Adding JScrolBar to JTextArea

JScrollPane pane = new JScrollPane(textArea);

then add the pane to your gui instead of your textArea

I mean JScrolBar beacuse I  tried
JScrollPane pane = new JScrollPane(textArea);
but it does not work

a scroll pane will add scrolls as required.
or u can change the policy if u always want them to appear

When I do this

JScrollPane pane = new JScrollPane(textArea);

The textArea is not visible in the frame.

are you adding the scroll pane to your frame?
and *not* adding the text area.

Yes,

I did this:


JScrollPane pane = new JScrollPane();

this.getContentPane().add(pane);

pane = new JScrollPane(textArea);


is it correct?

On the 3rd line you throw the 1st pane away!

;JOOP!

Should be:

JScrollPane pane = new JScrollPane(textArea);

this.getContentPane().add(pane);

;JOOP!

The text is visible now,

Still the scroll bar does not working and it is not visible

Of course not when the text area is smaller than the panel.
Just fill it with lots of text and the scroll bars as needed appear.

You can also force the scrollbars into sight by:

       pane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
       pane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);

but you will probably not like that after some time.

;JOOP!

"Of course not when the text area is smaller than the panel.
Just fill it with lots of text and the scroll bars as needed appear."

It was needed but it was not appear.

OK...

Can some one help me and give me sample exaple:

TextArea with scrollBar.

I gave you a correct and working example.
To what are you adding this JScrollPane?

Try this to see it work:

JFrame fr = new JFrame();
fr.setSize(400, 300);
fr.getContentpane().add(pane, BorderLayout.SOUTH);

And understand why you didn't see it before.

;JOOP!

---------------------------

Lets I have this class

I want to show the all strings written in the TextArea by sorollBar movement down and up.

----------------------------
import javax.swing.JFrame;
import java.awt.Dimension;
import javax.swing.JTextArea;
import java.awt.Rectangle;

public class Frame1 extends JFrame
{
  private JTextArea textArea = new JTextArea();

  public Frame1()
  {
    try
    {
      test();
    }
    catch(Exception e)
    {
      e.printStackTrace();
    }

  }

  private void test() throws Exception
  {
    this.getContentPane().setLayout(null);
    this.setSize(new Dimension(263, 103));
    this.setTitle("Text Area Test");
    textArea.setText("Test\ntest\ntest\nTest\ntest\ntest");
    textArea.setBounds(new Rectangle(10, 5, 230, 50));
    this.getContentPane().add(textArea, null);
  }
}

>>>     this.getContentPane().setLayout(null);  // ????????????????????????????????? Nonsense.

>>>     textArea.setBounds(new Rectangle(10, 5, 230, 50));  // Why? That spoils the whole thing.
 
I don't know how you have come to that code. Why fumble in constructors?
Use my code instead.

;JOOP!

When I call it from the main method it is working

what is wrong in it?


The problem in the ScrollBar only I cannnot do it

Delete that stupid "setLayout(null);"
Do not set the size on the text area! You want it to scroll? Set a size on the JScrollPane().

;JOOP!

May be he listens to you ............................................

He finally did.