Create a Vertical Split JSplitPane in Java

import java.awt.BorderLayout;
import java.awt.Dimension;
//  w w w .j a  v a 2  s . co m
import javax.swing.JFrame;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;

public class Main extends JFrame {

  static String sometext = "This is a test from java2s.com.";

  public Main() {
    setSize(450, 200);
    setDefaultCloseOperation(EXIT_ON_CLOSE);

    JTextArea jt1 = new JTextArea(sometext);
    JTextArea jt2 = new JTextArea(sometext);

    // Make sure our text boxes do line wrapping and have reasonable
    // minimum sizes.
    jt1.setLineWrap(true);
    jt2.setLineWrap(true);
    jt1.setMinimumSize(new Dimension(150, 150));
    jt2.setMinimumSize(new Dimension(150, 150));
    jt1.setPreferredSize(new Dimension(250, 200));
    JSplitPane sp = new JSplitPane(JSplitPane.VERTICAL_SPLIT, jt1, jt2);
    getContentPane().add(sp, BorderLayout.CENTER);
  }

  public static void main(String args[]) {
    Main ssb = new Main();
    ssb.setVisible(true);
  }
}