158, 985000, 8561 };
    // sorts elements of the specified array in ascending order
    Arrays.sort(l);
    // Printing Array
    System.out.println(Arrays.toString(l));

    // An array of double
    double[] d = { 12.5, 87.4, 41.24, 14.9, 55.8 };
    // sorts elements of the specified array in ascending order
    Arrays.sort(d);
    // Printing Array
    System.out.println(Arrays.toString(d));

    // An array of char
    char[] c = { 'j', 'a', 'v', 'a', 'i', 'n', 'd', 'e', 't', 'a', 'i', 'l' };
    // sorts elements of the specified array in ascending order
    Arrays.sort(c);
    // Printing Array
    System.out.println(Arrays.toString(c));

    // An array of String
    String[] str = { "java", "in", "detail", "com" };
    // sorts elements of the specified array in ascending order
    Arrays.sort(str);
    // Printing Array
    System.out.println(Arrays.toString(str));

  }
}

Output

[1, 5, 20, 100]
[1, 4, 9, 12, 500]
[12, 21, 42, 68]
[4212, 8561, 21158, 87912, 985000]
[12.5, 14.9, 41.24, 55.8, 87.4]
[a, a, a, d, e, i, i, j, l, n, t, v]
[com, detail, in, java]