Kelimeyi Harflerine Ayırma

import java.util.Scanner;
public class Harf{
    private StringIndexOutOfBoundsException xse;
    private int i = 0;
    private StringBuffer kelime = new StringBuffer();
    private char[] harfler = new char[10];
    private void girdi(){
        Scanner s1 = new Scanner(System.in);
        System.out.print("Kelimeyi giriniz: ");
        kelime = kelime.append(s1.nextLine());
    }
    public void harflerine_ayirma(){
        girdi();
        try{
            while(this.xse == null){
                harfler[i] = kelime.charAt(i);
                i++;
            }
        }
        catch(StringIndexOutOfBoundsException xse){
            this.xse = xse;
        }
    }
    private char harf_goruntule(int sira_no){
        return harfler[sira_no];
    }
    private void uygulama(){
        harflerine_ayirma();
        System.out.println(harf_goruntule(3));
    }
    public static void main(String[] args){
        Harf h1 = new Harf();
        h1.uygulama();
    }
}