import java.awt.BorderLayout;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JSplitPane;
public class TouchExpandableSplitPane {
public static void main(String args[]) {
JFrame frame = new JFrame("Property Split");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
splitPane.setContinuousLayout(true);
splitPane.setOneTouchExpandable(true);
JComponent topComponent = new JButton("A");
splitPane.setTopComponent(topComponent);
JComponent bottomComponent = new JButton("B");
splitPane.setBottomComponent(bottomComponent);
frame.add(splitPane, BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
}
}