题解 | #字符串加解密#
https://www.nowcoder.com/practice/2aa32b378a024755a3f251e75cbf233a
import java.util.*;
public class Main {
static String plainDict = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
static String encryptDict = "BCDEFGHIJKLMNOPQRSTUVWXYZAbcdefghijklmnopqrstuvwxyza1234567890";
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String plainText = scanner.nextLine();
System.out.println(encrypt(plainText));
String encrypted = scanner.nextLine();
System.out.println(decrypt(encrypted));
}
private static String encrypt(String plainText){
StringBuilder sb = new StringBuilder();
for (char ch : plainText.toCharArray()) {
sb.append(encryptDict.charAt(plainDict.indexOf(ch)));
}
return sb.toString();
}
private static String decrypt(String encrypted){
StringBuilder sb = new StringBuilder();
for (char ch : encrypted.toCharArray()) {
sb.append(plainDict.charAt(encryptDict.indexOf(ch)));
}
return sb.toString();
}
}
