JDesktopPane.setSelectedFrame(JInternalFrame f) has the following syntax.
public void setSelectedFrame(JInternalFrame f)
In the following code shows how to use JDesktopPane.setSelectedFrame(JInternalFrame f) method.
//from ww w.ja v a2s. c o m import java.awt.BorderLayout; import javax.accessibility.AccessibleContext; import javax.swing.JDesktopPane; import javax.swing.JFrame; import javax.swing.JInternalFrame; import javax.swing.JLabel; public class Main { public static void main(final String args[]) { JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JDesktopPane desktop = new JDesktopPane(); JInternalFrame iFrame = new JInternalFrame("Can Do All", true, true, true, true); JInternalFrame internalFrames[] = { iFrame, new JInternalFrame("Not Resizable", false, true, true, true), new JInternalFrame("Not Closable", true, false, true, true), new JInternalFrame("Not Maximizable", true, true, false, true), new JInternalFrame("Not Iconifiable", true, true, true, false) }; int pos = 0; for (JInternalFrame internalFrame : internalFrames) { desktop.add(internalFrame); internalFrame.setBounds(pos * 25, pos * 25, 200, 100); pos++; JLabel label = new JLabel(internalFrame.getTitle(), JLabel.CENTER); internalFrame.add(label, BorderLayout.CENTER); internalFrame.setVisible(true); } desktop.setSelectedFrame(iFrame); frame.add(desktop, BorderLayout.CENTER); frame.setSize(500, 300); frame.setVisible(true); } }