@Override
    public String toString() {
		StringBuilder result = new StringBuilder();
		  String newLine = System.getProperty("line.separator");

		  result.append( this.getClass().getName() );
		  result.append( " Object {" );
		  result.append(newLine);

		  //determine fields declared in this class only (no fields of superclass)
		  Field[] fields = this.getClass().getDeclaredFields();

		  //print field names paired with their values
		  for ( Field field : fields  ) {
		    result.append("  ");
		    try {
		      result.append( field.getName() );
		      result.append(": ");
		      //requires access to private field:
		      result.append( field.get(this) );
		    } catch ( IllegalAccessException ex ) {
		      System.out.println(ex);
		    }
		    result.append(newLine);
		  }
		  result.append("}");

		  return result.toString();
    }