如何将字符串向量转换为字符数组

import java.util.Vector;

public class StringVectorToArray {
    public static void main(String[] args) {
        // 创建一个字符串向量
        Vector<String> stringVector = new Vector<>();
        stringVector.add("Hello");
        stringVector.add("World");

        // 将字符串向量转换为字符数组
        char[] charArray = new char[0];
        for (String str : stringVector) {
            char[] strArray = str.toCharArray();
            charArray = concatCharArray(charArray, strArray);
        }

        // 打印转换后的字符数组
        System.out.println(charArray);
    }

    // 数组拼接方法
    private static char[] concatCharArray(char[] arr1, char[] arr2) {
        int len1 = arr1.length;
        int len2 = arr2.length;
        char[] result = new char[len1 + len2];
        System.arraycopy(arr1, 0, result, 0, len1);
        System.arraycopy(arr2, 0, result, len1, len2);
        return result;
    }
}