Java tutorial
import java.awt.Frame; public class Main { public static void main(String[] argv) throws Exception { Frame frame = new Frame(); frame.setSize(300, 300); frame.setVisible(true); deiconify(frame); } public static void deiconify(Frame frame) { int state = frame.getExtendedState(); // Clear the iconified bit state &= ~Frame.ICONIFIED; // Deiconify the frame frame.setExtendedState(state); } }