题解 | #字符串加解密#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextLine()) { // 注意 while 处理多个 case
            //加密
            String str1 = in.nextLine();
            StringBuilder sb1 = new StringBuilder();
            //解密
            String str2 = in.nextLine();
            StringBuilder sb2 = new StringBuilder();
            String a = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
            String b = "BCDEFGHIJKLMNOPQRSTUVWXYZAbcdefghijklmnopqrstuvwxyza1234567890";
            //对字符串进行加密解密  
            for(int i = 0;i < str1.length();i++){
                sb1.append(b.charAt(a.indexOf(str1.charAt(i))));
            }
            for(int i = 0;i < str2.length();i++){
                sb2.append(a.charAt(b.indexOf(str2.charAt(i))));
            }
            System.out.println(sb1.toString());
            System.out.println(sb2.toString());
        }
    }
}