编辑器
public class Main { public static void main(String[] args) { int[][] myNumbers = { {1, 4, 2}, {3, 6, 8, 5, 2} }; System.out.println("Rows: " + myNumbers.length); // 2 System.out.println("Cols in row 0: " + myNumbers[0].length); // 3 System.out.println("Cols in row 1: " + myNumbers[1].length); // 5 } }
Rows: 2
Cols in row 0: 3
Cols in row 1: 5
编辑器