想要追加数据，需要的流程是：数组-> List-> 数组

案例

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class AddValues {
    public static void main(String[] args) {
        String[] strings = new String[]{"a", "b", "c", "d"};

        //开始添加数据
        List<String> arrayList = new ArrayList<String>(Arrays.asList(strings));
        // List<String> arrayList = Arrays.asList(strings); //不要这样
        arrayList.add("e");
        arrayList.add("f");
        System.out.println(arrayList);

        // 重新赋值
        String[] string2 = arrayList.toArray(new String[0]);
        System.out.println(Arrays.toString(string2));
    }
}