An example of how to use arrays in Java, how to sort the items and how to mix them

Code:

import java.util.*;

public class ArrayTest 
{
	public static void main (String [] args)
	{
		// Declare an array of String
		String[] customers = {   
			"Arianne",
			"Bill", 
			"David", 
			"Manuel", 
			"Veronic", 
			"Asia", 
			"Daniel", 
			"Renate", 
			"Vincent", 
			"Alexia" 
			};
		
		Print(customers, "List of customers:");
		
		// Order the array
		Arrays.sort(customers);
		Print(customers, "List of customers, after order:");
		
		// Shuffle the array
		Shuffle(customers);
		Print(customers, "List of customers, after shuffle:");
			
		System.exit(0);
	}
	
	// Print content of the array
	private static void Print(String[] a, String t)
	{
		System.out.println( t );
		for(int n=0; n<a.length; n++)
			System.out.println("["+n+"] " + a[n] );
		System.out.println( );	
	}

	// Shuffle all elements of the array
	private static void Shuffle(String[] a) 
	{
		int n = a.length;
		for (int i = 0; i < n; i++) 
		{
		int s = i + (int) (Math.random() * (n-i));
		Swap(a, i, s);
		}
	}
	
	// Swap the content of two elements of the array
	private static void Swap(String[] a, int i, int j)
        {
	String swap = a[i];
	a[i] = a[j];
	a[j] = swap;
	}
}

Result:

>java -cp . ArrayTest
List of customers:
[0] Arianne
[1] Bill
[2] David
[3] Manuel
[4] Veronic
[5] Asia
[6] Daniel
[7] Renate
[8] Vincent
[9] Alexia

List of customers, after order:
[0] Alexia
[1] Arianne
[2] Asia
[3] Bill
[4] Daniel
[5] David
[6] Manuel
[7] Renate
[8] Veronic
[9] Vincent

List of customers, after shuffle:
[0] Manuel
[1] Bill
[2] Daniel
[3] Alexia
[4] Renate
[5] Veronic
[6] Asia
[7] Arianne
[8] Vincent
[9] David

>Exit code: 0