我正在尝试使用多线程在Java(Swing)中实现MVC范例。目前,我正在使用Observer类和带有Observable类的Model类扩展View类,并且它的工作正常(我的代码是这个例子:http://austintek.com/mvc/)。控制器类只调用相应的模型和视图函数,并且有一个主要的“粘合”程序来设置所有内容。但是,这种方法不使用线程。 有没有办法通过同时使用线程和 Observer / Observable类来实现它?
(我的目标是将M,V和C中的每一个作为单独的线程实现)
以下是我的观看代码的一部分:
public class View implements Observer
{
/*************************************** View *************************************
**
** This function is the constructor of the View class.
**
** PRE: <nothing>
** POST: the GUI is created and the directory is displayed on the screen.
** RETURN: <N/A>
**
**/
View(String name)
{
threadName = name;
//frame in constructor and not an attribute as doesn't need to be visible to whole class
JFrame frame = new JFrame("simple MVC");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
addElements(frame); // this is implemented separately
// frame.addWindowListener(new CloseListener());
frame.setSize(900, 732);
// frame.setLocation(100,100);
/** Display the window **/
//frame.pack();
frame.setVisible(true);
}// View
以下是我的模型代码的一部分:
public class Model extends java.util.Observable
{
/****************** variable DECLARATIONS *********************/
// The hash table in which the directory is stored
private Hashtable<String, Integer> tel_dir
= new Hashtable<String, Integer>();
// The path of the telephone directory during runtime
private URL filePath
= Model.class.getClassLoader().getResource("directory.txt");
// the name of the thread
private String threadName;
/****** private Thread t; ******/
// the object in which the message is sent to the view
private Message message = new Message();
/** GETTERS and SETTERS **/
....
/*************************************** Model *************************************
**
** This function is the constructor of the model class.
**
** PRE: <nothing>
** POST: the telephone directory is input from the file and stored in a hash
** table.
** RETURN: <N/A>
**
**/
Model(String name)
{
int phone_num;
String customer_name;
Scanner scanner = null;
threadName = name;
/** Opening the handle to the file containing the telephone directory **/
try
{
scanner = new Scanner(new File(filePath.getPath()));
}
catch (FileNotFoundException e1)
{
e1.printStackTrace();
}
/** Inputting from the file and storing it in the hash table **/
while (scanner.hasNextInt())
{
phone_num = scanner.nextInt();
customer_name = scanner.nextLine();
customer_name = customer_name.trim();
tel_dir.put(customer_name, phone_num);
}
}// Model
答案 0 :(得分:3)
我的目标是将M,V和C中的每一个实现为一个单独的线程。
这可能不是一个有用的部门。必须在event dispatch thread上构建和操作仅的Swing视图,并且用户希望Swing控件保持响应,如here所述。
相反,在SwingWorker
的后台运行任何耗时的模型,并在process()
的实现中更新监听视图。在此example中,视图组件会直接更新,但您也可以按照建议here为已注册的侦听器触发自定义事件。在此example中,chart
通过series
收听其数据模型SeriesChangeEvent
;它响应process()
中工人的更新。您可以按照建议here或here通过PropertyChangeEvent
显示进度。