Java tutorial
import java.awt.BorderLayout; import javax.swing.JButton; import javax.swing.JComponent; import javax.swing.JFrame; import javax.swing.JSplitPane; public class Main { 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); } }