How to get the parent container of a JWindow in Swing?

问题

I have one JFrame and calling a JDialog from that frame while initializing. In the dialog have a JButton, when clicking on the button a new JWindow opens.

Can I fix the position of window in the main frame? How to access the parent container (JFrame extended) from JWindow extended class?

回答1:

Use SwingUtilities.getWindowAncestor, if inside the JWindow class, refer it as this, if no, simply put object inside:

JFrame topFrame = (JFrame) SwingUtilities.getWindowAncestor(this);

JFrame topFrame = (JFrame) SwingUtilities.getWindowAncestor(myJWindow);

来源：https://stackoverflow.com/questions/30122731/how-to-get-the-parent-container-of-a-jwindow-in-swing