我无法将ArrayList
自定义类写入文件。我在用着
public static void SaveEmployees() throws FileNotFoundException, IOException{
ObjectOutputStream save = new ObjectOutputStream(new FileOutputStream("magicscheduleEmp.sav");
save.writeObject(employeeList);
save.close();
}
where在 main 方法中employeeList
被声明并初始化为ArrayList
(我的类)的一个。Employees
我已经明确添加了对象employeeList
,但是调用会向文件中SaveEmployees
写入一个空ArrayList
的内容。该类Employee
是可序列化的。
我究竟做错了什么?
编辑:employeeList 在此处初始化(在 main 方法中)
public static ArrayList<Employee> employeeList = new ArrayList<>();
并通过用户输入填充(在另一个 jFrame 类中)
if(MainUI.addempcheck == true){
Employee newEmployee = new Employee(LastName.getText(), FirstName.getText());
newEmployee.position = EmpType.getSelectedItem().toString();
MainUI.employeeList.add(newEmployee);
MainUI.listModel.addElement(newEmployee.writeName().toString());
}
try {
MainUI.SaveEmployees();
} catch (FileNotFoundException ex) {
Logger.getLogger(NewEmployeeUI.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(NewEmployeeUI.class.getName()).log(Level.SEVERE, null, ex);
}
this.dispose();
我有一个按钮,它打印employeeList 的内容,并显示在我保存之前填充了该列表。也许调用 SaveEmployees 有问题?