JScrollpane only visible after maximising window Java Swing

Question

I'm using JScrollPane to put inside a JTable with some values, but the JScrollPane has to be invisible until user clicks on a button. But the JScrollPane remains not visible until I maximise the window manually. I've tried almost everything, .validate(); .revalidate(); .repaint()... I'm using Netbeans, and on the Custom Code of the JScrollPane I've wrote this:

scrollPane = new javax.swing.JScrollPane();
this.scrollPane.setVisible(false);
// El código de los subcomponentes y del gestor de distribución - no se muestra aquí

// El código que agrega el componente al contenedor superior - no se muestra aquí

Then, on MouseReleased:

private void botoGeneraLlistatMouseReleased(java.awt.event.MouseEvent evt) {
    this.generaLlistat();
}

And on the end of generaLlistat():

public void generaLlistat(){{
   ...(Some code requesting data from DB)
   JTable table = new JTable(rows, headings);
   scrollPane.setViewportView(table);
   this.scrollPane.setVisible(true);
   statement.close();
   connection.close();
}

I will appreciate any help :) Thank you all, and sorry about my english grammar and spelling.

score 3 · Accepted Answer · answered Aug 31 '12 at 23:38

Try doing this way:

package stack;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;

public class Aitor extends JFrame implements ActionListener{
    JTable table;
    JPanel panel = new JPanel();
    JButton button = new JButton("Add"); 

    String data[][]={{"hey","hey"},{"hey","hey"},{"hey","hey"},{"hey","hey"},                        {"hey","hey"},{"hey","hey"}
,{"hey","hey"},{"hey","hey"},{"hey","hey"},{"hey","hey"},{"hey","hey"},{"hey","hey"},{"hey","hey"},{"hey","hey"}
,{"hey","hey"},{"hey","hey"}};
    String columns[] = {"First","Second"};

    public Aitor(){
        setLayout(new BorderLayout());
        panel.setLayout(new BorderLayout());
        panel.setPreferredSize(new Dimension(500,400));
        button.addActionListener(this);
        add(panel,BorderLayout.CENTER);
        add(button, BorderLayout.SOUTH);

    }

    public static void main(String [] a){
        Aitor aitor = new Aitor();
        aitor.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        aitor.pack();
        aitor.setVisible(true);
    }

    @Override
    public void actionPerformed(ActionEvent arg0) {
        panel.removeAll();
        table =new JTable(data,columns);
        panel.add(new JScrollPane(table),BorderLayout.CENTER);
        repaint();
        revalidate();
    }
}

Oh, sorry about my lack of manners, I was really emotional at that moment. Thanks :D — Aitor Gonzalez, Sep 18 '12 at 13:49

score 2 · Answer 2 · answered Aug 31 '12 at 23:37

2

You can just call pack() on your container after calling setVisible(true) and and your scrollpane will appear.

answered Aug 31 '12 at 23:37

Reimeus

158,255
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calling pack() certainly works, only downside with this approach is the UI will then go in 'Restore' mode. This creates problem if you want your UI to be in maximized mode. Using 'setExtendedState(MAXIMIZED_BOTH);' right after pack() should help. – Stack2Heap Apr 14 '20 at 22:16

score 1 · Answer 3 · edited May 23 '17 at 12:17

1

You can use setPreferredScrollableViewportSize(), as shown here and here, although it has some of the same drawbacks mentioned here.

edited May 23 '17 at 12:17

Community

1
1

answered Aug 31 '12 at 23:57

trashgod

203,806
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1,045

score -1 · Answer 4 · edited Feb 09 '14 at 15:17

-1

Try this coding if youu arer using jframe.

In constructor method, give

Jscrollpane.setVisible (false);

Give the particular jscrollpane which is associated with your jtable in jframe.

Then in actionperformed method give

Jscrollpane. setvisible (true); 
pack ();

It would help.....

edited Feb 09 '14 at 15:17

ProgramFOX

6,131
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answered Feb 09 '14 at 14:52

user3289859

1

JScrollpane only visible after maximising window Java Swing

4 Answers4