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java - 饼图到 JPanel netbeans

问题描述

我正在尝试向我的 ui 添加一些图形图表，当它单击时，ui 有一个单独的按钮来查看饼图图表应该出现在面板中我尝试了这段代码

DefaultPieDataset defaultPieDataset = new DefaultPieDataset();
        defaultPieDataset.setValue("Monday", new Integer(0));
        defaultPieDataset.setValue("Tuesday", new Integer(2));
        defaultPieDataset.setValue("Wednesday", new Integer(1));
        defaultPieDataset.setValue("Thursday", new Integer(2));
        defaultPieDataset.setValue("Friday", new Integer(0));
        defaultPieDataset.setValue("Saturday", new Integer(3));
        defaultPieDataset.setValue("Sunday", new Integer(2));
        JFreeChart chart = ChartFactory.createPieChart(Daily Usage", defaultPieDataset, true, true, true);
        PiePlot p = (PiePlot)chart.getPlot();
        p.setDirection(Rotation.CLOCKWISE);
        ChartFrame frame = new ChartFrame("Daily Usage", chart);
        frame.setVisible(true);
        frame.setSize(500,500);
        frame.setLocationRelativeTo(null);

但这使用框架而不是面板有没有办法让这个o显示在jpanel中。我没有使用任何框架

标签： javaswingjpanelframepie-chart

解决方案

您可以将图表添加到ChartPanel，而不是框架，您将拥有一个JPanel.

这是一个包含典型 JPanel的ChartPanel内部的完整示例：JFrame

public class ChartPanelExample extends JFrame {
    public ChartPanelExample() {
        super("");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new BorderLayout());

        JPanel topPanel = new JPanel(new FlowLayout());

        JButton button = new JButton("Something");
        topPanel.add(button);

        JLabel label = new JLabel("This is another JPanel");
        topPanel.add(label);

        add(topPanel, BorderLayout.PAGE_START);

        DefaultPieDataset defaultPieDataset = new DefaultPieDataset();
        defaultPieDataset.setValue("Monday", new Integer(0));
        defaultPieDataset.setValue("Tuesday", new Integer(2));
        defaultPieDataset.setValue("Wednesday", new Integer(1));
        defaultPieDataset.setValue("Thursday", new Integer(2));
        defaultPieDataset.setValue("Friday", new Integer(0));
        defaultPieDataset.setValue("Saturday", new Integer(3));
        defaultPieDataset.setValue("Sunday", new Integer(2));
        JFreeChart chart = ChartFactory.createPieChart("Daily Usage", defaultPieDataset, true, true, true);
        PiePlot p = (PiePlot) chart.getPlot();
        p.setDirection(Rotation.CLOCKWISE);

        ChartPanel chartPanel = new ChartPanel(chart);

        add(chartPanel, BorderLayout.CENTER);

        setLocationByPlatform(true);
        pack();
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> new ChartPanelExample().setVisible(true));
    }
}

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