Java中的关闭窗口（JPanel）

获取顶层窗口：

public void actionPerformed(ActionEvent e) {  JComponent comp = (JComponent) e.getSource();  Window win = SwingUtilities.getWindowAncestor(comp);  win.dispose();}

确保已将Jframe的默认关闭操作设置为

Jframe.DISPOSE_ON_CLOSE

Jframe.EXIT_ON_CLOSE

如果有可能会从JMenuItem调用此方法，那么除非您首先测试组件的父级是JPopupMenu还是JToolBar，否则它将不起作用。如果是这样，那么您应该使用更健壮的解决方案，例如可以在java-
swing-tips上找到
，特别是以下代码：

class ExitAction extends AbstractAction {    public ExitAction() {        super("Exit");    }    @Override public void actionPerformed(ActionEvent e) {        JComponent c = (JComponent) e.getSource();        Window window = null;        Container parent = c.getParent();        if (parent instanceof JPopupMenu) { JPopupMenu popup = (JPopupMenu) parent; JComponent invoker = (JComponent) popup.getInvoker(); window = SwingUtilities.getWindowAncestor(invoker);        } else if (parent instanceof JToolBar) { JToolBar toolbar = (JToolBar) parent; if (((BasicToolBarUI) toolbar.getUI()).isFloating()) {     window = SwingUtilities.getWindowAncestor(toolbar).getOwner(); } else {     window = SwingUtilities.getWindowAncestor(toolbar); }        } else { Component invoker = c.getParent(); window = SwingUtilities.getWindowAncestor(invoker);        }        if (window != null) { //window.dispose(); window.dispatchEvent(new WindowEvent(window, WindowEvent.WINDOW_CLOSING));        }    }}

来源：WindowClosingAction