Java Swing 如何在JPanel中显示图形组件

Question

I have an app with the following layout:

After I click the next screen button, it will hide all the components and several pie and bar charts should appear.

All this code is in my GUI class, then I have a different class, called the PieChart class similar to this which generates the chart using the Java Graphics How can I call this class and display the graph inside a Panel or inside my frame? Thank you!

Answer 1

If the PieChart extends a component then it can simply be placed into a panel for example chartPanel.add(chart); , then you can use a card layout or you can manually toggle visibility as mentioned in the comments. Here is a basic example of changing the visibility of components:

JFrame frame = new JFrame("Demo");
JPanel mainPanel = new JPanel();
JPanel chartPanel = new JPanel();
JButton button = new JButton("View Chart");

frame.add(mainPanel);
frame.add(chartPanel);
mainPanel.add(button);
chartPanel.setVisible(false);

//Add event to create asd show the pie chart
button.addActionListener(new ActionListener(){
    @Override
    public void actionPerformed(ActionEvent e)
    {
        //Remove any previous chart
        chartPanel.removeAll();

        //Create and add new chart based on data
        PieChart chart = new PieChart(yourData);
        chartPanel.add(chart);
    
        //Hide the main panel with the buttons, and show the chart panel instead
        chartPanel.setVisible(true);
        mainPanel.setVisible(false);
    }
});

Note that you would need to add another button to the chartPanel so that you can swap back to the main panel if needed.