将TreeMap转换为两个数组，强制转换问题

import java.util.*;

public class TreeMapToArrayExample {
    public static void main(String[] args) {
        // 创建一个TreeMap并添加键值对
        TreeMap<Integer, String> treeMap = new TreeMap<>();
        treeMap.put(1, "Apple");
        treeMap.put(2, "Banana");
        treeMap.put(3, "Orange");
        treeMap.put(4, "Mango");

        // 将键提取到一个数组中
        Integer[] keys = treeMap.keySet().toArray(new Integer[0]);

        // 将值提取到一个数组中
        String[] values = treeMap.values().toArray(new String[0]);

        // 打印输出键数组和值数组
        System.out.println("Keys: " + Arrays.toString(keys));
        System.out.println("Values: " + Arrays.toString(values));
    }
}

Keys: [1, 2, 3, 4]
Values: [Apple, Banana, Orange, Mango]