java - 如何在 jfreechart、netbeans 中调整此图表的大小？

Question

我似乎无法操纵图表本身。我无法更改大小，chartPanel = createChartPanel(); 不断重写为 chartPanel = javax.swing.panel();

我试图创建一个方法 modificarGrafico，但没有:

示例:http://www.flickr.com/photos/63259070@N06/6371596517/

public JPanel createChartPanel(){
DefaultPieDataset pieDataset = new DefaultPieDataset();
pieDataset.setValue("Toyota", new Integer(10));
pieDataset.setValue("Nissan", new Integer(25));
pieDataset.setValue("Hummer", new Integer(5));
pieDataset.setValue("BMW", new Integer(10));
pieDataset.setValue("Honda", new Integer(30));
pieDataset.setValue("Ford", new Integer(20));
JFreeChart chart = ChartFactory.createPieChart3D("Ventas por Marca", pieDataset, true,         true, true);
return new ChartPanel(chart);
}

public void modificarGrafico(){
//JDesktopPane dtp = new JDesktopPane();

   this.chartPanel.setSize(200,200);
   this.chartPanel.setVisible(rootPaneCheckingEnabled);

   }

Answer 1

您不必担心图表大小，将面板的布局设置为 GridBagLayout这应该有所帮助。