使用变量作为文件路径将ImageIcon添加到JPanel

Question

I have a csv file containing the file names of all my images. I want to extract the file names from that file and use them to add the corresponding image to my GUI. I have a lot of images so I can't just type out all the file paths.

It works if I use

img = new ImageIcon("resources/imagename.jpg");

but not if I use

String fileName = "resources/" + fileNameExtractedFromCSVFile;
img = new ImageIcon(fileName);

It's extracting the file name just fine, it just won't use it to locate the image. I would appreciate any help.

Answer 1

inspect the value of fileNameExtractedFromCSVFile before using it. seems like its not getting populated properly. If you are using an IDE, try to run the code in DEBUG mode and put a break point on this line to see what the value of the variables are.

Answer 2

If I did understood you correctly you need something like this please see the demo below and the code for it. In addition please created images package in your application.

add this method to your class to read csv

   public void csvread() throws IOException 
    {
        File file = new File("filenames.csv");
    List<String> lines = Files.readAllLines(file.toPath(), 
            StandardCharsets.UTF_8);
    for (String line : lines) {
        String[] array = line.split(",");
        jTextArea1.append(array[0]+"\n");
    }

    }

button csv read action

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {

    try {
        csvread();
    } catch (IOException ex) {
        Logger.getLogger(ImageDisplay.class.getName()).log(Level.SEVERE, null, ex);
    }


} 

text area mouse released get selected text and display image on jlabel

private void jTextArea1MouseReleased(java.awt.event.MouseEvent evt) {                                         

    if (jTextArea1.getSelectedText() != null) {

        String s = jTextArea1.getSelectedText();

        ImageIcon imageselect = new ImageIcon(getClass().getResource("/images/" + s));
        jLabel2.setIcon(imageselect);

    } else {
        jLabel4.setVisible(true);
    }

}