jpanel - jPanel 图表面板中的 Jfreechart 不显示

Question

我已经创建了 JFreeChart 并将其放入图表面板(按照建议)。我还将它添加到 jPanel 中。我正在使用 jFrame。但是运行程序后我的图表不可见。有谁能帮帮我吗？

final JFreeChart chart = ChartFactory.createXYLineChart(
        "XY Series Demo",
        "iterácie", 
        "%", 
        data,
        PlotOrientation.VERTICAL,
        true,
        true,
        false
    );

    final ChartPanel chartPanel = new ChartPanel(chart);
    //chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
    chartPanel.setDomainZoomable(true);
    chartPanel.setVisible(true);
    jPanel1.add(chartPanel, BorderLayout.CENTER);

Answer 1

(在问题编辑中回答。转换为社区维基答案。参见 What is the appropriate action when the answer to a question is added to the question itself?)

OP 写道:

[SOLVED] I was missing these two:

jPanel1.setLayout(new java.awt.BorderLayout());
jPanel1.validate();