Java 在何处实现onSave和onLoad函数以创建可序列化文件

我创建了这两个函数，并将它们添加到按钮内的动作侦听器中。目的是创建一个序列化文件，并将Jlist中的内容写入该文件。当程序关闭时，应使用序列化文件中的内容填充jlist。由于某种原因，它不起作用。有人能看出哪里出了问题吗

代码如下：

        JButton btnAdd = new JButton("Add"); // Setting what is written on the button

        btnAdd.addActionListener(new ActionListener() { // implementing an action listener


            public void actionPerformed(ActionEvent arg0) {

                patientname = textField.getText(); // Getting the patient name from the textfield
                patientaddress = textField_1.getText();
                patientphone = textField_2.getText();


                textField.setText(""); // Setting the textfield to be blank so that the user can input there name address etc..
                textField_1.setText("");
                textField_2.setText("");

                patientid = patientid + 1;//Implementing the id to add 1 every time another id is added

                Patient patient = new Patient(patientname, patientaddress, patientphone, patientid); // Populating the array list patientlist with the users input
                patientList.add(patient); // Adding the patient's details to the patientlist

                patientListModel.addElement(patient); // adds the patient's details to the list model


            }

            public void onSave(List<Patient> PatientList) {
    ObjectOutputStream out = null;
    try {
        out = new ObjectOutputStream(new FileOutputStream(new File("PatientList.ser")));
        out.writeObject(PatientList);
        out.flush();
    }
    catch (IOException e) {
        // handle exception
    }
    finally {
        if (out != null) {
            try {
                out.close();
            }
            catch (IOException e) {
                // handle exception
            }
        }
    }
}

public List<Patient> onLoad() {
    ObjectInputStream in = null;
    try {
        in = new ObjectInputStream(new FileInputStream(new File("PatientList.ser")));
        return (List<Patient>) in.readObject();
    }
    catch (IOException e) {
        // handle exception
    }
    catch (ClassNotFoundException e) {
        // handle exception
    }
    finally {
        if (in != null) {
            try {
                in.close();
            }
            catch (IOException e) {
                // handle exception
            }
        }
    }
    return null;
}



        });


        btnAdd.setBounds(0, 86, 65, 23);
        contentPane.add(btnAdd);

---

您收到了哪些错误？

Patient

类的代码可能也很有趣。我没有收到任何错误。但它从未创建序列化文件，当程序关闭时，以前的jlists条目不会加载。现在我将把我的患者类添加到问题中您确定调用了

onsave

？如果不抛出异常，它就无法工作是很不寻常的。我假设这是一个输入错误，但是您的

Patient

类需要实现

Serializable

。在catch块中打印一条消息（或者删除它，因为它可能会扼杀您收到的任何错误）。我不确定。我认为没有人叫它。我试图调用它，但在尝试调用时收到错误消息。错误消息是什么？

public class Patient {


    public String patientName;
    public String patientAddress;
    public String patientPhone;
    public int patientID;




    public Patient(String patientname, String patientaddress, String patientphone,int patientid){


        patientName = patientname;
        patientAddress = patientaddress;
        patientPhone = patientphone;
        patientID = patientid;


    }



    public String setName(String patientname){

        return patientName = patientname;



    }

    public String getName(){

        return patientName;

    }

    public String setAddress(String patientaddress){

        return patientAddress = patientaddress;


    }

    public String getAddress(){

        return patientAddress;
    }



    public String setPhoneNum(String patientphone){
        return patientPhone = patientphone;

    }

    public String getPhoneNum(){

        return patientPhone;
    }

 public int setID(int patientid){

        return patientID = patientid;



    }

    public int getID(){

        return patientID;

    }




    public String toString() { // Printing the patient's details to the scroll pane
        return "Patient Name: " + patientName + ", PatientAddress: "
                + patientAddress + ", PatientPhone: " + patientPhone
                + ", patientID: " + patientID +"" ;
    }

}