我想建立一个使用机器学习算法进行数据分析的软件，我需要在图表中可视化数据进行预处理。我使用以下代码在jtable中显示数据：我使用jfilechooser打开文件并在jtable中显示数据，如下所示：

JFileChooser Chooser = new JFileChooser();
FileNameExtensionFilter filter =new FileNameExtensionFilter ("open file 
","csv");
Chooser.setFileFilter(filter);
Chooser.showOpenDialog(null);
File f = Chooser.getSelectedFile();
if (f != null) {
   String filename1 = f.getAbsolutePath();
   filepath.setText(filename1);
} else {
  JOptionPane.showMessageDialog(this, "No File Selected");
}      
  filePath1 = filepath.getText();
 File file = new File(filePath1);
    //send data to the other tab 
jTable1.setModel(new DefaultTableModel(null,new String[] 
{"column1","column2","column3","column4"}));
     try {
        BufferedReader br = new BufferedReader(new FileReader(file));
        // get the first line
        // get the columns name from the first line
        // set columns name to the jtable model
        String firstLine = br.readLine();
        String[] columnsName = firstLine.split(",");

        DefaultTableModel model = (DefaultTableModel) jTable1.getModel();
        model.setColumnIdentifiers(columnsName);
       attributesNum= columnsName.length;
        String st;
        String eachline;
        String[] cells;
       DefaultCategoryDataset bardataset =new  DefaultCategoryDataset();

        // there is a new line 
        while ((st = br.readLine()) != null) {
         // System.out.println(st); 
             eachline = st.trim();
            cells = eachline.split(",");
            //show each line in jtable
            model.addRow(cells);

之后，我想用类似于weka的条形图将表中的数据可视化，但是我找不到一个方法来实现这一点，我找到的方法是创建数据集并将其填充到代码中。