java语言把字母往后移一位

java语言把字母往后移一位

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package com.demo;

public class T {

static char A = 'A';

static char Z = 'Z';

static char a = 'a';

static char z = 'z';

public static void main(String[] args) {

String str = "abc123";

str = jiaMi(str);

System.out.println(str);

str=jieMi(str);

System.out.println(str);

}

public static String jiaMi(String str) {

char[] charArray = CharArray();

for (int i = 0; i < charArray.length; i++) {

if ((charArray[i]>=A&&charArray[i]<=Z)||(charArray[i]>=a&&charArray[i]<=z)) {

charArray[i]=(char)(charArray[i]+3);

}

}

str = new String(charArray);

return str;

}

public static String jieMi(String str) {

char[] charArray = CharArray();

for (int i = 0; i < charArray.length; i++) {

if ((charArray[i]>=A&&charArray[i]<=Z)||(charArray[i]>=a&&charArray[i]<=z)) {

charArray[i]=(char)(charArray[i]-3);

}

}

str = new String(charArray);

return str;

}

}