在Java中获取泛型类型T？

我有这门课：

public class ActorFixture<T>
{
    public T actor;
    public String fixture;

    public ActorFixture() {}

    public ActorFixture(T actor, String fixture)
    {
        this.actor = actor;
        this.fixture = fixture;
    }

    public void setFixture(Fixture fa, Fixture fb)
    {
        Class<T> type;
        if (type.isInstance(fa))
        {
            actor = type.cast(fa.getBody().getUserData());
            fixture = (String)fa.getUserData();
        }
        else if (type.isInstance(fb))
        {
            actor = type.cast(fb.getBody().getUserData());
            fixture = (String)fb.getUserData();
        }
    }
}

但是我在“type”上得到一个警告，因为它没有初始化

检查类型的正确方法是什么？

试试以下方法：

Class<T> type = (Class<T>) this.actor.getClass();

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检查什么类型？