Java char type test using methods from Character class

Introduction

Methods in the Character Class

Method Description
isDigit(ch) Returns true if the specified character is a digit.
isLetter(ch) Returns true if the specified character is a letter.
isLetterOfDigit(ch) Returns true if the specified character is a letter or digit.
isLowerCase(ch) Returns true if the specified character is a lowercase letter.
isUpperCase(ch)Returns true if the specified character is an uppercase letter.
toLowerCase(ch) Returns the lowercase of the specified character.
toUpperCase(ch) Returns the uppercase of the specified character.

For example, 

public class Main {
   public static void main(String[] argv) throws Exception {
      System.out.println("isDigit('a') is " + Character.isDigit('a'));
      System.out.println("isLetter('a') is " + Character.isLetter('a'));
      System.out.println("isLowerCase('a') is " + Character.isLowerCase('a'));
      System.out.println("isUpperCase('a') is " + Character.isUpperCase('a'));
      System.out.println("toLowerCase('T') is " + Character.toLowerCase('T'));
      System.out.println("toUpperCase('q') is " + Character.toUpperCase('q'));

   }/* ww  w  .j  a  va2 s  .  c  om*/
}



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