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HomeJavajavaTutorialHow Can I Resize a JFreeChart to Fit My JPanel?

How Can I Resize a JFreeChart to Fit My JPanel?

How to Resize a JFreeChart

Adding a JFreeChart to a JPanel can result in an oversized display. To address this issue, there are several options available.

When creating the ChartPanel, you can:

  • Accept the default size: It is 680 pixels wide and 420 pixels high.
  • Specify preferred dimensions: Use the constructor to set the desired width and height.
  • Set preferred size explicitly: Invoke setPreferredSize() after creating the ChartPanel, overriding the default if necessary.

To calculate the size dynamically, you can override getPreferredSize():

@Override
public Dimension getPreferredSize() {
    // given some values of w & h
    return new Dimension(w, h);
}

Additionally, the layout of the container containing the ChartPanel can influence its size. The default layout for JPanel is FlowLayout, while that for JFrame is BorderLayout. For example, ThermometerDemo uses both preferred values in the constructor and a GridLayout to enable dynamic resizing.

[Image of ThermometerDemo displaying both preferred values in the constructor and a GridLayout]

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