[Q#2899301][A#2899335] How do I increment a variable to the next or previous letter in the alphabet?

https://stackoverflow.com/q/2899301

I have a capital letter defined in a variable string, and I want to output the next and previous letters in the alphabet. For example, if the variable was equal to 'C', I would want to output 'B' and 'D'.

Answer

https://stackoverflow.com/a/2899335

One way:

APIzation

String value = "C";
int charValue = value.charAt(0);
String next = String.valueOf( (char) (charValue + 1));
System.out.println(next);

package com.stackoverflow.api;

public class Human2899335 {

  public static char incrementValueToChar(char value, int increment) {
    char next = (char) (value + increment);
    System.out.println(next);
    return next;
  }
}

package com.stackoverflow.api;

/**
 * How do I increment a variable to the next or previous letter in the alphabet?
 *
 * @author APIzator
 * @see <a href="https://stackoverflow.com/a/2899335">https://stackoverflow.com/a/2899335</a>
 */
public class APIzator2899335 {

  public static String incrementVariable(String value) throws Exception {
    int charValue = value.charAt(0);
    String next = String.valueOf((char) (charValue + 1));
    return next;
  }
}