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POupdating JLabel image, dynamic via selection
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copied!<p>So basically im creating a GUI that allows the user to select a file, this file is check to be a .wav file. Then this file's data is graphed through <a href="http://www.jfree.org/jfreechart/" rel="nofollow">JFreechart</a>. This graph or image created by Jfreechart i want to put into the JFrame. The problem is that the code:</p> <pre><code> ImageIcon myIcon1 = new ImageIcon("blah.jpg"); JLabel graphLabel1 = new JLabel(myIcon1); southContent.add(graphLabel1); </code></pre> <p>must be created & declared in the method where i create the JFrame ( must be added to the frame ) thus i cannot dynamically update the image to new created graphs, depending on what file the user selects. ( on selection of a new file, via button a new graph image is created )</p> <p>is there a way to force</p> <pre><code> ImageIcon myIcon1 = new ImageIcon("blah.jpg"); JLabel graphLabel1 = new JLabel(myIcon1); southContent.add(graphLabel1); </code></pre> <p>to update to the new image ( in the same direcotry, with the same name )</p> <p>or is there a way using Mapping to set the image name ("blah.jpg") dynamically with a counter?</p> <p>here is my SSCCE</p> <pre><code>public class gui extends JFrame { ImageIcon myIcon1 = new ImageIcon("C:/location/chart1.jpg"); JLabel graphLabel1 = new JLabel(myIcon1); gui() { // create Pane + contents & listeners... JPanel content = new JPanel(); JPanel southContent = new JPanel(); content.setLayout(new FlowLayout()); content.add(open_File); // Jfreechart graph image -- not visible until selected graphLabel1.setVisible(false); // this is the graph image being added to the panel southContent.add(graphLabel1); southContent.setLayout(new FlowLayout()); // add action listeners to buttons open_File.addActionListener(new OpenAction()); // set Pane allignments & size... this.setContentPane(content); this.add(southContent, BorderLayout.SOUTH); this.setTitle("Count Words"); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setSize(1100, 720); this.setLocationRelativeTo(null); } // opening selected file directory. class OpenAction implements ActionListener { public void actionPerformed(ActionEvent ae) { /// gets user selection ( file ) and procesess .wav data into array /// loops through array creating X series for JfreeChart // Add the series "series" to data set "dataset" dataset.addSeries(series); // create the graph JFreeChart chart = ChartFactory.createXYLineChart( ".Wav files", // Graph Title "Bytes", // X axis name "Frequency", // Y axis name dataset, // Dataset PlotOrientation.VERTICAL, // Plot orientation true, // Show Legend true, // tooltips false // generate URLs? ); try { ChartUtilities.saveChartAsJPEG( new File("C:/location/chart1.jpg"), chart, 1000, 600); } catch (IOException e) { System.err.println("Error occured: " + e + ""); } // !!!!! this is where i need to set the ImageIcon added to the // panel in "gui" to this new created Graph image ("chart1.jpg") // as above // ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ // sets the image label itself to visible as a new image has been // added ot it graphLabel1.setVisible(true); } } } </code></pre>

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