整数值到颜色 (JAVA)

Question

我制作了一个二维数组，其中随机填充了 0 到用户选择的数字（最多 6 个）之间的数字。我想用颜色更改这些数字，但是当我尝试将每个值分配给一种颜色时，我收到无法从 int 转换为颜色的消息...有什么建议吗？因为我真的卡住了

    public static void rellenarTablero(int[][] tablero) {
    System.out.println("Introduzca el numero de colores (de 2 a 6): ");
    Scanner in = new Scanner(System.in);
    int colores = in.nextInt();
    while(colores<2||colores>6){
        System.out.println("Elija un numero valido:");
        colores = in.nextInt();
    }
    for (int x = 0; x < tablero.length; x++) {
        for (int y = 0; y < tablero[x].length; y++) {
            tablero[x][y] =1+(int)(Math.random()*(colores));
            if(x==1){
                x=Color.BLUE;
            }if(y==1){
                y=Color.BLUE;
            }
            if(x==2){
                x=Color.RED;
            } 
            if(y==2){
                y=Color.RED;
            }
            if(x==3){
                x=Color.GREEN;
            }
            if(y==3){
                y=Color.GREEN;
            }
        }
    }
}

Answer 1

如果我理解正确，这应该可以修复您的代码。我已经插入了关于我所做的最重要更改的评论。

// if the table is to be filled with colors, declare it an table of Color
public static void rellenarTablero(Color[][] tablero) {
    System.out.println("Introduzca el numero de colores (de 2 a 6): ");
    Scanner in = new Scanner(System.in);
    int colores = in.nextInt();
    while (colores < 2 || colores > 6) {
        System.out.println("Elija un numero valido:");
        colores = in.nextInt();
    }
    // I prefer to use a Random object for random integers, it’s a matter of taste
    Random rand = new Random();
    for (int x = 0; x < tablero.length; x++) {
        for (int y = 0; y < tablero[x].length; y++) {
            int numeroAleatorioDeColor = 1 + rand.nextInt(3);
            // prefer if-else to make sure exactly one case is chosen
            if (numeroAleatorioDeColor == 1) {
                // fill the color into the table (not the int)
                tablero[x][y] = Color.BLUE;
            }
            else if (numeroAleatorioDeColor == 2) {
                tablero[x][y] = Color.RED;
            }
            else if (numeroAleatorioDeColor == 3) {
                tablero[x][y] = Color.GREEN;
            }
            else {
                System.err.println("Error interno " + numeroAleatorioDeColor);
            }
        }
    }
}

从一开始就将必须选择的所有颜色放入一个单独的数组中可能更容易：

static final Color[] todosColores = { Color.BLUE, Color.RED, Color.GREEN, Color.YELLOW, Color.BLACK, Color.ORANGE };

如果您有多种颜色可供选择，则尤其如此。现在您只需：

            // number to use for array index; should start from 0, so don’t add 1
            int numeroAleatorioDeColor = rand.nextInt(todosColores.length);
            tablero[x][y] = todosColores[numeroAleatorioDeColor];

整数值到颜色 (JAVA)

Integer Value to Color (JAVA)

java

arrays

colors

assign