Character.isLetter() in Java

Character.isLetter(): This method is available in java.lang.Character class of Java.

Approach 1: When the argument is of type char.

Syntax:

boolean java.lang.Character.isLetter(char ch)

This method takes one argument of type char as its parameter. This method determines if the specified character is a letter.

Parameters: One parameter is required for this method.

ch: the character to be tested.

Returns: true if the character is a letter; false otherwise.

Exceptions: NA

Java

public class CharacterisLetter {
    public static void main(String[] args) {

        char ch = 'a';
        System.out.println(Character.isLetter(ch));
    }
}

Output:

true

Approach 2: When the argument is of type int.

Syntax:

boolean java.lang.Character.isLetter(int codePoint)

This method takes one argument takes one argument of type int as its parameter. This method determines if the specified character (Unicode code point) is a letter.

Parameters: One parameter is required for this method.

codePoint: the character (Unicode code point) to be tested.

Returns: true if the character is a letter; false otherwise.

Exceptions: NA

Java

public class CharacterisLetterint {
    public static void main(String[] args) {

        int codePoint = 'A';
        System.out.println(Character.isLetter(codePoint));
    }
}

Output:

true