7、Java泛型：类型擦除与代码演进

Java泛型：类型擦除与代码演进

1. 静态嵌套类与类型擦除

在Java编程中，静态嵌套类通常比非静态嵌套类更简单高效。非静态嵌套类会包含对外部实例的引用，因为它们一般可以访问该实例的组件。以下是一个静态嵌套类 LinkedIterator 的示例代码：

private static class LinkedIterator<T> implements Iterator<T> {
    private Node<T> current;
    public LinkedIterator(Node<T> first) { current = first; }
    public boolean hasNext() {
        return current.next != null;
    }
    public T next() {
        if (current.next != null) {
            current = current.next;
            return current.element;
        } else throw new NoSuchElementException();
    }
    public void remove() {
        throw new UnsupportedOperationException();
    }
}
public Iterator<E> iterator() {
    return new LinkedIterator&