java OnSave方法与onload方法配合使用？

Question

我已经创建了一个onLoad方法来在我的程序中使用序列化，但我想同时使用onSave方法，这样当程序关闭并再次启动时，我就不必一次又一次地填充我的jlist了

我曾尝试创建自己的onSave函数，但在任何地方都无法实现

谁能给我举个例子，或者给我一个onSave函数，让我的序列化工作更高效

以下是我的onLoad（）方法：

private void onLoad()
    {//Function for loading patients and procedures
        File filename = new File("ExpenditureList.ser");
        FileInputStream fis = null;
        ObjectInputStream in = null;
        if(filename.exists())
        {
            try {
                fis = new FileInputStream(filename);
                in = new ObjectInputStream(fis);
                Expenditure.expenditureList = (ArrayList<Expenditure>) in.readObject();//Reads in the income list from the file
                in.close();
            } catch (Exception ex) {
                System.out.println("Exception during deserialization: " +
                        ex); 
                ex.printStackTrace();
            }
        }

以下是我对onSave方法的尝试：

try
              {
                 FileInputStream fileIn =
                                  new FileInputStream("Expenditure.ser");
                 ObjectInputStream in = new ObjectInputStream(fileIn);
                 expenditureList = (ArrayList<Expenditure>) in.readObject();


                 for(Expenditurex:expenditureList){
                        expenditureListModel.addElement(x);
                     }


                 in.close();
                 fileIn.close();
              }catch(IOException i)
              {
                 i.printStackTrace();
                 return;
              }catch(ClassNotFoundException c1)
              {
                 System.out.println("Not found");
                 c1.printStackTrace();
                 return;
              }