//PROGRAM 11-27
class DemoSetCharAt {  
  public static void cetakIsi(StringBuffer sb) {
    for (int i=0; i<sb.length(); i++) {
      System.out.println("Karakter ke-" + i + 
        " : " + sb.charAt(i));
    }
  }
  
  public static void main(String[] args) {
        
    StringBuffer sb = new StringBuffer("Java");
        
    System.out.println("Sebelum diset");
    System.out.println("sb : " + sb);
    cetakIsi(sb);
    
    
    sb.setCharAt(1, 'o');
    sb.setCharAt(2, 'w');
    sb.setCharAt(3, 'o');
    
    System.out.println("\nSetelah diset");
    System.out.println("sb : " + sb);
    cetakIsi(sb);
  }
}