2D Arrays HW

public class ArrayResizer {

    /**
     * this checks if every value in row r of array2D is not zero
     */
    public static boolean isNonZeroRow(int[][] array2D, int r) {
        for (int value : array2D[r]) {
            if (value == 0) {
                return false;  //  it finds a zero, so the row aint non-zero
            }
        }
        return true;  // no zeros found, row is all non-zero
    }

    /**
     * counts how many rows in the array2D have all non-zero values
     */
    public static int numNonZeroRows(int[][] array2D) {
        int count = 0;
        for (int r = 0; r < array2D.length; r++) {
            if (isNonZeroRow(array2D, r)) {
                count++;  // increases count if the row has no zeros
            }
        }
        return count;
    }

    /**
     * creates a new 2D array with only non-zero rows from array2D
     */
    public static int[][] resize(int[][] array2D) {
        int newRowCount = numNonZeroRows(array2D);  // getss number of non-zero rows
        int[][] resizedArray = new int[newRowCount][array2D[0].length];

        int newRowIdx = 0;
        for (int r = 0; r < array2D.length; r++) {
            if (isNonZeroRow(array2D, r)) {
                // copies the non-zero row into the new array
                for (int c = 0; c < array2D[0].length; c++) {
                    resizedArray[newRowIdx][c] = array2D[r][c];
                }
                newRowIdx++;  // moves to the next row in the new array
            }
        }
        return resizedArray;
    }
}