JFrame - 使用 JComponent 和 MouseListener 进行鼠标单击

2022-01-24 00:00:00 java swing mouselistener jframe jcomponent

有 2 个班级 -

public class MainClass {



  public static void main(String[] args)  {
    JFrame frame = new JFrame();
    ....
    Component mouseClick = new MyComponent()  ; 
    frame.setVisible(true);
}

public class MyComponent extends JComponent implements MouseListener {

    @Override
    public void mouseClicked(MouseEvent arg0) {
        System.out.println("here was a click ! ");

    }
    ...

}

我试图在 frame 上设置鼠标单击的侦听器，但是当我运行它然后按下鼠标单击时没有任何反应.

I trying to set on the frame a listener for mouse click , but when I run it and then press mouse click nothing happens .

如何使它工作?

推荐答案

为了在你的框架上接收鼠标点击，你还需要将 mouseClick 添加到框架的 MouseListeners 列表中/代码>.创建 mouseClick 后尝试添加此行:
In order to receive mouse clicks on your frame, you also need to add mouseClick to the frame's list of MouseListeners. Try adding this line after you create mouseClick: frame.addMouseListener((MouseListener) mouseClick);

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