班级间交流 [英] Communicating between classes

问题描述

我有一个分为两类的表格.每个类代表表单的一部分上的小部件.允许这些类在彼此之间共享数据并相互更新的最佳方式是什么.

I have a form that is divided into two classes. Each class represents the widgets on part of the form. What is the best way to allow these classes to share data between each other and update each other.

示例:单击 A 类中的按钮.更新类 C 中的文本字段

Example: Button in class A is clicked. Update text field in class C

推荐答案

这是您可以做的很短的事情:

This is very short what you can do:

public class ButtonFrame extends JFrame implements ActionListener
{
     private TextFieldFrame frame;

     public ButtonFrame(TextFieldFrame frame)
     {
         this.frame = frame;
         // init your components and add this as actionlistener to the button
         ....
     }

     public void actionPerformed(ActionEvent evt)
     {
         frame.notifyButtonPressed();
     }
}

其他类:

public class TextFieldFrame extends JFrame
{
     private JTextField field = ...; // init in your constructor

     public void notifyButtonPressed()
     {
         field.setText("Yes man!! The button is pressed by the user!");
     }
}

再说一次，您要做的事情很短.
您还可以使用 Singleton 模式，但这是更好的方法.

Again, this is very short what you have to do.
You can also work with a Singleton pattern, but this is a better way.

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