Focus auf anderen Tab

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;


import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;
import javax.swing.JTextArea;
/*
 * Created on 05.06.2004
 *
 */


/**
 * @author benjamin ferrari
 *  
 */
public class Frame1 extends JFrame {
    private static final String NL = System.getProperty("line.separator");
    private JTabbedPane tpane;
    private JTextArea resultArea;

    public Frame1() {
        JPanel contentPane = new JPanel();
        JPanel formTab = new JPanel();
        JPanel resultTab = new JPanel();
        resultArea = new JTextArea();
        JScrollPane scrollPane = new JScrollPane(resultArea);

        JButton button = new JButton("search");
        tpane = new JTabbedPane();


        this.setContentPane(contentPane);
        contentPane.setLayout(new BorderLayout());


        formTab.add(button);
        resultTab.setLayout(new BorderLayout());
        resultTab.add(scrollPane);

        tpane.addTab("Tab 1", formTab);
        tpane.addTab("Tab 2", resultTab);


        contentPane.add(tpane);


        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                searchAction();
            }
        });
    }

    private void searchAction(){
        //search...

        //select results tab:
        tpane.setSelectedIndex(1);

        //show search results
        resultArea.append("next searchresult "+NL);
        resultArea.append("next searchresult "+NL);
        resultArea.append("... "+NL);
    }

    public Dimension getPreferredSize() {
        return new Dimension(200, 200);
    }


    public static void main(String[] args) {


        Frame1 frame = new Frame1();
        frame.pack();
        frame.setVisible(true);


    }
}