Java isLetter() - Character

Character.isLetter(chObj);

package com.java.myapp;

public class MyClass {

    public static void main(String[] args) {
         
    	char a = 'a';
    	Character b = new Character('5');
    	Character c = 'A';
    	
    	 System.out.println(Character.isLetter(a));
    	 System.out.println(Character.isLetter(b));
    	 System.out.println(Character.isLetter(c));
        	    	
    }
	
}