error: cannot infer type arguments for PriorityQueue<> PriorityQueue<Integer> pq = new PriorityQueue<>( ^

这个错误是由于无法推断出优先队列 `PriorityQueue` 的类型参数导致的。为了解决这个问题，您可以明确指定类型参数的类型。在您的代码中，您使用了 `Integer` 类型，所以您可以修改代码如下：

PriorityQueue<Integer> pq = new PriorityQueue<Integer>(
    intervals.length, (Integer a, Integer b) -> a - b);

通过在 `PriorityQueue` 的构造函数中指定类型参数为 `Integer`，编译器就可以正确推断出类型参数，并解决错误。

希望能解决您的问题！如果您还有其他问题，请随时提问。

相关问题

private static final Map<String, ISMSSendAPI> handlerMap = new HashMap<>() 报错 Cannot infer type arguments for HashMap<>

这个错误是因为Java编译器无法推断HashMap的类型参数。可以尝试在HashMap后面指定类型参数，如下所示：

private static final Map<String, ISMSSendAPI> handlerMap = new HashMap<String, ISMSSendAPI>();

或者，你可以使用钻石操作符来让编译器推断类型参数：

private static final Map<String, ISMSSendAPI> handlerMap = new HashMap<>();

这样编译器就会根据变量声明的类型来自动推断HashMap的类型参数。

Cannot infer type arguments for HashMap<>

`HashMap<>` is a generic class in Java, which means that it requires type arguments to be specified. You need to specify the type of keys and values. For example, if you want a `HashMap` that maps strings to integers, you would declare it as follows:

HashMap<String, Integer> map = new HashMap<String, Integer>();

In this case, `String` is the type of keys, and `Integer` is the type of values. If you want to use type inference, you can omit the type arguments on the right-hand side of the assignment, and Java will infer them from the context:

HashMap<String, Integer> map = new HashMap<>();

Here, Java infers the type arguments based on the left-hand side of the assignment.