1. Definition
int[][] arr2 = new int[3][3];
或
int[][] arr2 = new int[][]{{10,20,30},{40,50,60},{70,80,90}};(Recommended tutorial: java entry program)
The first 3 representatives This two-dimensional array is composed of three one-dimensional arrays;
The second 3 represents the number of elements in each one-dimensional array;
2. Two-dimensional array Classification
1. Regular two-dimensional array:
The number of elements of each one-dimensional array is the same
2. Irregular two-dimensional array:
The number of elements in each one-dimensional array is different
(Video tutorial recommendation: java video tutorial)
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