java boolean 2d array

A boolean 2D array is an array of arrays of boolean values in Java. It is used to store a two-dimensional table of boolean values, where each value represents a true or false condition.

To create a boolean 2D array in Java, you can use the following syntax:

boolean[][] array = new boolean[n][m];

Here, n is the number of rows and m is the number of columns in the array. This creates a 2D array with n rows and m columns, and all elements are initialized to false.

You can also create and initialize a boolean 2D array using an array literal:

boolean[][] array = {
    {true, false, true},
    {false, true, false},
    {true, false, true}
};

This creates a 3x3 array with the following values:

true  false true
false true  false
true  false true

To access and modify the elements of a boolean 2D array, you can use the array indexing notation array[i][j], where i is the row index and j is the column index. For example:

array[0][0] = true; // set element at row 0, column 0 to true
array[1][2] = true; // set element at row 1, column 2 to true
boolean value = array[2][1]; // get element at row 2, column 1

You can also use loops to iterate through the elements of a boolean 2D array. For example:

for (int i = 0; i < array.length; i++) {
    for (int j = 0; j < array[i].length; j++) {
        System.out.print(array[i][j] + " ");
    }
    System.out.println();
}

This will print the elements of the array in a grid format, with each row on a separate line.