import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTabbedPane;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class TestApp {
	public static void main(String[] args) throws ClassNotFoundException, InstantiationException,
			IllegalAccessException, UnsupportedLookAndFeelException {
		UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
		JFrame fr = new JFrame("test");
		fr.setSize(500, 500);
		JTabbedPane tp = new JTabbedPane();
		tp.addTab("AAAA", new JLabel("test"));
		tp.addTab("BBB", new JLabel("test"));
		fr.getContentPane().add(tp);
		fr.setVisible(true);
	}
}