ComponentListener.componentShown(ComponentEvent e) has the following syntax.
void componentShown(ComponentEvent e)
In the following code shows how to use ComponentListener.componentShown(ComponentEvent e) method.
// w ww .j av a2 s .c o m import java.awt.event.ComponentEvent; import java.awt.event.ComponentListener; import javax.swing.JFrame; public class Main implements ComponentListener { @Override public void componentShown(ComponentEvent evt) { System.out.println(evt.paramString()); } @Override public void componentResized(ComponentEvent e) { } @Override public void componentMoved(ComponentEvent e) { } @Override public void componentHidden(ComponentEvent e) { } public static void main(String[] args) { JFrame frame = new JFrame(""); frame.pack(); frame.addComponentListener(new Main()); frame.setVisible(true); } }