int[][] numbers = new int[7][]; // row 0 gets 5 columns numbers[0] = new int[5]; // row 1 gets 11 columns numbers[1] = new int[11]; // etc...
public static void main(String[] args) { int[][] foo = new int[][] { new int[] { 1, 2, 3 }, new int[] { 1, 2, 3, 4}, }; System.out.println(foo.length); //2 System.out.println(foo[0].length); //3 System.out.println(foo[1].length); //4 }