private void addOximata(){
	/*
	 * vazei ta oximata apo thn vash sthn dropdown lista
	 */
	ArrayList<String> oximata=con.getOximata(); //pairnei ta oximata apo tin vasi kai ta apothikeui sthn ArrayList<String>
	for(int i=0;i<oximata.size();i++){
		oximataBox.addItem(oximata.get(i)); //prostheti to oxima sthn dropdown lista
	}
}