# Quick Answer: Can you make a 4d array in Java?

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## Can you have 4D arrays in Java?

Yep. I just solved a problem with dynamic programming and used a 4D array. Three of the dimensions had fixed ranges, and the other dimension was dependent on n.

## Is 4D array possible?

An 4D array can be used to store a collection of data, for example we input 3 coordinates & 1 time, i.e., x, y, z, t and we want to check whether there is collision between two vehicles or not.

## How do you create a 4D array?

1. a = np.array([[[1,2,3],[4,5,6]],[[7,8,9],[10,11,12]],[[13,14,15],[16,17,18]]])
2. a = np.expand_dims(a, axis=0)
3. a = np.repeat(a, 4, axis=0)

## What is 4D array in Java?

In Java Programming, we can declare n-dimensional array or Muti dimensional array by placing n number of brackets [ ], where n is dimension number. For example, int[2][3][4] StudentArray = 3D Array. int[2][2][3][4] StudentArray = 4D Array.

## Can you make a 3D array in Java?

Multidimensional Arrays in Java – GeeksforGeeks.

## What is jagged array in Java?

Prerequisite: Arrays in Java. A jagged array is an array of arrays such that member arrays can be of different sizes, i.e., we can create a 2-D array but with a variable number of columns in each row. These types of arrays are also known as Jagged arrays.

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## How a multidimensional array is represented in Java?

The Java multidimensional arrays are arranged as an array of arrays i.e. each element of a multi-dimensional array is another array. The representation of the elements is in rows and columns. Thus, you can get a total number of elements in a multidimensional array by multiplying row size with column size.

## What are multidimensional arrays in Java?

In Java, a multi-dimensional array is nothing but an array of arrays. 2D array − A two-dimensional array in Java is represented as an array of one-dimensional arrays of the same type. Mostly, it is used to represent a table of values with rows and columns − Int[][] myArray = {{10, 20, 30}, {11, 21, 31}, {12, 22, 32} }

## What is a 5d array?

A five-dimensional array is a mapping from five indexes to one value. If you have this exact requirement, a five-dimensional array is probably the most efficient as well as the most readable way to implement this mapping.

## When would you use a 4D array?

A practical use of a 4D array is to keep track of a 3d object, could keep track of [x-cord][y-cord][z-cord][time]. This 4D array would be a useful use of a 4D array. This could keep track of a range of cords and time, and the value in the array could say the speed of of the object.

## How many dimensions can multidimensional array have?

A multidimensional array in MATLAB® is an array with more than two dimensions. In a matrix, the two dimensions are represented by rows and columns. Each element is defined by two subscripts, the row index and the column index.

## What is a 4d Numpy array?

A 4d numpy array is an array nested 4 layers deep, so at the top level it would look like this: [ # 1st level Array (Outer) [ # 2nd level Array [[1, 2], [3, 4]], # 3rd level arrays, containing 2 4th level arrays [[5, 6], [7, 8]] ], [ # 2nd Level array [[9, 10], [11, 12]], [[13, 14], [15, 16]] ] ]

## Can we create zero length array?

Yes, you can create arrays of any type with length zero.

## How do you use 2D arrays?

To create an array use the new keyword, followed by a space, then the type, and then the number of rows in square brackets followed by the number of columns in square brackets, like this new int[numRows][numCols] . The number of elements in a 2D array is the number of rows times the number of columns.