Java.lang.Character.isLetterOrDigit() Method



The java.lang.Character.isLetterOrDigit(int codePoint) determines if the specified character (Unicode code point) is a letter or digit.

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


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

public static boolean isLetterOrDigit(int codePoint)


codePoint − the character (Unicode code point) 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 int primitives cp1, cp2
      int cp1, cp2;

      // assign values to cp1, cp2
      cp1 = 0x0033;
      cp2 = 0x012b23;

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

       *  check if cp1, cp2 represents letter/digit and
       *  assign results to b1, b2
      b1 = Character.isLetterOrDigit(cp1);
      b2 = Character.isLetterOrDigit(cp2);

      String str1 = "cp1 represents a letter/digit is " + b1;
      String str2 = "cp2 represents 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 −

cp1 represents a letter/digit is true
cp2 represents a letter/digit is false