序列化打破所有按钮

Question

尝试通过序列化保存我的Java程序时遇到了一个问题：加载后，按钮不再起作用。从调试我可以告诉我正在调用我的load方法并对数据进行反序列化。下面是我的Driver和FileIO课程，提前感谢任何提示。

`

public class Driver {
static FileIO go;
static Display ack;
public static int result;


public static void main(String[] args) {
    JOptionPane loader = new JOptionPane();
    result = loader.showConfirmDialog(null, "Would you like to load a character?");
    if(result == 0){
        go = new FileIO(true);
        ack = go.load();
    }
    else if(result == 1){
        go = new FileIO(false);
        ack = new Display();
    }
    else{
        System.exit(0);
    }

    Bar bar = new Bar();
    ack.add(bar);
    ack.setVisible(true);

}

}`

public class FileIO {
private String output;
private File file;
File written;


public String getOutput() {
    return output;
}


public void setOutput(String output) {
    this.output += output;
}


public FileIO(boolean isLoading) {
    if(isLoading){
        JTextArea ta = new JTextArea(20,30);
        JFileChooser chooser = new JFileChooser();
        int status = chooser.showOpenDialog(null);

        if(status != JFileChooser.APPROVE_OPTION){
            ta.setText("No File Chosen");
        }
        else{
            file = chooser.getSelectedFile();
        }

    }
    else{
        try{
            File dir = new File("C:\\RPG Toolbar");
            dir.mkdir();
            file = new File("C:\\RPG Toolbar\\Hero.ser");

            if(file.createNewFile()){
                System.out.println("New Hero Made");
            }
            else{
                file = file.createTempFile("Hero", ".ser", dir);
                System.out.println("New Hero Made (with random num)");
            }
        }

        catch(Exception e){
            System.out.println("Send halp!");
        }
    }

}

public void save(){
    try{
        // Serialize data object to a file
        FileOutputStream fileOut = new FileOutputStream(file);
        ObjectOutputStream out = new ObjectOutputStream(fileOut);
        out.writeObject(Driver.ack);
        out.close();

        // Serialize data object to a byte array
        /*ByteArrayOutputStream bos = new ByteArrayOutputStream() ;
        out = new ObjectOutputStream(bos) ;
        out.writeObject(Driver.ack);
        out.close();*/
        System.out.println("Saved!");
    }
    catch(Exception e){
        System.out.println("Save failed!");
    }
}

public Display load(){
    Display x = null;

    try{
        FileInputStream door = new FileInputStream(file);
        ObjectInputStream reader = new ObjectInputStream(door);
        x = (Display) reader.readObject();
        door.close();
        reader.close();
        System.out.println("Loaded!");
        }
    catch (Exception e){ 

        }

    return x;

}

}

请保持温和，我是Swing的新手，也是序列化的新手。