// arrays/RaggedArray.java

// (c)2016 MindView LLC: see Copyright.txt

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

// Visit http://mindviewinc.com/Books/OnJava/ for more book information.

import java.util.*;

public class RaggedArray {

static int val = 1;

public static void main(String[] args) {

SplittableRandom rand = new SplittableRandom(47);

// 3-D array with varied-length vectors:

int[][][] a = new int[rand.nextInt(7)][][];

for(int i = 0; i < a.length; i++) {

a[i] = new int[rand.nextInt(5)][];

for(int j = 0; j < a[i].length; j++) {

a[i][j] = new int[rand.nextInt(5)];

Arrays.setAll(a[i][j], n -> val++); // (1)

}

}

System.out.println(Arrays.deepToString(a));

}

}

/* Output:

[[], [[1], [2], [3, 4, 5, 6]], [[], [7, 8], [9, 10]],

[[11, 12, 13], [14], [15, 16, 17, 18]], [[19, 20, 21],

[22, 23, 24], [25], []], [[26], [], [27]]]

*/