import java.util.Scanner; public class Example {     public static void main(String[] args) {         Scanner scan = new Scanner(System.in);         System.out.println("请输入一个英文字符串或解密字符串");         String password = scan.nextLine();// 获取用户输入         char[] array = password.toCharArray();// 获取字符数组         for (int i = 0; i < array.length; i++) {// 遍历字符数组             array[i] = (char) (array[i] ^ 20000);// 对每个数组元素进行异或运算         }         System.out.println("加密或解密结果如下：");         System.err.println(new String(array));// 输出密钥     } }