twodarray.java

public class twodarray {
    public static void main(String[] args){

        // 2D array = An array where each element is an array
        //                    Useful for storing a matrix of data

        //-----------------------
        //   EXAMPLE 1
        //-----------------------
        
        String[][] groceries = {{"apple", "orange", "banana"},
                                              {"potato", "onion", "carrot"},
                                              {"chicken", "pork", "beef", "fish"}};

        groceries[2][1] = "eggs";

        for(String[] foods : groceries){
            for(String food : foods){
                System.out.print(food + " ");
            }
            System.out.println();
        }

        //-----------------------
        //   EXAMPLE 2
        //-----------------------

        char[][] telephone = {{'1', '2', '3'},
                              {'4', '5', '6'},
                              {'7', '8', '9'},
                              {'*', '0', '#'}};

        for(char[] row : telephone){
            for(char number : row){
                System.out.print(number + " ");
            }
            System.out.println();
        }
    }
}