Question

How to determine if a character is a letter or digit in Java

Answer 1

public class MyClass {
    public static void main(String args[]) {
        char ch = 'w';
 
        boolean b;
 
        b = Character.isLetterOrDigit(ch);
        System.out.println(b);
        
        b = Character.isLetterOrDigit('7');
        System.out.println(b);
        
        b = Character.isLetterOrDigit(0x0031);
        System.out.println(b);
        
        b = Character.isLetterOrDigit(0x1FF3E);
        System.out.println(b);
        
        b = Character.isLetterOrDigit('\n');
        System.out.println(b);
    }
}

 
 
 
/*
run:
      
true
true
true
false
false
   
*/

 

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Answer 2

public class MyClass {
    public static void main(String args[]) {
        char ch = 'A';

        String LetterOrDigit = (Character.isLetterOrDigit(ch)) ? "yes" : "no";
    
        System.out.println(LetterOrDigit);
    }
}

 
 
 
/*
run:
      
yes
   
*/

 

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