Character.isDigit() in Java

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

Approach 1: When the argument of type char.

Syntax:

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

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

Parameters: One parameter is required for this method.

ch: the character to be tested.

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

Exceptions: NA

Java

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

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

Output:

false

Approach 2: When the argument of type int.

Syntax:

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

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

Parameters: One parameter is required for this method.

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

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

Exceptions: NA

Java

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

        int codePoint = '0';
        System.out.println(Character.isDigit(codePoint));
    }
}

Output:

true