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Added a useful tip on 3D arrays (#23184)

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CyberCore1010
2018-11-23 04:25:44 +00:00
committed by Manish Giri
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guide/english/java/arrays/index.md
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@ -158,8 +158,11 @@ Similarly a 3D array can also be made. It can be visualized as a cuboid instead
int a=2, b=3, c=4; int a=2, b=3, c=4;
int[][][] a=new int[a][b][c]; int[][][] a=new int[a][b][c];
``` ```
In a similar manner, one can declare an array of as many dimensions as desired, although visualizing an array of more than 3 dimensions is difficult. In a similar manner, one can declare an array of as many dimensions as desired, although visualizing an array of more than 3 dimensions is difficult.
Tip: Arrays like this can be quite confusing, especially to beginners, so if you are planning to use this, be prepared to make a visual representation either in your head or on pen and paper.
### Jagged Arrays ### Jagged Arrays
Jagged arrays are multi-dimensional arrays that have a set number of rows but a varying number of columns. Jagged arrays are used to conserve memory use of the array. Here is an example: Jagged arrays are multi-dimensional arrays that have a set number of rows but a varying number of columns. Jagged arrays are used to conserve memory use of the array. Here is an example: