class ThrowsDemo {   
  public static char vypis(String s) 
    throws java.io.IOException { 
 
    System.out.print(s + ": "); 
    return (char) System.in.read();  
  }   
 
  public static void main(String args[]) { 
    char ch; 
 
    try { 
      ch = vypis("Napis pismeno"); 
    } 
    catch(java.io.IOException e) { 
      System.out.println("nastala I/O vyjimka"); 
      ch = '?'; 
    } 
 
    System.out.println("napsal jsi " + ch); 
  } 
}