How to create multidimensional array in java?

Question

I want to create a multidimensional array from existing array:

String arr1[] = new String[]{"1","2","3","4","5","6","7"};

String arr2[] = new String[]{"books","cars","mobile","tickets","flats","toys","chairs"};

String arr3[][] = new String[][]{ arr1, arr2};

The above code creates two rows and seven columns array. But I want to create an array with two columns and seven rows. Can anyone tell me how to create such array?

It's up to you how you treat index 0 and index 1 of your array. It can be column, row or vice versa. — user1455836, Feb 03 '14 at 08:39

score 0 · Accepted Answer · answered Feb 03 '14 at 08:54

0

If your third array capacity doesn't change then you use below code snippet

 String arr3[][] = new String[7][2];

      for(int i=0;i<arr1.length;i++){

          arr3[i][0]=arr1[i];
          arr3[i][1]=arr2[i];

          }

arr3:

[[1, books], [2, cars], [3, mobile], [4, tickets], [5, flats], [6, toys], [7, chairs]]

answered Feb 03 '14 at 08:54

gowtham

977
7
15

and what about if the size is not known then how we declare the multidimensional array, Like here we have seven rows but how about making it dynamic to n numbers of rows with fix two columns ? – Himanshu Agarwal Feb 03 '14 at 09:47
can do this *String arr3[][] = new String[arr1.length][2];* - Both arr1 and arr2 should be of same length – gowtham Feb 03 '14 at 09:52

score 0 · Answer 2 · answered Feb 03 '14 at 08:56

0

You can declare your array like this

new String[][] { { "1", "2" }, { "5", "6" }, { "9", "10" } };

or you can use just swap horizontal and vertical indexes to access your array

answered Feb 03 '14 at 08:56

Bitman

1,996
1
15
18

How to create multidimensional array in java?

2 Answers2