How Can I Customize JFreeChart's Size within a JPanel?

Customizing JFreeChart Size for a JPanel

In a JPanel, JFreeChart's default size may not always be optimal. Here's how you can customize the size:

1. Specify Preferred Size in Constructor:

JPanel graph = new JPanel(new GridLayout());
graph.add(new ChartPanel(chart, 500, 300));

2. Invoke setPreferredSize()

ChartPanel cp = new ChartPanel(chart);
cp.setPreferredSize(new Dimension(500, 300));

3. Override getPreferredSize()

@Override
public Dimension getPreferredSize() {
    return new Dimension(w, h);
}

4. Choose Container Layout

JPanel's FlowLayout is not ideal for resizing, whereas BorderLayout in JFrame allows dynamic resizing.

5. Other Methods

• setMaximumDrawHeight() and setMaximumDrawWidth() limit the chart's drawable area.
• setZoomOutFactor() shrinks the chart by a factor.

Example:

public void generateChart() {
    DefaultCategoryDataset dataset = new DefaultCategoryDataset();

    //set the values of the chart
    for(int i=0; i<8; i++)
    {
        dataset.setValue(income_array[i], "Income",
            Double.toString(percent_array[i]));
    }

    JFreeChart chart = ChartFactory.createBarChart(
        "Required Annual Income for a Variety of Interest Rates",
        "Percent", "Income", dataset, PlotOrientation.VERTICAL,
        false,true, false);
    ChartPanel cp = new ChartPanel(chart, 500, 300);

    chart.setBackgroundPaint(Color.white);

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