You can use Java regular expressions to check if a String has only alphabets as follows:

[java]

package demo;

public class StringDemo {

public static void main(String[] args) { String str = “HelloWorld”; String regex = “^[a-zA-Z]+$”; boolean matches = str.matches(regex); System.out.println(matches);

} }

[/java]

 

The above code will print true when you run it. If you change the String str to have any other characters like numbers or special characters, it will print false.