小编use*_*824的帖子

我在这里遇到了一些代码,而我正在尝试将字符串转换为ASCII值,从中减去30然后转换回字符串.

E.g. Enter -  hello
     Convert to - 104 101 108 108 111
     Subtract - 74 71 78 78 81
     display - JGNNQ

码:

import javax.swing.*;
public class practice {                    
   public static void main (String[] args) {

      String enc = "";
      String encmsg = "";
      String msg = JOptionPane.showInputDialog("Enter your message");
      int len = msg.length();
      for (int i = 0; i< len ; i++) {
         char cur = msg.charAt(i);
         int val = (int) cur;
         val = val -32;
         enc = …