Java&JFreeChart - How to set a JFreeChart's ChartPanel resize with it's container ( say JPanel )?

Question

I just found that when i add a ChartPanel to a JFrame, the ChartPanel will resize to fit the frame as the JFrame dragged larger or smaller. However, when i add the ChartPanel to a JPanel, the JPanel's size( width and height ) changes to fit the JFrame as the JFrame resized. But the ChartPanel just keeps it's dimensions, leaving the enlarged JPanel a lot of empty space. How to make ChartPanel resize with it's container in GUI?

Here is my sample codes :

This case the chart resize with the JFrame

ChartPanel chartPanel = new ChartPanel(createWhateverChart());
JFrame frame = new JFrame();
frame.add(chartPanel);

In the case, i add the ChartPanel to JPanel first, for ease of management and update the chart but the ChartPanel doesn't resize with the JPanel/JFrame.

ChartPanel chartPanel = new ChartPanel(createWhateverChart());
JPanel panel = new JPanel("Who cares");
panel.add(chartPanel, BorderLayout.CENTER);
JFrame frame = new JFrame();
frame.add(panel);

for better help sooner post an [SSCCE](http://sscce.org/), up_to JPanel holds JFreeChart, plaint code about contianers, without implementations for JFreeChart — mKorbel, Nov 05 '12 at 09:25
re Heisenbug : for JPanel case, BorderLayer. ChartPanel added with BorderLayout.CENTER — n0obiscuitz, Nov 05 '12 at 09:31
@Biscuitz: try use BoxLayout/FlowLayout instead, or post an SSCCE like suggested mKorbel. — Heisenbug, Nov 05 '12 at 09:33
re mKorbel : Thanks for your advice. I just think that my codes are not very useful in this discussion. Anyway, i added the codes back. — n0obiscuitz, Nov 05 '12 at 09:40
`GridLayout`, shown here, is also helpful for this. You can [answer (or delete) your own question](http://meta.stackexchange.com/q/17463/163188). — trashgod, Nov 05 '12 at 11:14

V-Q-A NGUYEN · Accepted Answer · 2014-01-17T12:33:52.720

Try my code and it works fine.

Note that :

I have one frame which contains a panelMain, A panelMain contains a subPanel and a subPanel contains ChartPanel.

frame.setLayout(new BoxLayout(frame.getContentPane(), BoxLayout.Y_AXIS));                      
JPanel panelMain = new JPanel(new GridLayout(0,2));            
ChartPanel chartPanel = createChart();        
JPanel subPanel = new JPanel(new BorderLayout());   
subPanel.setBorder(BorderFactory.createTitledBorder("Consommation"));
subPanel.setPreferredSize(new Dimension(400, 200));    
subPanel.add(chartPanel);   


panelMain.add(subPanel);        
frame.add(panelMain);        
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);

And now when you resize your window application. Your chartPanel will resized automatically. Hope this helps.

Java&JFreeChart - How to set a JFreeChart's ChartPanel resize with it's container ( say JPanel )?

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