Java Characters

isDigit() :

package charactersMethods;

public class isDigit {

public static void main(String[] args) {

System.out.println(Character.isDigit('a'));
System.out.println(Character.isDigit('5'));
System.out.println(Character.isDigit(5));
}

}

isLetter() :

package charactersMethods;

public class isLetter {

public static void main(String[] args) {

System.out.println(Character.isLetter('a'));
System.out.println(Character.isLetter('5'));
System.out.println(Character.isLetter(5));
}

}

isUppercase() \ isLowercase() :

package charactersMethods;

public class isUppercaseOrLowercase {

public static void main(String[] args) {

System.out.println(Character.isUpperCase(' '));
System.out.println(Character.isUpperCase('2'));
System.out.println(Character.isUpperCase('a'));
System.out.println(Character.isUpperCase('A'));
System.out.println(Character.isLowerCase('A'));
}

}

toUppercase() \ toLowercase() :

package charactersMethods;

public class toUppercaseOrLowercase {

public static void main(String[] args) {

System.out.println(Character.toLowerCase('c'));
System.out.println(Character.toLowerCase('C'));
System.out.println(Character.toUpperCase('c'));
System.out.println(Character.toUpperCase('C'));
}

}

isWhitespace() :

package charactersMethods;

public class isWhitespace {

public static void main(String[] args) {

System.out.println(Character.isWhitespace('\n'));
System.out.println(Character.isWhitespace(' '));
System.out.println(Character.isWhitespace('\t'));
}

}

toString() :

package charactersMethods;

public class toString {

public static void main(String[] args) {

System.out.println("Pring as string "+Character.toString('c'));
System.out.println("Pring as string "+Character.toString('2'));
System.out.println("Pring as string "+Character.toString('C'));
}

}