Characters

Objectives

We would like to :

Discuss Character Methods.

Notes

Remember, read in with myScanner.next().charAt(0)
There are some useful character functions
- reference.
- bool Character.isDigit(ch)
- bool Character.isLetter(ch)
- bool Character.isLetterOrDigit(ch)
- bool Character.isLowerCase(ch)
- bool Character.isUpperCase(ch)
- bool Character.isWhitespace(ch)
- char Character.toUpperCase(ch)
- char Character.toLowerCase(ch)

import java.util.Scanner;

public class CharDemo {
     public static void main(String[] args) {
    
        char ch = '\n';
        int code;

       
        Scanner myScanner = new Scanner(System.in);

        char ch = ' ';
        while (ch != 'Q') {
             System.out.print("Enter a letter => ");
             ch = myScanner.next().charAt(0);
             System.out.println();

             code = ch;

             System.out.printf("The letter is %c\n",ch);
             System.out.printf("The ASCII code for that is %d\n",code);

             if(Character.isLowerCase(ch)) {
                 System.out.println("It is a lower case letter");
             } else if (Character.isUpperCase(ch)){
                 System.out.println("It is an upper case letter");
             } else if (Character.isDigit(ch)) {
                 System.out.println("It is a digit");
             }
       }

     }
}