java - 如何在输出中随机生成字母？

Question

我想在二维数组中随机生成字母“D”和“C” 所以输出看起来像这样

0 0 0 0 0

0D 0C 0

C 0 D 0 D

DC 0 0 0

0 D 0 C D 然后再次生成，但一切都随机发生在不同的地方

C D 0 C D

C 0 0 DC

0 0 0 C 0

0D 0CD

D 0 C 0 C

...等等

公共(public)类数组{

public static void main(String[] args) {
    // Create 2-dimensional array.
    int[][] values = new int[5][5];

    String s = "abcdefghijklmnopqrstuvwxyz";

    for (int i = 0; i < values.length; i++) {
        // Loop and display sub-arrays.
        int[] sub = values[i];
        for (int x = 0; x < sub.length; x++) {
            System.out.print(sub[x] + " ");

        }

        for (int x = 0; x < values[0].length; x++) {

            for (int y = 0; y < values.length; y++) {
                int x = (int) (Math.random() * 26); // random int between 0-25
                String letter = "" + s.charAt(x); //concatenates
                values[x][y] = letter; // declares.
            }
        }

        System.out.println();

    }
}

}

Answer 1

在这种情况下，您需要......

String s = "0CD"; ////HEREs WHATS DIFFERENT
//loop through rows
for(int x = 0; x< values[0].length;x++)
{
//loops through columns
 for(int y = 0; y< values.length;y++)
 { 
   int x = (int)(Math.random()*3); // HEREs WHATS DIFFERENT
   String letter = ""+s.charAt(x); //concatenates
   values[x][y] = letter; // declares.
  }
}

我标记了您需要更改的值以及应该更改的内容