Question

java 如何获得被选中的子窗口。

在程序中建了很多子窗口（用新建实现的），如何获得当前鼠标被选中的窗口，还有，工具也是子窗口实现的，点了工具上的按钮如何使焦点回到上面提到的子窗口

Answer 1

(1) you might want to listen to the FocusEvent on component level and/or WindowEvent on frame/dialog level or addWindowFocusListener

(2) you can make the toolbar window unfocusable by setFocusable(false)

Answer 2

调用需要焦点窗口的.requestFocus()方法