public class Student extends Person {

   private String uni;

   public Student (String zuname, String vorname,
         String uni) {
      super (zuname, vorname);
      this.uni = uni;
    }
 
   protected void setUni (String uni) {
      this.uni = uni;
   }
   public String getUni() {
      return this.uni;
   }
 
  public String toString() {
      String s;
      s = super.toString() + ", studiert an " + uni;
      return s;
   }
}