why array is not sorted in below javacode?

when i run the code ,array p is not sorted. I cant figure out

why is this happening? 

import java.util.Arrays;

public class Main {

    public static void main (String[] args){

        //creating array p
        int[] p= new int[] {2,7,8,3,9,1,4,5,6,0 };

        //sort p[5] to p[9]
        Arrays.sort(p, 5, 9);
        for(int l=0;l<p.length;l++)
        {
            System.out.print(p[l]);
        }

    }
}

output is:2783914560

Jon Skeet
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You're specifically asking to sort the portion from p[5] to p[9] exclusive of the upper bound... so 4 elements, which are already in order (1, 4, 5, 6).

If you want to sort to p[9] inclusive, you should call

Arrays.sort(p, 5, 10);

From the documentation:

toIndex - the index of the last element, exclusive, to be sorted

Of course, that still won't sort the whole array - just the last part of it, so you'd end up with { 2, 7, 8, 3, 9, 0, 1, 4, 5, 6 }. To sort the whole array, just call Arrays.sort(p).

Note that the pattern of specifying a range using an inclusive lower bound and an exclusive upper bound is very common in computing, and you should get used to it. Another common example is String.substring:

String text = "0123456789";
String substring = text.substring(0, 5); // 01234

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