I can't get the scroll bar appears

I have two questions: 1. the JPanel locked in the get does not resize when the dialog box is made smaller or larger.
2. the scroll bar does not appear.

Here is my code:

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

public class AJPanelScrollTest extends JDialog
{
     public static void main(String[] args)
     {
          JDialog outerDialog = new JDialog();
          JPanel thePanel = new JPanel();
          JScrollPane theScroll = new JScrollPane(thePanel);
          theScroll.setPreferredSize(new Dimension(400, 400));
          
          outerDialog.setLayout(new BorderLayout());
          outerDialog.add(theScroll, BorderLayout.NORTH);
          outerDialog.setVisible(true);
          outerDialog.pack();
          outerDialog.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
                                outerDialog.setTitle("Some Title");

     }
}

Published by: 799076 on December 5, 2010 16:25

Which should be good, or you could just do:

//outerDialog.add(theScroll, BorderLayout.NORTH);
outerDialog.add(theScroll);

You must understand what the constraints of a LayoutManager OQ before using. By default, a component is added to the CENTER, which gets all the space available.

Tags: Java

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