Assigning part of an array in Java

Question

I want to fill in part of an array with the values of another array. Is there anyway I can do this without looping?

e.g.

int [] [] ArrayToFillIn = new int [3] [3]
int [] FillingArray = {1, 2};

for (int i = 1; i < 3; i++)
{
    ArrayToFillIn [i-1] [2] = FillingArray [i - 1];
}

in R it would be like:

ArrayToFillIn [c(1:2),3] = FillingArray []

(considering that R does not start from 0)

Thanks!

Normally you would use Arrays.copyOfRange, but because you're inserting across a 2D array you may not be able to leverage that without loops anyway. — Zircon
– Zircon, Commented Feb 17, 2017 at 15:26
Java doesn't have that sort of array splicing functionality. — Kayaman
– Kayaman, Commented Feb 17, 2017 at 15:40
Could you provide an example of the output you want to produce with your example input data? — Valentin
– Valentin, Commented Feb 17, 2017 at 16:02

ControlAltDel · Accepted Answer · 2017-02-17 15:24:48Z

1

Sure. Without a loop it would be

ArrayToFillIn [0] [2] = FillingArray [0];
ArrayToFillIn [1] [2] = FillingArray [1];

answered Feb 17, 2017 at 15:24

ControlAltDel

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1 Comment

niceman Over a year ago

I think The OP is talking about the general case :3

Youcef LAIDANI · Accepted Answer · 2017-02-17 15:44:16Z

0

What with this initialization:

int [] FillingArray = {1, 2};
int [][] ArrayToFillIn = new int[][]{{0, 0, FillingArray[0]}, {0, 0, FillingArray[1]}, {}};
//---------------------------------------------^-----------------------^----------------^

edited Feb 17, 2017 at 15:44

answered Feb 17, 2017 at 15:37

Youcef LAIDANI

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