methods in the class characters java
public static char toUpperCase(char argument) \\ returns upper case
of letter
public static char toLowerCase(char argument) \\ returns lower case
of letter
public static boolean isUpperCase(char argument) \\ returns true if it is an uppercase letter else returns false
public static boolean isLowerCase(char argument)
\\ returns true if it is an Lowercase letter else returns false
public static boolean is lower case char argument
public static iswhitespace(char argument)
\\returns true if the argument is a whitespace carrier otherwise returns false. a white space character is either a space character tab character (‘\t’), and the line break character (‘\n’)
public static isLetter(char argument)
\\returns true if the argument is a letter otherwise returns false
public static isDigit(char argument)
\\returns true if the argument is a digit otherwise returns false
public static isLetterOrDigit(char argument)
\\returns true if the argument is a letter or a digit otherwise returns false