Java JScrollPane

Question

I'm trying to add a Vertical scrolling my java programs textarea. I am using this code to create my JScrollPane:

console = my textarea.

I am also Declaring JScrollPane vertical;

        vertical = new JScrollPane(console);
    vertical.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
    vertical.setVisible(true);
    this.add(vertical);

EDIT:

View of program:

enter image description here I'm new to Java but shouldn't that work and add a Vertical scroll bar to my textarea

What am I doing wrong?

Thanks for any help.

Looks correct... Could you upload some screenshot of what you are actually getting? — fortran, Oct 14 '11 at 11:28
Don't you have to do it the other way around? Add the text area to the scroll pane. — Ben van Gompel, Oct 14 '11 at 11:38
Oh, wait, I think that's already what you are doing. I must have misread your question. I'll think about it some more. — Ben van Gompel, Oct 14 '11 at 11:50
For better help sooner, post an [SSCCE](http://pscode.org/sscce.html). BTW - it seems very strange that the "Load" & "Save" buttons are not aligned. I suspect that is a symptom of the problem. — Andrew Thompson, Oct 14 '11 at 12:11
@AndrewThompson they aren't aligned because I haven't gotten around to finishing them perfectly. and — Duncan Palmer, Oct 14 '11 at 12:18

Eng.Fouad · Accepted Answer · 2011-10-14T12:09:33.503

10

Here is an example:

enter image description here

import java.awt.Dimension;
import javax.swing.*;

public class ScrolledPane extends JPanel
{
    private JScrollPane vertical;
    private JTextArea console;

    public ScrolledPane()
    {
        setPreferredSize(new Dimension(200, 250));
        console = new JTextArea(15, 15);

        vertical = new JScrollPane(console);
        vertical.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
        add(vertical);
    }


    public static void main( String args[] )
    {
        new JFrame()
        {{
            getContentPane().add(new ScrolledPane());
            pack();
            setVisible(true);
        }};
    }
}

edited Oct 14 '11 at 12:09

answered Oct 14 '11 at 11:55

Eng.Fouad

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1

please amend that new JTextArea(int, int);, then is definitions for PreferredSize use-less +1 – mKorbel Oct 14 '11 at 11:59
Thanks for the great example it works now, but for some reason it is always in the middle of the window, shown here - http://screensnapr.com/v/LnRvql.png is there any way I can set a custom location? – Duncan Palmer Oct 14 '11 at 12:12

score 8 · Answer 2 · answered Oct 14 '11 at 11:51

I think that in official tutorial about JTextArea and JScrollPane is described everything about that, another examples here and here

mySchroll = new JScrollPane(myTextArea, 
    ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
    ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);

score 0 · Answer 3 · answered Aug 27 '18 at 03:28

import javax.swing.*;
import java.awt.*;

public class Demo extends JFrame {

    private JTextArea textArea;
    private JScrollPane scroll;

    Demo(){
        super("Write here...");
        textArea = new JTextArea();
        scroll = new JScrollPane(textArea);
        scroll.setVerticalScrollBarPolicy(22); /*22 is a const value for always vertical */
        add(scroll, BorderLayout.CENTER);

        setSize(270,270);
        setVisible(true);

    }

    public static void main(String[] args) {
        new Demo();
    }



}

Output of the code : See

Java JScrollPane

3 Answers3

Linked