How can I refresh a JPanel in a JTabbedPane only if that tab is the one that is visible?

Question

我有一个窗格，我需要重建内容，然后将其与当前面板交换，但前提是它是当前选项卡。

Answer 1

You can simply do this:

final int nTabIndex = myTabbedPane.indexOfTabComponent( myPanel );
final boolean bIsVisible = myTabbedPane.isEnabledAt( nTabIndex );
if ( bIsVisible ) {
    // Do stuff with myPanel
    myPanel.repaint();
}