我知道Java不支持通用数组，但是我不知道如何解决这个问题，因此它可以正常工作

Question

我正在尝试创建一个HashTable，代码的这一部分需要一个数组，但是当它不被泛型泛型时，我会得到未经检查的警告，但是我知道不支持泛型数组，但是我不确定如何解决这个问题。 。

array = new HashEntry<AnyType>[ nextPrime( arraySize ) ];

Answer 1

I suggest checking out JDK's own code for HashMap , specifically the resize method and these lines:

    @SuppressWarnings({"rawtypes","unchecked"})
        Node<K,V>[] newTab = (Node<K,V>[])new Node[newCap];

newTab is then assigned to the main instance variable, table . So, if JDK can't avoid @SuppressWarnings , neither will you.

Answer 2

Write it as such

@SuppressWarnings("unchecked")
HashEntry<K, V>[] array = new HashEntry[nextPrime()];

then add @SuppressWarnings("unchecked") to it.

Answer 3

Don't use arrays. Use collections.

Using arrays requires more code, more care and gives no measurable benefit.

Using collections leverages the code and care built into the JDK.
If you've got an array of HashEntry, you're most of the way to a Map - just use a constant order map:

Map<SomeKey, SomeValue> map = new LinkedHashMap<SomeKey, SomeValue>();