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Thread: How to Sort an Array using the java.util.Arrays class

  1. #1
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    Post How to Sort an Array using the java.util.Arrays class

    Here is a tutorial on how to use the java.util.Arrays class to sort Array values.

    This example sorts an Array of Integers from the smallest to largest value:

    import java.util.Arrays;
     
    public class HowToSortAnArray {
     
     public static void main(String[] args) {
     
      //Array of Integers
      int[] myIntArray = new int[]{20,100,69,4};
     
      //SORTS ARRAY FROM SMALLEST TO LARGEST INT
      Arrays.sort(myIntArray);
     
      //for loop to print Array values to console
      for (int a = 0; a < myIntArray.length; a++) {
       System.out.println(myIntArray[a]);
      }
     
     }
    }
    //Output: 4 20 69 100

    Using the same example as above but with a String Array, this will sort the values by case and then into alphabetical order:

    import java.util.Arrays;
     
    public class HowToSortAnArray {
     
     public static void main(String[] args) {
     
      String[] myStrArray = new String[] {"c", "b", "a", "D"};
     
      //SORTS STRING ARRAY INTO CASE & THEN ALPHABETICAL ORDER
      Arrays.sort(myStrArray);
     
      //for loop to print int values to console
      for (int a = 0; a < myStrArray.length; a++) {
       System.out.println(myStrArray[a]);
      }
     
     }
    }
    //Output: D a b c

    To sort into alphabetical order and be case insensitive you can use:

    import java.util.Arrays;
     
    public class HowToSortAnArray {
     
     public static void main(String[] args) {
     
      String[] myStrArray = new String[] {"c", "b", "a", "D"};
     
      //SORTS ARRAY INTO ALPHABETICAL ORDER
      Arrays.sort(myStrArray, String.CASE_INSENSITIVE_ORDER);
     
      //for loop to print int values to console
      for (int a = 0; a < myStrArray.length; a++) {
       System.out.println(myStrArray[a]);
      }
     
     }
    }
    //Output: a b c D
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  2. #2
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    Default Re: How to Sort an Array using the java.util.Arrays class

    Thanks for the useful post.

    Spring 3
    Last edited by cafeteria84; January 22nd, 2012 at 03:07 PM.

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    Default Re: How to Sort an Array using the java.util.Arrays class

    thank you guss . . .

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