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javaarraysinteger
Andrew Boyley
Andrew Boyley

Reputation: 37

How to make an array of integer arrays in Java?

I have been trying to make an array of integer arrays. I know that the outer array will have length N whilst every integer array within in only needs to hold two values.

Originally, I made an ArrayList with an Integer array:

int[] intArray = new int[2];
ArrayList<IntArray> outerArray = new ArrayList<>();

I then proceeded to just make an ArrayList of Integer within another ArrayList:

ArrayList<ArrayList<Integer>> outerArray = new ArrayList<>();

I'm looking for something that looks like this if N = 3 and a,b,c are integers:

{{a1, a2}, {b1, b2}, {c1, c2}}

Upvotes: 1

Views: 8304

Answers (2)

Ciprian
Ciprian

Reputation: 11

You can use this I think.

final int n = 5;
Integer[][] ints = new Integer[n][2];

Upvotes: 1

Łukasz Kochanowski
Łukasz Kochanowski

Reputation: 92

private int[][] array = new int[10][10];

And you wrote something like this : 

ArrayList<ArrayList<Integer>>

This is not an array, but list. You might read this : https://www.geeksforgeeks.org/array-vs-arraylist-in-java/

Upvotes: 1

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