Java.lang.Character.isLetterOrDigit() Method



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

A character is considered to be a letter or digit if either Character.isLetter(char ch) or Character.isDigit(char ch) returns true for the character.


Following is the declaration for java.lang.Character.isLetterOrDigit() method

public static boolean isLetterOrDigit(char ch)


ch − the character to be tested

Return Value

This method returns true if the character is a letter or digit, false otherwise.




The following example shows the usage of lang.Character.isLetterOrDigit() method.

package com.tutorialspoint;

import java.lang.*;

public class CharacterDemo {

   public static void main(String[] args) {

      // create 2 char primitives ch1, ch2
      char ch1, ch2;

      // assign values to ch1, ch2
      ch1 = 'A';
      ch2 = '1';

      // create 2 boolean primitives b1, b2
      boolean b1, b2;

       *  check if ch1, ch2 are letter or digit and assign
       *  results to b1, b2
      b1 = Character.isLetterOrDigit(ch1);
      b2 = Character.isLetterOrDigit(ch2);

      String str1 = ch1 + " is a letter/digit is " + b1;
      String str2 = ch2 + " is a letter/digit is " + b2;

      // print b1, b2 values
      System.out.println( str1 );
      System.out.println( str2 );

Let us compile and run the above program, this will produce the following result −

A is a letter/digit is true
1 is a letter/digit is true