java - 如何将鼠标点击结果发送到另一个jFrame'？

Question

我正在使用 netbeans IDE

我在“如何将 mouseClick 结果发送到另一个 jFrame”中遇到问题？

我设置TF_appID作为公众 SearchForNewAppointment jFrame

没有错误，但是当我单击表格时什么也没有出现？

        SearchForNewAppointment show = new SearchForNewAppointment();
        int row = appointment_table.getSelectedRow();
        String table_click = (appointment_table.getModel().getValueAt(row, 0).toString());

        String sql = "select * from appointment where app_id = '"+table_click+"' ";

        pst = conn.prepareStatement(sql);
        rs = pst.executeQuery();

        if(rs.next()){
           String add1 = rs.getString("app_id");
           show.TF_appID.setText(add1);
        }

Answer 1

为什么不使用事件中心？

public interface EventHub {
    void subscribe(String eventName, EventHandler handler);
    void publish(String eventName, Object context);
}

public interface EventHandler {
    void onEvent(Object context);
}

EventHub 是一个单例，它被注入(inject)到两个框架中。

public class Frame1 extends JFrame {
    public Frame1(final EventHub hub) {
        Button button = new Button("click-me");
        button.addAddActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent evt) {
              // for this simple event, the context is null. In the future,
              // more complex events might need some contextual info
              hub.publish("myCustomEvent", null);
           }
        });
        super.add(button);
    }
}

public class Frame2 extends JFrame {
    public Frame2(EventHub hub) {
        hub.subscribe("myCustomEvent", new EventHandler() {
            public void onEvent(Object context) {
               System.out.println("Button was clicked");
            }
        });
    }
}

这意味着发布与订阅是解耦的。这也意味着单个事件可以有多个监听器。