//winkel.java
    public void read( File file ) {
        try{
            ObjectInputStream in = new ObjectInputStream(new FileInputStream(file));
            System.out.println(file);
            while(in != null){
                ingelezenCd = (Cd) in.readObject(); 
                cdWinkel.add(ingelezenCd);
            }
            in.close();

        }
        catch(IOException i){
            i.printStackTrace();
        }
        catch(ClassNotFoundException c){
            c.printStackTrace();
        }
    }
//end

//GUI.java
    private void performOpen() {
        final JFileChooser fc = new JFileChooser();
        int returnVal = fc.showOpenDialog(this);
        if (returnVal == JFileChooser.APPROVE_OPTION) {
            File file = fc.getSelectedFile();
            winkel.read(file);
        }
       
    }
//