Java访问通过MouseEvent单击了JButton的公共方法(Java access clicked JButton's public methods by the MouseEven

Java访问通过MouseEvent单击了JButton的公共方法(Java access clicked JButton's public methods by the MouseEvent)

我想在/我的鼠标事件中传递/访问参数。

public class Button extends JButton{ public int fileID=6; public int getButtonID(){ return fileID; } } [View.java] Button1.addMouseListener(controller); [Controller.java] public void mousePressed(MouseEvent e) { System.out.println(e.getButtonID()); //not working System.out.println(e.getSource().getButtonID()); //not working

基本上，我需要的是对点击按钮的某种引用，所以我可以得到它的fileID。 这可能吗？ 每个按钮代表一个文件，我想让用户删除它。 请告诉我是否有更好的方法来获取用户点击的信息。

谢谢

I want to pass/access a parameter to/in my Mouse Event.

public class Button extends JButton{ public int fileID=6; public int getButtonID(){ return fileID; } } [View.java] Button1.addMouseListener(controller); [Controller.java] public void mousePressed(MouseEvent e) { System.out.println(e.getButtonID()); //not working System.out.println(e.getSource().getButtonID()); //not working

Basically, what I need is some kind of reference to the clicked button so I can get its fileID. Is this possible? Each button represents a file and I want to give the user the possibility to delete it. Please tell me if there is a better way to obtain the information where the user has clicked.

Thanks

最满意答案

如果你可以确定你的Controller只会被添加到Button ，那么为什么不将e.getSource()为Button呢？

((Button) e.getSource()).getButtonID()

但是，您也可以在Controller的构造函数中使用Button并使用它（您无法获得ClassCastException ，因为它必须是Button 。）

If you can be sure your Controller will only ever be added to a Button, then why not cast e.getSource() to Button?

((Button) e.getSource()).getButtonID()

However, you can also take the Button in the constructor of Controller and use that (you can't get a ClassCastException that way as it has to be a Button.)