如何扩展任意类型的List类

public class MyList<T> {
    private Object[] elements;
    private int size;
    private int capacity;

    public MyList() {
        capacity = 10;
        elements = new Object[capacity];
        size = 0;
    }

    public void add(T element) {
        if (size == capacity) {
            expandCapacity();
        }
        elements[size] = element;
        size++;
    }

    public T get(int index) {
        if (index < 0 || index >= size) {
            throw new IndexOutOfBoundsException();
        }
        return (T) elements[index];
    }

    public int size() {
        return size;
    }

    private void expandCapacity() {
        capacity *= 2;
        Object[] newElements = new Object[capacity];
        System.arraycopy(elements, 0, newElements, 0, size);
        elements = newElements;
    }
}

MyList<Integer> integerList = new MyList<>();
integerList.add(1);
integerList.add(2);
integerList.add(3);
System.out.println(integerList.get(0)); // 输出：1
System.out.println(integerList.size()); // 输出：3

MyList<String> stringList = new MyList<>();
stringList.add("Hello");
stringList.add("World");
System.out.println(stringList.get(1)); // 输出：World
System.out.println(stringList.size()); // 输出：2