Question

How to decrypt a string from numbers to characters in Java

Answer 1

public class MyClass {
    private static char convert_to_char_code(String str) {
        int num = Integer.parseInt(str);
        
        return (char)(num + 96);
    }
    
    private static String decrypt(String s) {
    	StringBuilder sb = new StringBuilder();
        
        int i = 0;
        while( i < s.length() - 2) {
            char ch;
            if (s.charAt(i + 2) == '#') {
                ch = (char)convert_to_char_code(s.substring(i, i + 2));
                i += 2;
            } else {
                ch = (char)convert_to_char_code(s.substring(i, i + 1));
            }
            
            i++;
            
            sb.append(ch);
        }

        return sb.toString();
    }
    
    public static void main(String args[]) {
        System.out.print(decrypt("10#1426#25#524#"));
    }
}






/*
run:

jadzyex

*/

 

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