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In C# there are 2 ways to create mutlidimensional arrays.
int[,] array1 = new int[32,32];
int[][] array2 = new int[32][];
for(int i=0;i<32;i++) array2[i] = new int[32];
I know that the first method creates a 1-dimensional array internally, and that the second method creates an array of arrays (slower access).
However in Java, there is no such thing as [,], and I see multidimensional arrays declared like this:
int[][] array3 = new int[32][32];
Since such syntax is illegal in C#, and Java has no int[,], I'm wondering if this is equivilant to array1? Or is it still an array of arrays?
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A multi-dimensional array can be termed as an array of arrays that stores homogeneous data in tabular form. Data in multidimensional arrays are stored in row-major order. The general form of declaring N-dimensional arrays is: data_type array_name[size1][size2].... [sizeN];
In C programming, you can create an array of arrays. These arrays are known as multidimensional arrays. For example, float x[3][4];
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} }
Note that, in Java, arr exists but is null-valued. In C, arr doesn't exist until a complete declaration appears. Array objects in Java must be instantiated with a new operation, and it's there that the array size is specified: int[] arr = new int [10]; int[][] 2Darr = new int[10][20];
You are incorrect; jagged (nested) arrays are faster. (the CLR is optimized for them)
Java does not support true multi-dimensional arrays; that's a jagged array.
The Java syntax automatically creates all of the inner arrays; in C#, that would need a separate loop.
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