Java 2d Arrays — Free Java Tutorial
Learn Java 2d Arrays in Java with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
TL;DR: Learn Java 2d Arrays in Java with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
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Java 2d Arrays in Java
A 2D array in Java is an array of arrays. Declare with: int[][] matrix = new int[rows][cols]; or using an initialiser: int[][] m = {{1,2},{3,4}};
Access elements with two indices: matrix[row][col]. Rows and columns are zero-indexed.
Iterate with nested loops: outer loop over rows (i), inner loop over columns (j). matrix.length gives the number of rows; matrix[0].length gives the number of columns.
Java supports jagged arrays (rows of different lengths) since each row is a separate array object.
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