Implementing a matrix structure in Java

Question

What would be the easiest way to implement a matrix of 'set' size m * n in Java? The matrix structure wouldn't need to handle any complex matrix operations such as matrix multiplications or anything, just to hold data - the only thing I would use it for is to access the data at M(i, j), change the data at M(i, j) and set the data at M(i, j) for values 0 <= i < m, 0 <= j < n.

Would the most straight forward approach to this problem be to fill an m-size array with n-size arrays or what is the recommended approach to this? Or is there some better data structure for this altogether?

if you know the bounds of your data structure, just use a 2D array — m_callens, Jan 27 '17 at 14:28
https://stackoverflow.com/questions/12231453/syntax-for-creating-a-two-dimensional-array — AntonH, Jan 27 '17 at 14:31

score 2 · Answer 1 · answered Jan 27 '17 at 14:28

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Doing this in a performant way that covers all edge-cases will be difficult if you do not already know how to make a basic implementation.

I would suggest using an existing library for this.

For example, take a look at toxiclibs.

answered Jan 27 '17 at 14:28

sdgfsdh

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score 1 · Accepted Answer · answered Jan 27 '17 at 14:32

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If you just need a 2-dimensional array with a size of 5*10:

int[][] multi = new int[5][10];

answered Jan 27 '17 at 14:32

Thomas

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score 1 · Answer 3 · answered Jan 27 '17 at 14:33

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I would recommend to use a 2D Array or a library.

For more info you can check https://docs.oracle.com/javase/tutorial/java/nutsandbolts/arrays.html

answered Jan 27 '17 at 14:33

Pascal Dierich

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score 1 · Answer 4 · answered Jan 27 '17 at 14:35

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If you are looking for matrix calculations on complex numbers (math) you may find a library here.

answered Jan 27 '17 at 14:35

Gérard Binkhorst

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Implementing a matrix structure in Java

4 Answers4