向Java数组中添加多个内容

对于这个程序,我应该添加两种不同的“镜像”(向前和向后的斜线代表我游戏中的镜像),分别是“/”和“\”。我已经成功地将第一组斜线添加到迷宫阵列中,但我似乎不知道如何同时添加两个不同的斜线。

public static void placeMirrors(){
    Scanner input = new Scanner(System.in);

    // Promopting user for how many mirrors they want
    System.out.print("\nHow many mirrors do you want in your maze?");
    System.out.print("The maximum number of mirrors you can have is 8. The minimum is 2.\n");
    int usersMirrors = input.nextInt();

    // Deploying mirrors randomly within the maze
    for (int i = 1; i <= usersMirrors;) {
        int x = (int)(Math.random() * numRows);
        int y = (int)(Math.random() * numCols);

        // *FIGURE OUT ADDING BOTH SETS AT ONCE THING*
        if((x >= 0 && x < numRows) && (y >= 0 && y < numCols) && (maze[x][y] == ".")) {
            maze[x][y] = "\\";
            i++;
        }
    }
    System.out.println("Mirrors placed.");
}