Java从二维数组生成向量。

public class Main {
    public static void main(String[] args) {
        int[][] matrix = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
        int rows = matrix.length;
        int cols = matrix[0].length;

        int[] vector = new int[cols];

        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < cols; j++) {
                vector[j] = matrix[i][j];
            }
        }

        System.out.println("生成的向量为：");
        for (int num : vector) {
            System.out.print(num + " ");
        }
    }
}