JFrame Repaint problem

Question

I am new to Java Swing and I have a problem.
I have a GUI program which extends JFrame and contains some business logic. In the middle of executing the business logic, I need to display a chart and I used another JFrame to display the chart. The chart did display but once the control return back to the original process, the chart Jframe turn blank. How can I get the display of the chart until user closes it?
public class ChangeMetric extend JFrame implements ActionListener {
public void actionPerformed(ActionEvent event) {
JFrame jf = new JFrame();
JPanel jp = new JPanel();
jp.setSize(500,500);
jf.getContentPane().add(jp);
jf.setVisible(true);
JOptionPane.showConfirmDialog(null, "Report has been saved to : " + path + "\n " +
               "Do you want another report?", "Completed", JOptionPane.YES_NO_OPTION);
//Jf turn blank after the JoptionPane displayed.
Thanks in advance.
Alex

Answer 1

I need to display a chart and I used another JFrame to display the chart.An application should only have a single JFrame. Use a JDialog instead. You create it the same way you do a JFrame, the only difference is you specify the frame as the owner.
Jf turn blank after the JoptionPane displayed.Then you must be doing something really wierd in your code. There is no reason for the option pane to have any effect on your dialog.
And when you post your SSCCE, don't forget to use the Code Formatting Tags so the posted code retains its original formatting. That is done by selecting the code and then clicking on the "Code" button above the question input area.