Character Class

java.lang.Character class having some useful methods. Character class is a wrapper class for character data type.

Following function return type is boolean

isUpperCase() – Return true if given character is in Uppercase or else return false.

isLowerCase() – Return true if given character is in Lowercase or else return false.

isDigit() – Return true if given character is a digit or else return false.

isLetter() – Return true if given character is a alphabet or else return false.

isWhitespace() – Return true if given character is whitespace or else return false.

Java whitespace consists – space, tab (‘\t’),  form feed character (‘\r’).

toUpperCase() – Returns the given character in uppercase form.

toLowerCase() – Returns the given character in Lowercase form.

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//Character Class

    public class Character_Fun

        {

            public static void main(String args[])

                {

                    char ch='a';

                    System.out.println("\n\tCharacter '"+ch+"' is a Letter? - "+Character.isLetter(ch));

                    ch='a';

                    System.out.println("\tCharacter '"+ch+"' is Lowercase? - "+Character.isLowerCase(ch));

                    ch='A';

                    System.out.println("\tCharacter '"+ch+"' is Uppercase? - "+Character.isUpperCase(ch));

                    ch='\t';

                    System.out.println("\tCharacter '"+ch+"' is WhiteSpace? - "+Character.isWhitespace(ch));

                    ch='9';

                    System.out.println("\tCharacter '"+ch+"' is Digit? - "+Character.isDigit(ch));

                    ch='a';

                    System.out.println("\tCharacter '"+ch+"' Convert to Uppercase - "+Character.toUpperCase(ch));

                    ch='A';

                    System.out.println("\tCharacter '"+ch+"'  Convert to Lowercase - "+Character.toLowerCase(ch));

                   

               }

       }

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Output

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          Character 'a' is a Letter? - true

          Character 'a' is Lowercase? - true

          Character 'A' is Uppercase? - true

          Character '   ' is WhiteSpace? - true

          Character '9' is Digit? - true

          Character 'a' Convert to Uppercase - A

          Character 'A'  Convert to Lowercase – a

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