Question

假设我想根据计数在循环内声明一定数量的变量。

private static void declaration(int amount)
{
    for (int i = 0; i <= amount; i++)
    {
        /*Code that declares variables.
         *
         *When i == 0, it will declare int num0 with a value of 0.
         *When i == 1, it will declare int num1 with a value of 0, etc.
         */
    }
}

这可以在Java内部进行吗？

Answer 1

不是这样，你需要某种数据结构，例如：列表，地图等。

e.g。如果需要通过名称识别

Map<String, Integer> variables = new HashMap<String, Integer>();
for (int i = 0; i <= amount; i++) {
    variables.put("num" + i, 0);
}
// latter get value
System.out.println(variables.get("num3"));

e.g。如果只有索引重要

int[] state = new int[amount];
for (int i = 0; i <= amount; i++) {
    state[i] = 0; // <== all elements are already zero, but just to show you idea
}

是否可以根据计数在循环内声明多个变量？

1 个答案: