Traversing through a 2D array

I am trying to figure out how to traverse through a 2D array. The way in which I have been doing it is by using a nested for loop. I am curious to know of any other ways in which this can be done. I just feel like I am repeatedly using nested for loops and would prefer not to.

for(int i=0; i<gameBoard.length; i++) {
    for(int j=0; j<gameBoard[i].length; j++) {
}

This is the only way in which I know how to access multiple elements within the array. Are there any other ways in which to traverse through multi-dimensional arrays?

If you're looking for alternative ways to process the elements within a matrix, you could use streams.

IntStream & Index approach

In the following example, I'm using two IntStream to print a matrix of int. Note that this approach is definitely not more efficient than a traditional nested loop. this is just an alternative way.

int[][] gameboard = new int[][]{{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
IntStream.range(0, gameboard.length)
        .boxed()                                                                // boxing each int row index to an Integer
        .forEach(i -> {                                                         // process each i-th row
            IntStream.range(0, gameboard[i].length)                             // creating a nested stream to process each element of the row
                    .boxed()                                                    // boxing each int column index to an Integer
                    .forEach(j -> System.out.printf("%d ", gameboard[i][j]));   // printing the i-th j-th element
            System.out.println();
        });

Stream approach

Here is an alternative version without indexes.

int[][] gameboard = new int[][]{{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
Arrays.stream(gameboard)
        .forEach(vet -> {
            Arrays.stream(vet)
                    .forEach(x -> System.out.printf("%d ", x));
            System.out.println();
        });

Stream & filter approach

Here is a version employing the filter aggregate operation, since you've added in the comments that you would like to use conditional statements.

int[][] gameboard = new int[][]{{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
Arrays.stream(gameboard)
        .forEach(vet -> {
            Arrays.stream(vet)
                    .filter(x -> x % 2 == 0)  // filtering only for even numbers
                    .forEach(x -> System.out.printf("%d ", x));
            System.out.println();
        });