问题

我应该创建一个 `Cannon` 对象的列表（限制使用 `for` 循环），并加载所有未加载的 `Cannon`。

我的问题在于这里：

```java
public static void main (String[] args) throws java.lang.Exception{
    Random randomizer = new Random();
    Cannon cannon = new Cannon (randomizer.nextBoolean());
    List<Cannon> Cannons = new LinkedList<Cannon>();
    for (int i=0; i < randomizer.nextInt(99)+1; i++){
        cannon = randomizer.nextBoolean();
        Cannons.add(cannon);
    }
}

该程序报错为 不兼容的类型：无法将 boolean 转换为 Cannon，第33行。

如果您想查看完整的代码，这是链接：
https://kodilla.com/pl/project-java/175236

<details>
<summary>英文:</summary>

I am supposed to create list of `Cannon` objects (restricted to use `for-loop`) and load every `Cannon` that is not loaded.

My problem lies here:

``` java
public static void main (String[] args) throws java.lang.Exception{
    Random randomizer = new Random();
    Cannon cannon = new Cannon (randomizer.nextBoolean());
    List &lt;Cannon&gt; Cannons = new LinkedList &lt;Cannon&gt;();
    for (int i=0; i &lt;randomizer.nextInt(99)+1; i++){
    cannon = randomizer.nextBoolean();
    Cannons.add(cannon);
}

the program results with error incompatible types: boolean cannot be converted to Cannon, line 33

If you want to see the whole Code here is the link:
https://kodilla.com/pl/project-java/175236

答案1

得分: 1

你正在创建一个类型为Cannon的实例，然后试图重新将其分配给另一个类型（在这种情况下为布尔类型）。

Java是静态类型的。你不能这样随意地将一个类型重新分配给另一个类型。

如果你需要用变量填充一个列表，只需按照以下方式进行操作：

// 删除这里的方法
Cannon cannon = new Cannon(randomizer.nextBoolean());

// 并将其放入for循环中
for (int i = 0; i < randomizer.nextInt(99) + 1; i++) {
    Cannon cannon = new Cannon(randomizer.nextBoolean());
    Cannons.add(cannon);
}

// Remove this method here
Cannon cannon = new Cannon (randomizer.nextBoolean());

// and place it in the for-loop
for (int i = 0; i < randomizer.nextInt(99) + 1; i++) {
    Cannon cannon = new Cannon(randomizer.nextBoolean());
    Cannons.add(cannon);
}