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About Ilias Tsagklis

Ilias Tsagklis
Ilias is a software developer turned online entrepreneur. He is co-founder and Executive Editor at Java Code Geeks.

Sort arrays example

This is an example of how to sort arrays. We are using an int array in the example, but the same API applies to any type of arrays e.g. byte[], char[], double[], float[], long[], short[]. Sorting an int array implies that you should:

  • Create an int array with elements.
  • Invoke sort(int[] a) API method of Arrays . It sorts an array in ascending order based on quicksort algorithm.
  • We can fully sort an array by using sort(array) method of Arrays or we can partially sort an array by using sort(array, startIndex, endIndex) API method of Arrays where startIndex is inclusive and endIndex is exclusive. We can print the array’s elements before and after sorting in order to check the elements’ sorting.

Let’s take a look at the code snippet that follows:

package com.javacodegeeks.snippets.core;

import java.util.Arrays;
 
public class SortArrayExample {
 
  public static void main(String[] args) {
 
    /*

Please note that the same API applies to any type of arrays e.g. 

byte[], char[], double[], float[], long[], short[]
    */

    // Create int array
    int intArray[] = {1,4,3,5,2};
 
    System.out.print("Array prior sorting :");
    for(int i=0; i < intArray.length ; i++)

System.out.print("  "  + intArray[i]);
 
    /*
     Arrays.sort() method sorts an array in ascending order based on quicksort
     algorithm. We can fully sort an array by using Arrays.sort(array) operation 
     or we can partially sort an array by using Arrays.sort(array, startIndex, endIndex) 
     operation where startIndex is inclusive and endIndex is exclusive
    */
    Arrays.sort(intArray);
 
    System.out.print("nArray after full sort :");
    for(int i=0; i < intArray.length ; i++)

System.out.print("  "  + intArray[i]);

  }
}

Output:

Array prior sorting :  1  4  3  5  2
Array after full sort :  1  2  3  4  5

 
This was an example of how to sort an array in Java.

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