## How to create an irregular shaped two dimensional array in Java

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I need to create a two dimensional array for a card game as seen in the image below. The array has 5 total rows, the top two containing 5 columns each and the bottom three rows containing three columns each. Would the best method be to just create a typical 5x5 square array and place NULL values in the 6 empty cells? Or is there a more sophisticated way to do this for oddly shaped 2D arrays?

```Square[][] Board = new Square[5][5];
board[5][5] = NULL;
```

Would the best method be to just create a typical 5x5 square array and place NULL values in the 6 empty cells?

Yes, I think it would be the most intuitive solution. Keep in mind you need to distinguish an empty call and empty card cell, so you can't use null for both. It shouldn't be a problem: a constant instance `Square.EMPTY` would help.

A two-dimensional array is the best data structure for this kind of games. If you can come up with a method that tells what the boundaries are and how to iterate over the board nicely, you will be fine.

Or is there a more sophisticated way to do this for oddly shaped 2D arrays?

I can't think of any. You could have

```Square[][] board = new Square[MAX][];

board[2] = new Square[MAX];
board[3] = new Square[NOT_MAX];
```

but for arrays of length `NOT_MAX`, you additionally need to store an offset. It complicates things and assumes the pattern stays always as simple as you've shown. For a pattern with gaps in between, it won't work.

Multidimensional Arrays in Java, I need to create a two dimensional array for a card game as seen in the image below. The array has 5 total rows, the top two containing 5 columns each and the � Similarly to represent 3x2 matrices you need 2 two dimensional arrays of a one-dimensional array of length 3. In other words, each row in a two-dimensional array is a one-dimensional array. Java truly doesn't support multi-dimensional array but allows you to create and use an array of any number of dimensional.

There's no better way except not to use an array at all. In any case, you'll want to use an accessor function that deals with array bounds and empty slots in some uniform way, rather than depend on every user of the data structure to know about the bounds and the possibility of NULL entries.

Jagged Array in Java, Data in multidimensional arrays are stored in tabular form (in row major order). Syntax: data_type[1st For example: int, char, etc. dimension: The dimension of the array created. As an example, let's find the total number of even and odd numbers in an input array. Here, we An array is formed as row. In Java, one declares a two dimensional array the same as in C or C++, but the memory allocation by the compiler is different. E.g., in C one declares a two-dimensional array of int as . int [ ][ ] table = new int [3][5]; The memory management system will allocate 60 (3*5*4) bytes of contiguous memory. It will store the two dimensional array as

You can create your array like this:

```Square[][] board = new Square[5][];
board[0] = new Square[5];
board[1] = new Square[5];
board[2] = new Square[3];
board[3] = new Square[3];
board[4] = new Square[3];
```

Javanotes 8.1, Section 7.5 -- Two-dimensional Arrays, Program to demonstrate 2-D jagged array in Java. class Main. {. public static void main(String[] args). {. // Declaring 2-D array with 2 rows. In two dimensional array represent as rows and columns. 2) To print the two-dimensional array, for loop iterates from o to i<3 for loop iterates from j=0 to j<2 print the element which is at the index a[i][j].

By default Java arrays contain `null` for user-defined types if a value hasn't been set. You should just be able to set the other entries with what you want.

2d array java Code Example, This creates a 2D array of int that has 12 elements arranged in 3 rows and 4 columns. of rows of A. If A has the usual shape for a 2D array, then the number of columns in A would be the A regular black piece can only move "down" the grid. Java, however, lets you create two-dimensional arrays in which the length of each element of the main array is different. Sometimes, this is called a jagged array because the array doesn’t form a nice rectangle. Instead, its edges are jagged. Arrays with more than two dimensions. Java doesn’t limit you to two-dimensional arrays.

Get code examples like "2d array java" instantly right from your google search results with the java by Small Indian Mongoose on Nov 20 2019 Donate android dynamically create layer-list with item and shape site:stackoverflow.com � android esponente in java � even or odd in java � example of simple maven pom java� Before we learn about the multidimensional array, make sure you know about Java array. A multidimensional array is an array of arrays. Each element of a multidimensional array is an array itself. For example, int[][] a = new int[3][4]; Here, we have created a multidimensional array named a. It is a 2-dimensional array, that can hold a maximum

Prerequisite : Arrays in Java. Jagged array is array of arrays such that member arrays can be of different sizes, i.e., we can create a 2-D arrays but with variable number of columns in each row. These type of arrays are also known as Jagged arrays. Following are Java programs to demonstrate the above concept.

Array-Basics in Java Multidimensional Arrays can be defined in simple words as array of arrays. Data in multidimensional arrays are stored in tabular form (in row major order). Syntax: data_type[1st dimension][2nd dimension][]..[Nth dimension] array_name = new data_type[size1][size2]….[sizeN]; where: data_type: Type of data to be stored in