如何从2d数组中随机获取一对元素(java)

int[][] array = {
    {1, 2, 3},
    {4, 5, 6},
    {7, 8, 9}
};

int numRows = array.length;
int numCols = array[0].length;

int row1 = (int) (Math.random() * numRows);
int col1 = (int) (Math.random() * numCols);

int row2, col2;
do {
    row2 = (int) (Math.random() * numRows);
    col2 = (int) (Math.random() * numCols);
} while (row1 == row2 && col1 == col2);

int element1 = array[row1][col1];
int element2 = array[row2][col2];

public class Main {
    public static void main(String[] args) {
        int[][] array = {
            {1, 2, 3},
            {4, 5, 6},
            {7, 8, 9}
        };

        int numRows = array.length;
        int numCols = array[0].length;

        int row1 = (int) (Math.random() * numRows);
        int col1 = (int) (Math.random() * numCols);

        int row2, col2;
        do {
            row2 = (int) (Math.random() * numRows);
            col2 = (int) (Math.random() * numCols);
        } while (row1 == row2 && col1 == col2);

        int element1 = array[row1][col1];
        int element2 = array[row2][col2];

        System.out.println("随机选中的元素为：" + element1 + ", " + element2);
    }
}