如何在子类中重新定义数组大小？

// 父类
class ParentClass {
    protected int[] array;

    public ParentClass(int size) {
        array = new int[size];
    }

    public void setArraySize(int size) {
        array = new int[size];
    }
}

// 子类
class ChildClass extends ParentClass {
    public ChildClass(int size) {
        super(size);
    }

    @Override
    public void setArraySize(int size) {
        int[] newArray = new int[size];
        System.arraycopy(array, 0, newArray, 0, Math.min(size, array.length));
        array = newArray;
    }
}

// 使用示例
public class Main {
    public static void main(String[] args) {
        ParentClass parent = new ParentClass(5);
        parent.setArraySize(10);
        System.out.println(parent.array.length); // 输出：10

        ChildClass child = new ChildClass(5);
        child.setArraySize(3);
        System.out.println(child.array.length); // 输出：3
    }
}