I am a new in jbuilder 4, a simple question, please help me.

Question

I want to combine the scroll bar with textarea. I mean that If the content in textarea is very large, I can scroll bar to see it.
I write the code like this:
JTextArea jTextArea1 = new JTextArea();
JScrollBar jScrollBar1 = new JScrollBar(jTextArea1); But the error message is :"Frame1.java": Error #: 300 : constructor JScrollBar(javax.swing.JTextArea) not found in class javax.swing.JScrollBar at line 21, column 32
The following is the full code:
public class Frame1 extends JFrame {
  JPanel contentPane;
  BorderLayout borderLayout1 = new BorderLayout();
  JTabbedPane jTabbedPane1 = new JTabbedPane();
  JPanel jPanel1 = new JPanel();
  JPanel jPanel2 = new JPanel();
  JPanel jPanel3 = new JPanel();
  BorderLayout borderLayout2 = new BorderLayout();
  JTextArea jTextArea1 = new JTextArea();
  JScrollBar jScrollBar1 = new JScrollBar();
  JPanel jPanel4 = new JPanel();
  JButton jButton1 = new JButton();
  BorderLayout borderLayout3 = new BorderLayout();
  JTextArea jTextArea2 = new JTextArea();
  JScrollBar jScrollBar2 = new JScrollBar();
  JPanel jPanel5 = new JPanel();
  JButton jButton2 = new JButton();
  /**Construct the frame*/
  public Frame1() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    catch(Exception e) {
      e.printStackTrace();
  /**Component initialization*/
  private void jbInit() throws Exception  {
    //setIconImage(Toolkit.getDefaultToolkit().createImage(Frame1.class.getResource("[Your Icon]")));
    contentPane = (JPanel) this.getContentPane();
    contentPane.setLayout(borderLayout1);
    this.setSize(new Dimension(513, 399));
    this.setTitle("File Integrity Check Tool");
    jPanel1.setLayout(borderLayout2);
    jButton1.setToolTipText("");
    jButton1.setText("Register Files");
    jButton1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton1_actionPerformed(e);
    jPanel2.setLayout(borderLayout3);
    jButton2.setText("Check Files");
    jButton2.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton2_actionPerformed(e);
    jTextArea1.setEditable(false);
    jTextArea1.setMaximumSize(new Dimension(513, 399));
    jTextArea2.setEditable(false);
    contentPane.add(jTabbedPane1, BorderLayout.CENTER);
    jTabbedPane1.add(jPanel1, "Register Checkfile");
    jPanel1.add(jTextArea1, BorderLayout.CENTER);
    jPanel1.add(jScrollBar1, BorderLayout.EAST);
    jPanel1.add(jPanel4, BorderLayout.SOUTH);
    jPanel4.add(jButton1, null);
    jTabbedPane1.add(jPanel2, "Check Files");
    jPanel2.add(jTextArea2, BorderLayout.CENTER);
    jPanel2.add(jScrollBar2, BorderLayout.EAST);
    jPanel2.add(jPanel5, BorderLayout.SOUTH);
    jPanel5.add(jButton2, null);
    jTabbedPane1.add(jPanel3, "Help");
  /**Overridden so we can exit when window is closed*/
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
  }

Answer 1

yes, I done like this:
package untitled1;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Frame1 extends JFrame {
  JPanel contentPane;
  BorderLayout borderLayout1 = new BorderLayout();
  JTabbedPane jTabbedPane1 = new JTabbedPane();
  JPanel jPanel1 = new JPanel();
  BorderLayout borderLayout2 = new BorderLayout();
  JTextArea jTextArea1 = new JTextArea();
  JScrollPane jScrollPane1 = new JScrollPane( jTextArea1);
  JPanel jPanel2 = new JPanel();
  JButton jButton1 = new JButton();
  /**Construct the frame*/
  public Frame1() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    catch(Exception e) {
      e.printStackTrace();
  /**Component initialization*/
  private void jbInit() throws Exception  {
    //setIconImage(Toolkit.getDefaultToolkit().createImage(Frame1.class.getResource("[Your Icon]")));
    contentPane = (JPanel) this.getContentPane();
    contentPane.setLayout(borderLayout1);
    this.setSize(new Dimension(400, 300));
    this.setTitle("Frame Title");
    jPanel1.setLayout(borderLayout2);
    jTextArea1.setText("jTextArea1");
    jButton1.setText("jButton1");
    contentPane.add(jTabbedPane1, BorderLayout.CENTER);
    jTabbedPane1.add(jPanel1, "jPanel1");
    jPanel1.add(jTextArea1, BorderLayout.CENTER);
    jPanel1.add(jPanel2, BorderLayout.SOUTH);
    jPanel2.add(jButton1, null);
    jPanel1.add(jScrollPane1, BorderLayout.EAST);
  /**Overridden so we can exit when window is closed*/
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
}But it is still not show the scroll bar on the right of textarea.
what is the problem.