题解 | #字符串加解密#
字符串加解密
http://www.nowcoder.com/practice/2aa32b378a024755a3f251e75cbf233a
import java.util.Scanner;
public class Main{ public static void main(String args[]){ Scanner sc = new Scanner(System.in); String s1= sc.nextLine(); String s2= sc.nextLine();
char[] chars = s1.toCharArray();
for (int i = 0; i < chars.length; i++) {
if(Character.isDigit(chars[i])) {
if(chars[i] == '9'){
chars[i]='0';
}else{
chars[i] = (char) (chars[i] + 1);
}
}else if(Character.isLetter(chars[i])){
if(Character.isLowerCase(chars[i])){
char c = Character.toUpperCase(chars[i]);
if(c == 'Z'){
chars[i]='A';
}else{
chars[i]= (char) (c+1);
}
}else{
char c = Character.toLowerCase(chars[i]);
if(c == 'z'){
chars[i]='a';
}else{
chars[i]= (char) (c+1);
}
}
}
}
char[] chars1 = s2.toCharArray();
for (int i = 0; i < chars1.length; i++) {
if(Character.isDigit(chars1[i])) {
if(chars1[i] == '0'){
chars1[i]='9';
}else{
chars1[i] = (char) (chars1[i] -1);
}
}else if(Character.isLetter(chars1[i])){
if(Character.isLowerCase(chars1[i])){
char c = Character.toUpperCase(chars1[i]);
if(c == 'A'){
chars1[i]='Z';
}else{
chars1[i]= (char) (c-1);
}
}else{
char c = Character.toLowerCase(chars1[i]);
if(c =='a'){
chars1[i]='z';
}else{
chars1[i]= (char) (c-1);
}
}
}
}
StringBuilder sb1 = new StringBuilder();
for(char c:chars){
sb1.append(c);
}
StringBuilder sb2 = new StringBuilder();
for(char c:chars1){
sb2.append(c);
}
System.out.println(sb1.toString());
System.out.println(sb2.toString());
}
}
