Open In App

Character.isLetterOrDigit() in Java with examples

Improve
Improve
Like Article
Like
Save
Share
Report

The java.lang.Character.isLetterOrDigit(char ch) is an inbuilt method in java which determines if the specified character is a letter or digit.

Syntax:

public static boolean isLetterOrDigit(char ch)

Parameters: The function accepts a single mandatory parameter ch which signifies the character to be tested.

Return value: This function returns a boolean value. The boolean value is true if the character is a letter or digit else it false.

Below programs illustrate the above method:

Program 1:




// Java program to illustrate the
// Character.isLetterOrDigit() method
  
import java.lang.*;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // two characters
        char c1 = 'Z', c2 = '2';
  
        // Function to check if the character is letter or digit
        boolean bool1 = Character.isLetterOrDigit(c1);
        System.out.println(c1 + " is a letter/digit ? " + bool1);
  
        // Function to check if the character is letter or digit
        boolean bool2 = Character.isLetterOrDigit(c2);
        System.out.println(c2 + " is a letter/digit ? " + bool2);
    }
}


Output:

Z is a letter/digit ? true
2 is a letter/digit ? true

Program 2:




// Java program to illustrate the
// Character.isLetterOrDigit() method
  
import java.lang.*;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // assign character
        char c1 = 'D', c2 = '/';
  
        // Function to check if the character is letter or digit
        boolean bool1 = Character.isLetterOrDigit(c1);
        System.out.println(c1 + " is a letter/digit ? " + bool1);
  
        // Function to check if the character is letter or digit
        boolean bool2 = Character.isLetterOrDigit(c2);
        System.out.println(c2 + " is a letter/digit ? " + bool2);
    }
}


Output:

D is a letter/digit ? true
/ is a letter/digit ? false

Reference: https://docs.oracle.com/javase/7/docs/api/java/lang/Character.html#isLetterOrDigit(char)



Last Updated : 06 Dec, 2018
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads