Wu Yuxiong - natural born JAVA development of learning: Character Class

char CH = 'A' ; 
 
// the Unicode character representation of 
char unichar = '\ u039A' ; 
 
// character array 
char [] = {charArray 'A', 'B', 'C', 'D', 'E' };

public class Test {

    public static void main(String args[]) {
        System.out.println(Character.isLetter('c'));
        System.out.println(Character.isLetter('5'));
    }
}

public class Test {

    public static void main(String args[]) {
        System.out.println(Character.isDigit('c'));
        System.out.println(Character.isDigit('5'));
    }
}

public class Test {
 
    public static void main(String args[]) {
        System.out.println(Character.isWhitespace('c'));
        System.out.println(Character.isWhitespace(' '));
        System.out.println(Character.isWhitespace('\n'));
        System.out.println(Character.isWhitespace('\t'));
    }
}

public class Test {

    public static void main(String args[]) {
        System.out.println( Character.isUpperCase('c'));
        System.out.println( Character.isUpperCase('C'));
    }
}

public class Test {

    public static void main(String args[]) {
        System.out.println( Character.isLowerCase('c'));
        System.out.println( Character.isLowerCase('C'));
    }
}

public class Test {

    public static void main(String args[]) {
        System.out.println(Character.toUpperCase('a'));
        System.out.println(Character.toUpperCase('A'));
    }
}

public class Test {

    public static void main(String args[]) {
        System.out.println(Character.toLowerCase('a'));
        System.out.println(Character.toLowerCase('A'));
    }
}

public class Test {

    public static void main(String args[]) {
        System.out.println(Character.toString('a'));
        System.out.println(Character.toString('A'));
    }
}