if char in java code example

Example 1: how to check if a char is a letter java

Character.isDigit(string.charAt(index)) //(JavaDoc) will return true if it's a digit
Character.isLetter(string.charAt(index)) //(JavaDoc) will return true if it's a letter

Example 2: if operator == java char

if(operator == 'a') //Characters or Char must be put in ''
{
  
}