// arrays/CollectionComparison.java

// (c)2017 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

import java.util.*;

import onjava.*;

import static onjava.ArrayShow.*;

class BerylliumSphere {

private static long counter;

private final long id = counter++;

@Override

public String toString() {

return "Sphere " + id;

}

}

public class CollectionComparison {

public static void main(String[] args) {

BerylliumSphere[] spheres =

new BerylliumSphere[10];

for(int i = 0; i < 5; i++)

spheres[i] = new BerylliumSphere();

show(spheres);

System.out.println(spheres[4]);

List<BerylliumSphere> sphereList = Suppliers.create(

ArrayList::new, BerylliumSphere::new, 5);

System.out.println(sphereList);

System.out.println(sphereList.get(4));

int[] integers = { 0, 1, 2, 3, 4, 5 };

show(integers);

System.out.println(integers[4]);

List<Integer> intList = new ArrayList<>(

Arrays.asList(0, 1, 2, 3, 4, 5));

intList.add(97);

System.out.println(intList);

System.out.println(intList.get(4));

}

}

/* Output:

[Sphere 0, Sphere 1, Sphere 2, Sphere 3, Sphere 4,

null, null, null, null, null]

Sphere 4

[Sphere 5, Sphere 6, Sphere 7, Sphere 8, Sphere 9]

Sphere 9

[0, 1, 2, 3, 4, 5]

4

[0, 1, 2, 3, 4, 5, 97]

4

*/